IGMP plugin
[vpp.git] / src / vnet / fib / fib_test.c
index cbb5640..61ba934 100644 (file)
@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include <vnet/fib/fib_test.h>
 #include <vnet/fib/ip6_fib.h>
 #include <vnet/fib/ip4_fib.h>
 #include <vnet/fib/mpls_fib.h>
 #include <vnet/dpo/receive_dpo.h>
 #include <vnet/dpo/ip_null_dpo.h>
 #include <vnet/bfd/bfd_main.h>
-#include <vnet/dpo/interface_dpo.h>
+#include <vnet/dpo/interface_rx_dpo.h>
 #include <vnet/dpo/replicate_dpo.h>
+#include <vnet/dpo/dvr_dpo.h>
+#include <vnet/dpo/mpls_disposition.h>
 
 #include <vnet/mpls/mpls.h>
 
+#include <vnet/fib/fib_test.h>
 #include <vnet/fib/fib_path_list.h>
 #include <vnet/fib/fib_entry_src.h>
 #include <vnet/fib/fib_walk.h>
 #include <vnet/fib/fib_node_list.h>
 #include <vnet/fib/fib_urpf_list.h>
 
+#include <vlib/unix/plugin.h>
+
 /*
  * Add debugs for passing tests
  */
@@ -266,83 +272,6 @@ fib_test_build_rewrite (u8 *eth_addr)
     return (rewrite);
 }
 
-typedef enum fib_test_lb_bucket_type_t_ {
-    FT_LB_LABEL_O_ADJ,
-    FT_LB_LABEL_STACK_O_ADJ,
-    FT_LB_LABEL_O_LB,
-    FT_LB_O_LB,
-    FT_LB_SPECIAL,
-    FT_LB_ADJ,
-    FT_LB_INTF,
-} fib_test_lb_bucket_type_t;
-
-typedef struct fib_test_lb_bucket_t_ {
-    fib_test_lb_bucket_type_t type;
-
-    union
-    {
-       struct
-       {
-           mpls_eos_bit_t eos;
-           mpls_label_t label;
-           u8 ttl;
-           adj_index_t adj;
-       } label_o_adj;
-       struct
-       {
-           mpls_eos_bit_t eos;
-           mpls_label_t label_stack[8];
-           u8 label_stack_size;
-           u8 ttl;
-           adj_index_t adj;
-       } label_stack_o_adj;
-       struct
-       {
-           mpls_eos_bit_t eos;
-           mpls_label_t label;
-           u8 ttl;
-           index_t lb;
-       } label_o_lb;
-       struct
-       {
-           index_t adj;
-       } adj;
-       struct
-       {
-           index_t lb;
-       } lb;
-       struct
-       {
-           index_t adj;
-       } special;
-    };
-} fib_test_lb_bucket_t;
-
-typedef enum fib_test_rep_bucket_type_t_ {
-    FT_REP_LABEL_O_ADJ,
-    FT_REP_DISP_MFIB_LOOKUP,
-    FT_REP_INTF,
-} fib_test_rep_bucket_type_t;
-
-typedef struct fib_test_rep_bucket_t_ {
-    fib_test_rep_bucket_type_t type;
-
-    union
-    {
-       struct
-       {
-           mpls_eos_bit_t eos;
-           mpls_label_t label;
-           u8 ttl;
-           adj_index_t adj;
-       } label_o_adj;
-       struct
-       {
-           adj_index_t adj;
-       } adj;
-   };
-} fib_test_rep_bucket_t;
-
 #define FIB_TEST_LB(_cond, _comment, _args...)                 \
 {                                                              \
     if (!FIB_TEST_I(_cond, _comment, ##_args)) {               \
@@ -353,7 +282,7 @@ typedef struct fib_test_rep_bucket_t_ {
 int
 fib_test_validate_rep_v (const replicate_t *rep,
                          u16 n_buckets,
-                         va_list ap)
+                         va_list *ap)
 {
     const fib_test_rep_bucket_t *exp;
     const dpo_id_t *dpo;
@@ -364,7 +293,7 @@ fib_test_validate_rep_v (const replicate_t *rep,
 
     for (bucket = 0; bucket < n_buckets; bucket++)
     {
-       exp = va_arg(ap, fib_test_rep_bucket_t*);
+       exp = va_arg(*ap, fib_test_rep_bucket_t*);
 
         dpo = replicate_get_bucket_i(rep, bucket);
 
@@ -374,7 +303,8 @@ fib_test_validate_rep_v (const replicate_t *rep,
            {
                const mpls_label_dpo_t *mld;
                 mpls_label_t hdr;
-               FIB_TEST_LB((DPO_MPLS_LABEL == dpo->dpoi_type),
+               FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
+                             == dpo->dpoi_type),
                             "bucket %d stacks on %U",
                             bucket,
                             format_dpo_type, dpo->dpoi_type);
@@ -407,7 +337,7 @@ fib_test_validate_rep_v (const replicate_t *rep,
            }
            break;
        case FT_REP_INTF:
-            FIB_TEST_LB((DPO_INTERFACE == dpo->dpoi_type),
+            FIB_TEST_LB((DPO_INTERFACE_RX == dpo->dpoi_type),
                         "bucket %d stacks on %U",
                         bucket,
                         format_dpo_type, dpo->dpoi_type);
@@ -428,8 +358,8 @@ fib_test_validate_rep_v (const replicate_t *rep,
 
 int
 fib_test_validate_lb_v (const load_balance_t *lb,
-                       u16 n_buckets,
-                       va_list ap)
+                       int n_buckets,
+                       va_list *ap)
 {
     const dpo_id_t *dpo;
     int bucket;
@@ -440,7 +370,7 @@ fib_test_validate_lb_v (const load_balance_t *lb,
     {
        const fib_test_lb_bucket_t *exp;
 
-       exp = va_arg(ap, fib_test_lb_bucket_t*);
+       exp = va_arg(*ap, fib_test_lb_bucket_t*);
        dpo = load_balance_get_bucket_i(lb, bucket);
 
        switch (exp->type)
@@ -448,14 +378,19 @@ fib_test_validate_lb_v (const load_balance_t *lb,
        case FT_LB_LABEL_STACK_O_ADJ:
            {
                const mpls_label_dpo_t *mld;
+                mpls_label_dpo_flags_t mf;
                 mpls_label_t hdr;
                u32 ii;
 
-               FIB_TEST_LB((DPO_MPLS_LABEL == dpo->dpoi_type),
+                mf = ((exp->label_stack_o_adj.mode ==
+                       FIB_MPLS_LSP_MODE_UNIFORM) ?
+                      MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
+                      MPLS_LABEL_DPO_FLAG_NONE);
+               FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
                           "bucket %d stacks on %U",
                           bucket,
                           format_dpo_type, dpo->dpoi_type);
-           
+
                mld = mpls_label_dpo_get(dpo->dpoi_index);
 
                FIB_TEST_LB(exp->label_stack_o_adj.label_stack_size == mld->mld_n_labels,
@@ -506,7 +441,8 @@ fib_test_validate_lb_v (const load_balance_t *lb,
            {
                const mpls_label_dpo_t *mld;
                 mpls_label_t hdr;
-               FIB_TEST_LB((DPO_MPLS_LABEL == dpo->dpoi_type),
+               FIB_TEST_LB((mpls_label_dpo_get_type(MPLS_LABEL_DPO_FLAG_NONE)
+                             == dpo->dpoi_type),
                           "bucket %d stacks on %U",
                           bucket,
                           format_dpo_type, dpo->dpoi_type);
@@ -541,13 +477,18 @@ fib_test_validate_lb_v (const load_balance_t *lb,
        case FT_LB_LABEL_O_LB:
            {
                const mpls_label_dpo_t *mld;
+                mpls_label_dpo_flags_t mf;
                 mpls_label_t hdr;
 
-               FIB_TEST_LB((DPO_MPLS_LABEL == dpo->dpoi_type),
+                mf = ((exp->label_o_lb.mode ==
+                       FIB_MPLS_LSP_MODE_UNIFORM) ?
+                      MPLS_LABEL_DPO_FLAG_UNIFORM_MODE :
+                      MPLS_LABEL_DPO_FLAG_NONE);
+               FIB_TEST_LB((mpls_label_dpo_get_type(mf) == dpo->dpoi_type),
                           "bucket %d stacks on %U",
                           bucket,
                           format_dpo_type, dpo->dpoi_type);
-           
+
                mld = mpls_label_dpo_get(dpo->dpoi_index);
                 hdr = clib_net_to_host_u32(mld->mld_hdr[0].label_exp_s_ttl);
 
@@ -588,8 +529,42 @@ fib_test_validate_lb_v (const load_balance_t *lb,
                        bucket,
                        exp->adj.adj);
            break;
+       case FT_LB_MPLS_DISP_PIPE_O_ADJ:
+        {
+            const mpls_disp_dpo_t *mdd;
+
+            FIB_TEST_I((DPO_MPLS_DISPOSITION_PIPE == dpo->dpoi_type),
+                      "bucket %d stacks on %U",
+                      bucket,
+                      format_dpo_type, dpo->dpoi_type);
+
+            mdd = mpls_disp_dpo_get(dpo->dpoi_index);
+
+            dpo = &mdd->mdd_dpo;
+
+           FIB_TEST_I(((DPO_ADJACENCY == dpo->dpoi_type) ||
+                       (DPO_ADJACENCY_INCOMPLETE == dpo->dpoi_type)),
+                      "bucket %d stacks on %U",
+                      bucket,
+                      format_dpo_type, dpo->dpoi_type);
+           FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
+                       "bucket %d stacks on adj %d",
+                       bucket,
+                       exp->adj.adj);
+           break;
+        }
        case FT_LB_INTF:
-           FIB_TEST_I((DPO_INTERFACE == dpo->dpoi_type),
+           FIB_TEST_I((DPO_INTERFACE_RX == dpo->dpoi_type),
+                      "bucket %d stacks on %U",
+                      bucket,
+                      format_dpo_type, dpo->dpoi_type);
+           FIB_TEST_LB((exp->adj.adj == dpo->dpoi_index),
+                       "bucket %d stacks on adj %d",
+                       bucket,
+                       exp->adj.adj);
+           break;
+       case FT_LB_L2:
+           FIB_TEST_I((DPO_DVR == dpo->dpoi_type),
                       "bucket %d stacks on %U",
                       bucket,
                       format_dpo_type, dpo->dpoi_type);
@@ -604,29 +579,75 @@ fib_test_validate_lb_v (const load_balance_t *lb,
                        bucket,
                        format_dpo_type, dpo->dpoi_type);
            FIB_TEST_LB((exp->lb.lb == dpo->dpoi_index),
-                       "bucket %d stacks on lb %d",
+                       "bucket %d stacks on lb %d not %d",
                        bucket,
-                       exp->lb.lb);
+                       dpo->dpoi_index,
+                        exp->lb.lb);
            break;
-       case FT_LB_SPECIAL:
-           FIB_TEST_I((DPO_DROP == dpo->dpoi_type),
-                      "bucket %d stacks on %U",
-                      bucket,
-                      format_dpo_type, dpo->dpoi_type);
-           FIB_TEST_LB((exp->special.adj == dpo->dpoi_index),
-                       "bucket %d stacks on drop %d",
+       case FT_LB_BIER_TABLE:
+           FIB_TEST_LB((DPO_BIER_TABLE == dpo->dpoi_type),
+                        "bucket %d stacks on %U",
+                        bucket,
+                        format_dpo_type, dpo->dpoi_type);
+           FIB_TEST_LB((exp->bier.table == dpo->dpoi_index),
+                       "bucket %d stacks on lb %d",
+                       bucket,
+                       exp->bier.table);
+            break;
+       case FT_LB_BIER_FMASK:
+           FIB_TEST_LB((DPO_BIER_FMASK == dpo->dpoi_type),
+                        "bucket %d stacks on %U",
+                        bucket,
+                        format_dpo_type, dpo->dpoi_type);
+           FIB_TEST_LB((exp->bier.fmask == dpo->dpoi_index),
+                       "bucket %d stacks on lb %d",
                        bucket,
-                       exp->special.adj);
+                       exp->bier.fmask);
+            break;
+       case FT_LB_DROP:
+           FIB_TEST_LB((DPO_DROP == dpo->dpoi_type),
+                        "bucket %d stacks on %U",
+                        bucket,
+                        format_dpo_type, dpo->dpoi_type);
            break;
        }
     }
     return (!0);
 }
 
+int
+fib_test_validate_lb (const dpo_id_t *dpo,
+                     int n_buckets,
+                     ...)
+{
+    const load_balance_t *lb;
+    va_list ap;
+    int res;
+
+    va_start(ap, n_buckets);
+
+    if (FIB_TEST_I((DPO_LOAD_BALANCE == dpo->dpoi_type),
+                   "Entry links to %U",
+                   format_dpo_type, dpo->dpoi_type))
+    {
+        lb = load_balance_get(dpo->dpoi_index);
+
+        res = fib_test_validate_lb_v(lb, n_buckets, &ap);
+    }
+    else
+    {
+        res = !0;
+    }
+
+    va_end(ap);
+
+    return (res);
+}
+
 int
 fib_test_validate_entry (fib_node_index_t fei,
                         fib_forward_chain_type_t fct,
-                        u16 n_buckets,
+                        int n_buckets,
                         ...)
 {
     dpo_id_t dpo = DPO_INVALID;
@@ -647,18 +668,19 @@ fib_test_validate_entry (fib_node_index_t fei,
         const replicate_t *rep;
 
         rep = replicate_get(dpo.dpoi_index);
-        res = fib_test_validate_rep_v(rep, n_buckets, ap);
+        res = fib_test_validate_rep_v(rep, n_buckets, &ap);
     }
     else
     {
         const load_balance_t *lb;
 
         FIB_TEST_LB((DPO_LOAD_BALANCE == dpo.dpoi_type),
-                    "Entry links to %U",
+                    "%U Entry links to %U",
+                    format_fib_prefix, &pfx,
                     format_dpo_type, dpo.dpoi_type);
 
         lb = load_balance_get(dpo.dpoi_index);
-        res = fib_test_validate_lb_v(lb, n_buckets, ap);
+        res = fib_test_validate_lb_v(lb, n_buckets, &ap);
 
         /*
          * ensure that the LB contributed by the entry is the
@@ -691,7 +713,7 @@ fib_test_validate_entry (fib_node_index_t fei,
                 fw_lbi = 0;
             }
             FIB_TEST_LB((fw_lbi == dpo.dpoi_index),
-                        "Contributed LB = FW LB: %U\n %U",
+                        "Contributed LB = FW LB:\n fwd:%U\n cont:%U",
                         format_load_balance, fw_lbi, 0,
                         format_load_balance, dpo.dpoi_index, 0);
         }
@@ -729,13 +751,17 @@ fib_test_v4 (void)
        .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
     };
 
+    FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
+            pool_elts(load_balance_map_pool));
+
     tm = &test_main;
 
     /* record the nubmer of load-balances in use before we start */
     lb_count = pool_elts(load_balance_pool);
 
     /* Find or create FIB table 11 */
-    fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 11);
+    fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 11,
+                                                  FIB_SOURCE_API);
 
     for (ii = 0; ii < 4; ii++)
     {
@@ -803,7 +829,15 @@ fib_test_v4 (void)
      * table, and 4 path-lists in the v6 MFIB table
      */
 #define ENBR (5+5+2)
-#define PNBR (5+5+6)
+
+    u32 PNBR = 5+5+2+4;
+
+    /*
+     * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
+     */
+    if (vlib_get_plugin_symbol("igmp_plugin.so", "igmp_listen"))
+        PNBR += 2;
+
     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
             fib_path_list_pool_size());
@@ -829,7 +863,7 @@ fib_test_v4 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -843,7 +877,8 @@ fib_test_v4 (void)
             "Flags set on attached interface");
 
     ai = fib_entry_get_adj(fei);
-    FIB_TEST((FIB_NODE_INDEX_INVALID != ai), "attached interface route adj present");
+    FIB_TEST((FIB_NODE_INDEX_INVALID != ai),
+             "attached interface route adj present %d", ai);
     adj = adj_get(ai);
     FIB_TEST((IP_LOOKUP_NEXT_GLEAN == adj->lookup_next_index),
             "attached interface adj is glean");
@@ -856,7 +891,7 @@ fib_test_v4 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -906,7 +941,7 @@ fib_test_v4 (void)
     fib_table_entry_path_add(fib_index, &pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -958,7 +993,7 @@ fib_test_v4 (void)
     pfx.fp_len = 0;
     fib_table_entry_path_remove(fib_index, &pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0, // non-recursive path, so no FIB index
@@ -1024,7 +1059,7 @@ fib_test_v4 (void)
                                           &pfx_11_11_11_11_s_32,
                                           FIB_SOURCE_API,
                                           FIB_ENTRY_FLAG_ATTACHED,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                           &pfx_10_10_10_1_s_32.fp_addr,
                                           tm->hw[0]->sw_if_index,
                                           ~0, // invalid fib index
@@ -1086,26 +1121,26 @@ fib_test_v4 (void)
     /*
      * add the adj fib
      */
-    fei = fib_table_entry_update_one_path(fib_index,
-                                          &pfx_10_10_10_1_s_32,
-                                          FIB_SOURCE_ADJ,
-                                          FIB_ENTRY_FLAG_ATTACHED,
-                                         FIB_PROTOCOL_IP4,
-                                          &pfx_10_10_10_1_s_32.fp_addr,
-                                          tm->hw[0]->sw_if_index,
-                                          ~0, // invalid fib index
-                                          1,
-                                          NULL,
-                                          FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_10_10_10_1_s_32,
+                                   FIB_SOURCE_ADJ,
+                                   FIB_ENTRY_FLAG_ATTACHED,
+                                   DPO_PROTO_IP4,
+                                   &pfx_10_10_10_1_s_32.fp_addr,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0, // invalid fib index
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
     FIB_TEST((FIB_ENTRY_FLAG_ATTACHED  == fib_entry_get_flags(fei)),
             "Flags set on adj-fib");
     ai = fib_entry_get_adj(fei);
-    FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj");
+    FIB_TEST((ai_01 == ai), "ADJ-FIB resolves via adj, %d", ai);
 
     fib_table_entry_path_remove(fib_index,
                                 &pfx_11_11_11_11_s_32,
                                 FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                 &pfx_10_10_10_1_s_32.fp_addr,
                                 tm->hw[0]->sw_if_index,
                                 ~0, // invalid fib index
@@ -1135,17 +1170,17 @@ fib_test_v4 (void)
              "adj nbr next-hop ok");
     FIB_TEST((ai_01 != ai_02), "ADJs are different");
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_10_10_10_2_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_10_10_10_2_s_32.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_10_10_10_2_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_10_10_10_2_s_32.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup(fib_index, &pfx_10_10_10_2_s_32);
     ai = fib_entry_get_adj(fei);
@@ -1176,7 +1211,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_1_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -1209,7 +1244,7 @@ fib_test_v4 (void)
                             &pfx_1_1_2_0_s_24,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -1236,7 +1271,7 @@ fib_test_v4 (void)
                             &pfx_1_1_2_0_s_24,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_2,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -1275,7 +1310,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_2_0_s_24,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_2,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -1322,7 +1357,7 @@ fib_test_v4 (void)
                                   &bgp_100_pfx,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &nh_1_1_1_1,
                                   ~0, // no index provided.
                                   fib_index, // nexthop in same fib as route
@@ -1358,7 +1393,7 @@ fib_test_v4 (void)
                             &bgp_101_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_1_1_1_1,
                             ~0, // no index provided.
                             fib_index, // nexthop in same fib as route
@@ -1478,19 +1513,20 @@ fib_test_v4 (void)
        },
     };
 
-    fib_table_entry_path_add(fib_index,
-                            &bgp_200_pfx,
-                            FIB_SOURCE_API,
-                            FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
-                            &pfx_1_1_1_2_s_32.fp_addr,
-                            ~0, // no index provided.
-                            fib_index, // nexthop in same fib as route
-                            1,
-                            NULL,
-                            FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_path_add(fib_index,
+                                   &bgp_200_pfx,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &pfx_1_1_1_2_s_32.fp_addr,
+                                   ~0, // no index provided.
+                                   fib_index, // nexthop in same fib as route
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
 
-    FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "Recursive via unresolved is drop");
 
     /*
      * the adj should be recursive via drop, since the route resolves via
@@ -1528,7 +1564,7 @@ fib_test_v4 (void)
                             &pfx_1_2_3_4_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                              &nh_10_10_10_1,
                              tm->hw[0]->sw_if_index,
                              ~0,
@@ -1539,7 +1575,7 @@ fib_test_v4 (void)
                                    &pfx_1_2_3_4_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                    &nh_12_12_12_12,
                                    tm->hw[1]->sw_if_index,
                                    ~0,
@@ -1580,7 +1616,7 @@ fib_test_v4 (void)
                             &pfx_1_2_3_5_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                              &nh_12_12_12_12,
                              tm->hw[1]->sw_if_index,
                              ~0,
@@ -1591,7 +1627,7 @@ fib_test_v4 (void)
                                    &pfx_1_2_3_5_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    tm->hw[0]->sw_if_index,
                                    ~0,
@@ -1641,13 +1677,13 @@ fib_test_v4 (void)
            .ip4.as_u32 = clib_host_to_net_u32(0x06060606),
        },
     };
-    fib_test_lb_bucket_t ip_6_6_6_6_o_10_10_10_1 = {
+    fib_test_lb_bucket_t ip_o_10_10_10_1 = {
        .type = FT_LB_ADJ,
        .adj = {
            .adj = ai_01,
        },
     };
-    fib_test_lb_bucket_t ip_6_6_6_6_o_10_10_10_2 = {
+    fib_test_lb_bucket_t ip_o_10_10_10_2 = {
         .type = FT_LB_ADJ,
         .adj = {
             .adj = ai_02,
@@ -1663,7 +1699,7 @@ fib_test_v4 (void)
                                    &pfx_6_6_6_6_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -1675,14 +1711,14 @@ fib_test_v4 (void)
     FIB_TEST(fib_test_validate_entry(fei,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     1,
-                                    &ip_6_6_6_6_o_10_10_10_1),
+                                    &ip_o_10_10_10_1),
             "6.6.6.6/32 via 10.10.10.1");
 
     fib_table_entry_path_add(fib_index,
                              &pfx_6_6_6_6_s_32,
                              FIB_SOURCE_API,
                              FIB_ENTRY_FLAG_NONE,
-                             FIB_PROTOCOL_IP4,
+                             DPO_PROTO_IP4,
                              &nh_10_10_10_2,
                              tm->hw[0]->sw_if_index,
                              ~0, // invalid fib index
@@ -1694,77 +1730,77 @@ fib_test_v4 (void)
     FIB_TEST(fib_test_validate_entry(fei,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     64,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_1),
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_1),
             "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
 
     fib_table_entry_path_add(fib_index,
                              &pfx_6_6_6_6_s_32,
                              FIB_SOURCE_API,
                              FIB_ENTRY_FLAG_NONE,
-                             FIB_PROTOCOL_IP4,
+                             DPO_PROTO_IP4,
                              &nh_12_12_12_12,
                              tm->hw[1]->sw_if_index,
                              ~0, // invalid fib index
@@ -1776,71 +1812,71 @@ fib_test_v4 (void)
     FIB_TEST(fib_test_validate_entry(fei,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     128,
-                                    &ip_6_6_6_6_o_10_10_10_1,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
+                                    &ip_o_10_10_10_1,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
                                     &ip_6_6_6_6_o_12_12_12_12,
                                     &ip_6_6_6_6_o_12_12_12_12,
                                     &ip_6_6_6_6_o_12_12_12_12,
@@ -1909,7 +1945,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                 &pfx_6_6_6_6_s_32,
                                 FIB_SOURCE_API,
-                                FIB_PROTOCOL_IP4,
+                                DPO_PROTO_IP4,
                                 &nh_12_12_12_12,
                                 tm->hw[1]->sw_if_index,
                                 ~0, // invalid fib index
@@ -1920,76 +1956,76 @@ fib_test_v4 (void)
     FIB_TEST(fib_test_validate_entry(fei,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     64,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_2,
-                                    &ip_6_6_6_6_o_10_10_10_1),
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_2,
+                                    &ip_o_10_10_10_1),
             "6.6.6.6/32 via 10.10.10.1 and 10.10.10.2 in 63:1 ratio");
 
     fib_table_entry_path_remove(fib_index,
                                 &pfx_6_6_6_6_s_32,
                                 FIB_SOURCE_API,
-                                FIB_PROTOCOL_IP4,
+                                DPO_PROTO_IP4,
                                 &nh_10_10_10_2,
                                 tm->hw[0]->sw_if_index,
                                 ~0, // invalid fib index
@@ -2000,7 +2036,7 @@ fib_test_v4 (void)
     FIB_TEST(fib_test_validate_entry(fei,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     1,
-                                    &ip_6_6_6_6_o_10_10_10_1),
+                                    &ip_o_10_10_10_1),
             "6.6.6.6/32 via 10.10.10.1");
 
     fib_table_entry_delete(fib_index, &pfx_6_6_6_6_s_32, FIB_SOURCE_API);
@@ -2020,7 +2056,7 @@ fib_test_v4 (void)
                                    &bgp_44_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &pfx_1_2_3_4_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -2031,7 +2067,7 @@ fib_test_v4 (void)
                                    &bgp_44_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &pfx_1_2_3_5_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -2097,19 +2133,20 @@ fib_test_v4 (void)
        },
     };
 
-    fib_table_entry_path_add(fib_index,
-                            &bgp_201_pfx,
-                            FIB_SOURCE_API,
-                            FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
-                            &pfx_1_1_1_200_s_32.fp_addr,
-                            ~0, // no index provided.
-                            fib_index, // nexthop in same fib as route
-                            1,
-                            NULL,
-                            FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_path_add(fib_index,
+                                   &bgp_201_pfx,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &pfx_1_1_1_200_s_32.fp_addr,
+                                   ~0, // no index provided.
+                                   fib_index, // nexthop in same fib as route
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
 
-    FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "Recursive via unresolved is drop");
 
     fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
     FIB_TEST((FIB_ENTRY_FLAG_NONE == fib_entry_get_flags(fei)),
@@ -2144,7 +2181,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_0_s_24,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -2202,7 +2239,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_0_s_28,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_2,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -2237,7 +2274,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_0_s_28,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_2,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -2268,7 +2305,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_0_s_24,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -2281,12 +2318,16 @@ fib_test_v4 (void)
     fei = fib_table_lookup(fib_index, &pfx_1_1_1_2_s_32);
     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
             "1.1.1.2/32 route is DROP");
-    fei = fib_table_lookup(fib_index, &pfx_1_1_1_200_s_32);
+    fei = fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_200_s_32);
     FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
             "1.1.1.200/32 route is DROP");
 
-    FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
-    FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
+    fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "201 is drop");
+    fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "200 is drop");
 
     /*
      * -1 entry
@@ -2305,7 +2346,7 @@ fib_test_v4 (void)
                                   &pfx_1_1_1_2_s_32,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &nh_10_10_10_1,
                                   tm->hw[0]->sw_if_index,
                                   ~0, // invalid fib index
@@ -2316,7 +2357,9 @@ fib_test_v4 (void)
     ai = fib_entry_get_adj(fei);
     FIB_TEST((ai = ai_01), "1.1.1.2/32 resolves via 10.10.10.1");
 
-    FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_200_s_32, 0);
+    fei = fib_table_lookup_exact_match(fib_index, &bgp_201_pfx);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "201 is drop");
     FIB_TEST_REC_FORW(&bgp_200_pfx, &pfx_1_1_1_2_s_32, 0);
 
     /*
@@ -2329,13 +2372,40 @@ fib_test_v4 (void)
     FIB_TEST((ENBR+12 == fib_entry_pool_size()), "entry pool size is %d",
             fib_entry_pool_size());
 
+    /*
+     * give 201 a resolved path.
+     *  it now has the unresolved 1.1.1.200 and the resolved 1.1.1.2,
+     *  only the latter contributes forwarding.
+     */
+    fei = fib_table_entry_path_add(fib_index,
+                                   &bgp_201_pfx,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &pfx_1_1_1_2_s_32.fp_addr,
+                                   ~0,
+                                   fib_index,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    FIB_TEST_REC_FORW(&bgp_201_pfx, &pfx_1_1_1_2_s_32, 0);
+    fib_table_entry_path_remove(fib_index,
+                                &bgp_201_pfx,
+                                FIB_SOURCE_API,
+                                DPO_PROTO_IP4,
+                                &pfx_1_1_1_2_s_32.fp_addr,
+                                ~0,
+                                fib_index,
+                                1,
+                                FIB_ROUTE_PATH_FLAG_NONE);
+
     /*
      * remove 200.200.200.201/32 which does not have a valid via FIB
      */
     fib_table_entry_path_remove(fib_index,
                                &bgp_201_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_200_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index,
@@ -2365,7 +2435,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_200_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_2_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index,
@@ -2406,7 +2476,7 @@ fib_test_v4 (void)
                             &bgp_102,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_1_1_1_1_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index, // same as route
@@ -2417,7 +2487,7 @@ fib_test_v4 (void)
                             &bgp_102,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_1_1_1_2_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index, // same as route's FIB
@@ -2443,7 +2513,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_102,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_1_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2452,7 +2522,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_102,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_2_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2467,7 +2537,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_100_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_1_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2476,7 +2546,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_101_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_1_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2506,7 +2576,7 @@ fib_test_v4 (void)
                             &bgp_200_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             ~0, // no index provided.
                             fib_index, // Same as route's FIB
@@ -2553,7 +2623,7 @@ fib_test_v4 (void)
                             &bgp_201_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_3,
                             ~0, // no index provided.
                             fib_index,
@@ -2599,7 +2669,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_200_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2608,7 +2678,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_201_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_3,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2667,7 +2737,7 @@ fib_test_v4 (void)
                             &pfx_5_5_5_5_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_5_5_5_6_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index,
@@ -2678,7 +2748,7 @@ fib_test_v4 (void)
                             &pfx_5_5_5_6_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_5_5_5_7_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index,
@@ -2689,7 +2759,7 @@ fib_test_v4 (void)
                             &pfx_5_5_5_7_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_5_5_5_5_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index,
@@ -2728,7 +2798,7 @@ fib_test_v4 (void)
                             &pfx_5_5_5_6_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -2761,7 +2831,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_6_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -2786,7 +2856,7 @@ fib_test_v4 (void)
                                    &pfx_5_5_5_5_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -2828,7 +2898,7 @@ fib_test_v4 (void)
                                    &pfx_5_5_5_5_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_5_5_5_6_s_32.fp_addr,
                                    ~0, // no index provided.
                                    fib_index,
@@ -2852,7 +2922,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_5_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_5_5_5_6_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2861,7 +2931,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_6_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_5_5_5_7_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2870,7 +2940,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_7_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_5_5_5_5_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2879,7 +2949,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_6_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_2,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2903,7 +2973,7 @@ fib_test_v4 (void)
                             &pfx_5_5_5_6_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_5_5_5_6_s_32.fp_addr,
                             ~0, // no index provided.
                             fib_index,
@@ -2917,7 +2987,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_5_5_5_6_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_5_5_5_6_s_32.fp_addr,
                                ~0, // no index provided.
                                fib_index, // same as route's FIB
@@ -2951,7 +3021,7 @@ fib_test_v4 (void)
                                   &pfx_23_23_23_0_s_24,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &pfx_23_23_23_23_s_32.fp_addr,
                                   ~0, // recursive
                                   fib_index,
@@ -2973,6 +3043,36 @@ fib_test_v4 (void)
     FIB_TEST((ENBR+7 == fib_entry_pool_size()), "entry pool size is %d",
             fib_entry_pool_size());
 
+    /*
+     * Make the default route recursive via a unknown next-hop. Thus the
+     * next hop's cover would be the default route
+     */
+    fei = fib_table_entry_path_add(fib_index,
+                                  &pfx_0_0_0_0_s_0,
+                                  FIB_SOURCE_API,
+                                  FIB_ENTRY_FLAG_NONE,
+                                  DPO_PROTO_IP4,
+                                  &pfx_23_23_23_23_s_32.fp_addr,
+                                  ~0, // recursive
+                                  fib_index,
+                                  1,
+                                  NULL,
+                                  FIB_ROUTE_PATH_FLAG_NONE);
+    dpo = fib_entry_contribute_ip_forwarding(fei);
+    FIB_TEST(load_balance_is_drop(dpo),
+            "0.0.0.0.0/0 via is DROP");
+    FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
+             "no resolving interface for looped 0.0.0.0/0");
+
+    fei = fib_table_lookup_exact_match(fib_index, &pfx_23_23_23_23_s_32);
+    dpo = fib_entry_contribute_ip_forwarding(fei);
+    FIB_TEST(load_balance_is_drop(dpo),
+            "23.23.23.23/32 via is DROP");
+    FIB_TEST((fib_entry_get_resolving_interface(fei) == ~0),
+             "no resolving interface for looped 23.23.23.23/32");
+
+    fib_table_entry_delete(fib_index, &pfx_0_0_0_0_s_0, FIB_SOURCE_API);
+
     /*
      * A recursive route with recursion constraints.
      *  200.200.200.200/32 via 1.1.1.1 is recurse via host constrained
@@ -2981,7 +3081,7 @@ fib_test_v4 (void)
                             &bgp_200_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_1_1_1_1,
                             ~0,
                             fib_index,
@@ -3011,7 +3111,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_0_s_28,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -3029,7 +3129,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0, // invalid fib index
@@ -3046,7 +3146,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_1_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -3070,7 +3170,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_3_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_2,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -3082,7 +3182,7 @@ fib_test_v4 (void)
                             &bgp_200_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &pfx_1_1_1_3_s_32.fp_addr,
                             ~0,
                             fib_index,
@@ -3090,6 +3190,43 @@ fib_test_v4 (void)
                             NULL,
                             FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
 
+    /*
+     * add a bunch load more entries using this path combo so that we get
+     * an LB-map created.
+     */
+#define N_P 128
+    fib_prefix_t bgp_78s[N_P];
+    for (ii = 0; ii < N_P; ii++)
+    {
+        bgp_78s[ii].fp_len = 32;
+        bgp_78s[ii].fp_proto = FIB_PROTOCOL_IP4;
+        bgp_78s[ii].fp_addr.ip4.as_u32 = clib_host_to_net_u32(0x4e000000+ii);
+
+        
+        fib_table_entry_path_add(fib_index,
+                                 &bgp_78s[ii],
+                                 FIB_SOURCE_API,
+                                 FIB_ENTRY_FLAG_NONE,
+                                 DPO_PROTO_IP4,
+                                 &pfx_1_1_1_3_s_32.fp_addr,
+                                 ~0,
+                                 fib_index,
+                                 1,
+                                 NULL,
+                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
+        fib_table_entry_path_add(fib_index,
+                                 &bgp_78s[ii],
+                                 FIB_SOURCE_API,
+                                 FIB_ENTRY_FLAG_NONE,
+                                 DPO_PROTO_IP4,
+                                 &nh_1_1_1_1,
+                                 ~0,
+                                 fib_index,
+                                 1,
+                                 NULL,
+                                 FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
+    }
+
     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
     dpo = fib_entry_contribute_ip_forwarding(fei);
 
@@ -3131,13 +3268,16 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0, // invalid fib index
                                1,
                                FIB_ROUTE_PATH_FLAG_NONE);
 
+    /* suspend so the update walk kicks int */
+    vlib_process_suspend(vlib_get_main(), 1e-5);
+
     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
     FIB_TEST(!dpo_cmp(dpo, fib_entry_contribute_ip_forwarding(fei)),
             "post PIC 200.200.200.200/32 was inplace modified");
@@ -3167,7 +3307,7 @@ fib_test_v4 (void)
                             &pfx_1_1_1_1_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -3175,6 +3315,9 @@ fib_test_v4 (void)
                             NULL,
                             FIB_ROUTE_PATH_FLAG_NONE);
 
+    /* suspend so the update walk kicks in */
+    vlib_process_suspend(vlib_get_main(), 1e-5);
+
     FIB_TEST(!dpo_cmp(dpo2, load_balance_get_bucket_i(lb, 0)),
             "post PIC recovery adj for 200.200.200.200/32 is recursive "
             "via adj for 1.1.1.1");
@@ -3194,13 +3337,27 @@ fib_test_v4 (void)
                             &bgp_200_pfx,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
+                            &pfx_1_1_1_2_s_32.fp_addr,
+                            ~0,
+                            fib_index,
+                            1,
+                            NULL,
+                            FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
+    for (ii = 0; ii < N_P; ii++)
+    {
+        fib_table_entry_path_add(fib_index,
+                                 &bgp_78s[ii],
+                            FIB_SOURCE_API,
+                            FIB_ENTRY_FLAG_NONE,
+                            DPO_PROTO_IP4,
                             &pfx_1_1_1_2_s_32.fp_addr,
                             ~0,
                             fib_index,
                             1,
                             NULL,
                             FIB_ROUTE_PATH_RESOLVE_VIA_HOST);
+    }
 
     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
     dpo = fib_entry_contribute_ip_forwarding(fei);
@@ -3227,12 +3384,14 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
                                1,
                                FIB_ROUTE_PATH_FLAG_NONE);
+    /* suspend so the update walk kicks int */
+    vlib_process_suspend(vlib_get_main(), 1e-5);
 
     fei = fib_table_lookup_exact_match(fib_index, &bgp_200_pfx);
     dpo = fib_entry_contribute_ip_forwarding(fei);
@@ -3262,7 +3421,7 @@ fib_test_v4 (void)
                              &pfx_1_1_1_1_s_32,
                              FIB_SOURCE_API,
                              FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                              &nh_10_10_10_1,
                              tm->hw[0]->sw_if_index,
                              ~0,
@@ -3270,10 +3429,20 @@ fib_test_v4 (void)
                              NULL,
                              FIB_ROUTE_PATH_FLAG_NONE);
 
+    for (ii = 0; ii < N_P; ii++)
+    {
+        fib_table_entry_delete(fib_index,
+                               &bgp_78s[ii],
+                               FIB_SOURCE_API);
+        FIB_TEST((FIB_NODE_INDEX_INVALID ==
+                  fib_table_lookup_exact_match(fib_index, &bgp_78s[ii])),
+                 "%U removed",
+                 format_fib_prefix, &bgp_78s[ii]);
+    }
     fib_table_entry_path_remove(fib_index,
                                 &bgp_200_pfx,
                                 FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                 &pfx_1_1_1_2_s_32.fp_addr,
                                 ~0,
                                 fib_index,
@@ -3282,7 +3451,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_200_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_1_1_1_1,
                                ~0,
                                fib_index,
@@ -3291,7 +3460,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &bgp_200_pfx,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &pfx_1_1_1_3_s_32.fp_addr,
                                ~0,
                                fib_index,
@@ -3303,6 +3472,8 @@ fib_test_v4 (void)
     fib_table_entry_delete(fib_index,
                           &pfx_1_1_1_0_s_28,
                           FIB_SOURCE_API);
+    /* suspend so the update walk kicks int */
+    vlib_process_suspend(vlib_get_main(), 1e-5);
     FIB_TEST((FIB_NODE_INDEX_INVALID ==
              fib_table_lookup_exact_match(fib_index, &pfx_1_1_1_0_s_28)),
             "1.1.1.1/28 removed");
@@ -3340,7 +3511,7 @@ fib_test_v4 (void)
                             &pfx_4_4_4_4_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -3351,7 +3522,7 @@ fib_test_v4 (void)
                             &pfx_4_4_4_4_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_2,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -3362,7 +3533,7 @@ fib_test_v4 (void)
                             &pfx_4_4_4_4_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_3,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -3398,7 +3569,7 @@ fib_test_v4 (void)
     for (ii = 0; ii < 4; ii++)
     {
        fib_route_path_t r_path = {
-           .frp_proto = FIB_PROTOCOL_IP4,
+           .frp_proto = DPO_PROTO_IP4,
            .frp_addr = {
                .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02 + ii),
            },
@@ -3447,7 +3618,7 @@ fib_test_v4 (void)
                             &pfx_4_4_4_4_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &zero_addr,
                             ~0,
                             fib_index,
@@ -3466,6 +3637,49 @@ fib_test_v4 (void)
             "4.4.4.4/32 is deag in %d %U",
              lkd->lkd_fib_index,
              format_dpo_id, dpo, 0);
+    FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
+            "4.4.4.4/32 is source deag in %d %U",
+             lkd->lkd_input,
+             format_dpo_id, dpo, 0);
+
+    fib_table_entry_delete(fib_index,
+                          &pfx_4_4_4_4_s_32,
+                          FIB_SOURCE_API);
+    FIB_TEST(FIB_NODE_INDEX_INVALID ==
+            fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32),
+            "4.4.4.4/32 removed");
+    vec_free(r_paths);
+
+    /*
+     * A route deag route in a source lookup table
+     */
+    fib_table_entry_path_add(fib_index,
+                            &pfx_4_4_4_4_s_32,
+                            FIB_SOURCE_API,
+                            FIB_ENTRY_FLAG_NONE,
+                            DPO_PROTO_IP4,
+                            &zero_addr,
+                            ~0,
+                            fib_index,
+                            1,
+                            NULL,
+                            FIB_ROUTE_PATH_SOURCE_LOOKUP);
+
+    fei = fib_table_lookup_exact_match(fib_index, &pfx_4_4_4_4_s_32);
+    FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "4.4.4.4/32 present");
+
+    dpo = fib_entry_contribute_ip_forwarding(fei);
+    dpo = load_balance_get_bucket(dpo->dpoi_index, 0);
+    lkd = lookup_dpo_get(dpo->dpoi_index);
+
+    FIB_TEST((fib_index == lkd->lkd_fib_index),
+            "4.4.4.4/32 is deag in %d %U",
+             lkd->lkd_fib_index,
+             format_dpo_id, dpo, 0);
+    FIB_TEST((LOOKUP_INPUT_SRC_ADDR == lkd->lkd_input),
+            "4.4.4.4/32 is source deag in %d %U",
+             lkd->lkd_input,
+             format_dpo_id, dpo, 0);
 
     fib_table_entry_delete(fib_index,
                           &pfx_4_4_4_4_s_32,
@@ -3503,11 +3717,22 @@ fib_test_v4 (void)
            .ip4.as_u32 = clib_host_to_net_u32(0x22220101),
        },
     };
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_34_34_1_1_s_32,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
     fei = fib_table_entry_path_add(fib_index,
                                    &pfx_34_1_1_1_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_34_34_1_1_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -3518,7 +3743,7 @@ fib_test_v4 (void)
                                    &pfx_34_1_1_1_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_34_34_1_1_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -3527,6 +3752,9 @@ fib_test_v4 (void)
                                    FIB_ROUTE_PATH_FLAG_NONE);
     FIB_TEST_REC_FORW(&pfx_34_1_1_1_s_32, &pfx_34_34_1_1_s_32, 0);
     fib_table_entry_delete_index(fei, FIB_SOURCE_API);
+    fib_table_entry_delete(fib_index,
+                           &pfx_34_34_1_1_s_32,
+                           FIB_SOURCE_API);
 
     /*
      * CLEANUP
@@ -3536,7 +3764,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_2_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -3545,7 +3773,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -3554,7 +3782,7 @@ fib_test_v4 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_2_0_s_24,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -3596,7 +3824,7 @@ fib_test_v4 (void)
                             &pfx_4_1_1_1_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &zero_addr,
                             tm->hw[0]->sw_if_index,
                             fib_index,
@@ -3650,7 +3878,7 @@ fib_test_v4 (void)
                                   &pfx_2001_s_64,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &nh_10_10_10_1,
                                   tm->hw[0]->sw_if_index,
                                   fib_index,
@@ -3704,17 +3932,17 @@ fib_test_v4 (void)
        },
     };
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_12_10_10_2_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_12_10_10_2_s_32.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_12_10_10_2_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_12_10_10_2_s_32.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup_exact_match(fib_index, &pfx_12_10_10_2_s_32);
     dpo = fib_entry_contribute_ip_forwarding(fei);
@@ -3738,17 +3966,17 @@ fib_test_v4 (void)
        },
     };
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_10_10_10_127_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_10_10_10_127_s_32.fp_addr,
-                                   tm->hw[1]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_10_10_10_127_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_10_10_10_127_s_32.fp_addr,
+                             tm->hw[1]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_127_s_32);
     dpo = fib_entry_contribute_ip_forwarding(fei);
@@ -3759,6 +3987,196 @@ fib_test_v4 (void)
                           &pfx_10_10_10_127_s_32,
                           FIB_SOURCE_ADJ);
 
+    /*
+     * add a second path to an adj-fib
+     * this is a sumiluation of another ARP entry created
+     * on an interface on which the connected prefi does not exist.
+     * The second path fails refinement. Expect to forward through the
+     * first.
+     */
+    fib_prefix_t pfx_10_10_10_3_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = {
+            /* 10.10.10.3 */
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a03),
+        },
+    };
+
+    ai_03 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                VNET_LINK_IP4,
+                                &nh_10_10_10_3,
+                                tm->hw[0]->sw_if_index);
+
+    fib_test_lb_bucket_t ip_o_10_10_10_3 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_03,
+        },
+    };
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_10_10_10_3_s_32,
+                                   FIB_SOURCE_ADJ,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &nh_10_10_10_3,
+                                   tm->hw[0]->sw_if_index,
+                                   fib_index,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_10_10_10_3_s_32,
+                                   FIB_SOURCE_ADJ,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &nh_12_12_12_12,
+                                   tm->hw[1]->sw_if_index,
+                                   fib_index,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     1,
+                                     &ip_o_10_10_10_3),
+             "10.10.10.3 via 10.10.10.3/Eth0 only");
+
+    /*
+     * remove the path that refines the cover, should go unresolved
+     */
+    fib_table_entry_path_remove(fib_index,
+                                &pfx_10_10_10_3_s_32,
+                                FIB_SOURCE_ADJ,
+                                DPO_PROTO_IP4,
+                                &nh_10_10_10_3,
+                                tm->hw[0]->sw_if_index,
+                                fib_index,
+                                1,
+                                FIB_ROUTE_PATH_FLAG_NONE);
+    dpo = fib_entry_contribute_ip_forwarding(fei);
+    FIB_TEST(!dpo_id_is_valid(dpo),
+             "wrong interface adj-fib fails refinement");
+
+    /*
+     * add back the path that refines the cover
+     */
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_10_10_10_3_s_32,
+                                   FIB_SOURCE_ADJ,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &nh_10_10_10_3,
+                                   tm->hw[0]->sw_if_index,
+                                   fib_index,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     1,
+                                     &ip_o_10_10_10_3),
+             "10.10.10.3 via 10.10.10.3/Eth0 only");
+
+    /*
+     * remove the path that does not refine the cover
+     */
+    fib_table_entry_path_remove(fib_index,
+                                &pfx_10_10_10_3_s_32,
+                                FIB_SOURCE_ADJ,
+                                DPO_PROTO_IP4,
+                                &nh_12_12_12_12,
+                                tm->hw[1]->sw_if_index,
+                                fib_index,
+                                1,
+                                FIB_ROUTE_PATH_FLAG_NONE);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     1,
+                                     &ip_o_10_10_10_3),
+             "10.10.10.3 via 10.10.10.3/Eth0 only");
+
+    /*
+     * remove the path that does refine, it's the last path, so
+     * the entry should be gone
+     */
+    fib_table_entry_path_remove(fib_index,
+                                &pfx_10_10_10_3_s_32,
+                                FIB_SOURCE_ADJ,
+                                DPO_PROTO_IP4,
+                                &nh_10_10_10_3,
+                                tm->hw[0]->sw_if_index,
+                                fib_index,
+                                1,
+                                FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
+    FIB_TEST((fei == FIB_NODE_INDEX_INVALID), "10.10.10.3 gone");
+
+    adj_unlock(ai_03);
+
+    /*
+     * change the table's flow-hash config - expect the update to propagete to
+     * the entries' load-balance objects
+     */
+    flow_hash_config_t old_hash_config, new_hash_config;
+
+    old_hash_config = fib_table_get_flow_hash_config(fib_index,
+                                                     FIB_PROTOCOL_IP4);
+    new_hash_config = (IP_FLOW_HASH_SRC_ADDR |
+                       IP_FLOW_HASH_DST_ADDR);
+
+    fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
+    dpo = fib_entry_contribute_ip_forwarding(fei);
+    lb = load_balance_get(dpo->dpoi_index);
+    FIB_TEST((lb->lb_hash_config == old_hash_config),
+             "Table and LB hash config match: %U",
+             format_ip_flow_hash_config, lb->lb_hash_config);
+
+    fib_table_set_flow_hash_config(fib_index, FIB_PROTOCOL_IP4, new_hash_config);
+
+    FIB_TEST((lb->lb_hash_config == new_hash_config),
+             "Table and LB newhash config match: %U",
+             format_ip_flow_hash_config, lb->lb_hash_config);
+
+    /*
+     * A route via DVR DPO
+     */
+    fei = fib_table_entry_path_add(fib_index,
+                                   &pfx_10_10_10_3_s_32,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                   &zero_addr,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_DVR);
+    dpo_id_t dvr_dpo = DPO_INVALID;
+    dvr_dpo_add_or_lock(tm->hw[0]->sw_if_index, DPO_PROTO_IP4, &dvr_dpo);
+    fib_test_lb_bucket_t ip_o_l2 = {
+        .type = FT_LB_L2,
+        .adj = {
+            .adj = dvr_dpo.dpoi_index,
+        },
+    };
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     1,
+                                     &ip_o_l2),
+             "10.10.10.3 via L2 on Eth0");
+    fib_table_entry_path_remove(fib_index,
+                                &pfx_10_10_10_3_s_32,
+                                FIB_SOURCE_API,
+                                DPO_PROTO_IP4,
+                                &zero_addr,
+                                tm->hw[0]->sw_if_index,
+                                fib_index,
+                                1,
+                                FIB_ROUTE_PATH_DVR);
+    dpo_reset(&dvr_dpo);
+
     /*
      * CLEANUP
      *    remove adj-fibs: 
@@ -3821,7 +4239,7 @@ fib_test_v4 (void)
     /*
      * -2 entries and -2 non-shared path-list
      */
-    FIB_TEST((0  == fib_path_list_db_size()),   "path list DB population:%d",
+    FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
             fib_path_list_db_size());
     FIB_TEST((PNBR == fib_path_list_pool_size()), "path list pool size is %d",
             fib_path_list_pool_size());
@@ -3844,7 +4262,7 @@ fib_test_v4 (void)
                                              FIB_SOURCE_INTERFACE)),
              "NO INterface Source'd prefixes");
 
-    fib_table_unlock(fib_index, FIB_PROTOCOL_IP4);
+    fib_table_unlock(fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_API);
 
     FIB_TEST((0  == fib_path_list_db_size()), "path list DB population:%d",
             fib_path_list_db_size());
@@ -3855,9 +4273,11 @@ fib_test_v4 (void)
     FIB_TEST((ENBR-5 == pool_elts(fib_urpf_list_pool)), "uRPF pool size is %d",
             pool_elts(fib_urpf_list_pool));
     FIB_TEST((0 == pool_elts(load_balance_map_pool)), "LB-map pool size is %d",
-             pool_elts(load_balance_map_pool));
+            pool_elts(load_balance_map_pool));
     FIB_TEST((lb_count == pool_elts(load_balance_pool)), "LB pool size is %d",
              pool_elts(load_balance_pool));
+    FIB_TEST((0 == pool_elts(dvr_dpo_pool)), "L2 DPO pool size is %d",
+             pool_elts(dvr_dpo_pool));
 
     return 0;
 }
@@ -3895,7 +4315,8 @@ fib_test_v6 (void)
     dpo_drop = drop_dpo_get(DPO_PROTO_IP6);
 
     /* Find or create FIB table 11 */
-    fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6, 11);
+    fib_index = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP6, 11,
+                                                  FIB_SOURCE_API);
 
     for (ii = 0; ii < 4; ii++)
     {
@@ -3932,7 +4353,13 @@ fib_test_v6 (void)
      * All entries are special so no path-list sharing.
      */
 #define ENPS (5+4)
-#define PNPS (5+4+4)
+    u32 PNPS = (5+4+4);
+    /*
+     * if the IGMP plugin is loaded this adds two more entries to the v4 MFIB
+     */
+    if (vlib_get_plugin_symbol("igmp_plugin.so", "igmp_listen"))
+        PNPS += 2;
+
     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB is empty");
     FIB_TEST((PNPS == fib_path_list_pool_size()), "path list pool size is %d",
             fib_path_list_pool_size());
@@ -3963,7 +4390,7 @@ fib_test_v6 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP6,
+                                   DPO_PROTO_IP6,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0,
@@ -3994,7 +4421,7 @@ fib_test_v6 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP6,
+                                   DPO_PROTO_IP6,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -4039,7 +4466,7 @@ fib_test_v6 (void)
     fib_table_entry_path_add(fib_index, &pfx_0_0,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP6,
+                            DPO_PROTO_IP6,
                             &nh_2001_2,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -4083,7 +4510,7 @@ fib_test_v6 (void)
      */
     fib_table_entry_path_remove(fib_index, &pfx_0_0,
                                FIB_SOURCE_API, 
-                               FIB_PROTOCOL_IP6,
+                               DPO_PROTO_IP6,
                                &nh_2001_2,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -4156,17 +4583,17 @@ fib_test_v6 (void)
                                    &adj->sub_type.nbr.next_hop)),
              "adj nbr next-hop ok");
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_2001_1_2_s_128,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP6,
-                                   &pfx_2001_1_2_s_128.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0,
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_2001_1_2_s_128,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP6,
+                             &pfx_2001_1_2_s_128.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0,
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup(fib_index, &pfx_2001_1_2_s_128);
     ai = fib_entry_get_adj(fei);
@@ -4195,17 +4622,17 @@ fib_test_v6 (void)
              "adj nbr next-hop ok");
     FIB_TEST((ai_01 != ai_02), "ADJs are different");
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_2001_1_3_s_128,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP6,
-                                   &pfx_2001_1_3_s_128.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0,
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_2001_1_3_s_128,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP6,
+                             &pfx_2001_1_3_s_128.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0,
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup(fib_index, &pfx_2001_1_3_s_128);
     ai = fib_entry_get_adj(fei);
@@ -4253,7 +4680,7 @@ fib_test_v6 (void)
                             &pfx_2001_a_s_64,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP6,
+                            DPO_PROTO_IP6,
                             &nh_2001_2,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -4267,7 +4694,7 @@ fib_test_v6 (void)
                             &pfx_2001_b_s_64,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP6,
+                            DPO_PROTO_IP6,
                             &nh_2001_2,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -4302,7 +4729,7 @@ fib_test_v6 (void)
                                   &pfx_1_1_1_1_s_32,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP6,
+                                  DPO_PROTO_IP6,
                                   &nh_2001_2,
                                   tm->hw[0]->sw_if_index,
                                   ~0,
@@ -4340,7 +4767,7 @@ fib_test_v6 (void)
                             &pfx_2001_c_s_64,
                             FIB_SOURCE_CLI,
                             FIB_ENTRY_FLAG_ATTACHED,
-                            FIB_PROTOCOL_IP6,
+                            DPO_PROTO_IP6,
                             NULL,
                             tm->hw[0]->sw_if_index,
                             ~0,
@@ -4357,7 +4784,7 @@ fib_test_v6 (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_2001_c_s_64,
                                FIB_SOURCE_CLI,
-                               FIB_PROTOCOL_IP6,
+                               DPO_PROTO_IP6,
                                NULL,
                                tm->hw[0]->sw_if_index,
                                ~0,
@@ -4442,7 +4869,7 @@ fib_test_v6 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP6,
+                                   DPO_PROTO_IP6,
                                    NULL,
                                    tm->hw[1]->sw_if_index,
                                    ~0,
@@ -4461,7 +4888,7 @@ fib_test_v6 (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP6,
+                                   DPO_PROTO_IP6,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -4719,7 +5146,7 @@ fib_test_v6 (void)
     /*
      * now remove the VRF
      */
-    fib_table_unlock(fib_index, FIB_PROTOCOL_IP6);
+    fib_table_unlock(fib_index, FIB_PROTOCOL_IP6, FIB_SOURCE_API);
 
     FIB_TEST((0 == fib_path_list_db_size()),   "path list DB population:%d",
             fib_path_list_db_size());
@@ -4789,7 +5216,7 @@ fib_test_ae (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0,
@@ -4805,7 +5232,7 @@ fib_test_ae (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -4830,17 +5257,17 @@ fib_test_ae (void)
     };
     fib_node_index_t ai;
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_10_10_10_1_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_10_10_10_1_s_32.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_10_10_10_1_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_10_10_10_1_s_32.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     fei = fib_table_lookup(fib_index, &pfx_10_10_10_1_s_32);
     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib1 created");
@@ -4851,7 +5278,9 @@ fib_test_ae (void)
      */
     u32 import_fib_index1;
 
-    import_fib_index1 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 11);
+    import_fib_index1 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4,
+                                                          11,
+                                                          FIB_SOURCE_CLI);
 
     /*
      * Add an attached route in the import FIB
@@ -4861,7 +5290,7 @@ fib_test_ae (void)
                                    &local_pfx,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -4899,17 +5328,17 @@ fib_test_ae (void)
        },
     };
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_10_10_10_2_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_10_10_10_2_s_32.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_10_10_10_2_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_10_10_10_2_s_32.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_2_s_32);
     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib2 present");
     ai = fib_entry_get_adj(fei);
@@ -4927,7 +5356,8 @@ fib_test_ae (void)
      */
     u32 import_fib_index2;
 
-    import_fib_index2 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 12);
+    import_fib_index2 = fib_table_find_or_create_and_lock(FIB_PROTOCOL_IP4, 12,
+                                                          FIB_SOURCE_CLI);
 
     /*
      * Add an attached route in the import FIB
@@ -4937,7 +5367,7 @@ fib_test_ae (void)
                                    &local_pfx,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -4970,17 +5400,17 @@ fib_test_ae (void)
        },
     };
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_10_10_10_3_s_32,
-                                   FIB_SOURCE_ADJ,
-                                   FIB_ENTRY_FLAG_ATTACHED,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_10_10_10_3_s_32.fp_addr,
-                                   tm->hw[0]->sw_if_index,
-                                   ~0, // invalid fib index
-                                   1,
-                                   NULL,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(fib_index,
+                             &pfx_10_10_10_3_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &pfx_10_10_10_3_s_32.fp_addr,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
     fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_3_s_32);
     FIB_TEST((FIB_NODE_INDEX_INVALID != fei), "ADJ-fib3 present");
     ai = fib_entry_get_adj(fei);
@@ -5046,7 +5476,7 @@ fib_test_ae (void)
                                    &local_pfx,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_10_10_10_2_s_32.fp_addr,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5069,7 +5499,7 @@ fib_test_ae (void)
                                    &local_pfx,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5101,7 +5531,7 @@ fib_test_ae (void)
                                           &pfx_10_0_0_0_s_8,
                                           FIB_SOURCE_API,
                                           FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                           &pfx_10_10_10_3_s_32.fp_addr,
                                           tm->hw[0]->sw_if_index,
                                           ~0, // invalid fib index
@@ -5157,7 +5587,7 @@ fib_test_ae (void)
                                           &local_pfx,
                                           FIB_SOURCE_API,
                                           FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                           &pfx_10_10_10_1_s_32.fp_addr,
                                           tm->hw[0]->sw_if_index,
                                           ~0, // invalid fib index
@@ -5193,7 +5623,7 @@ fib_test_ae (void)
                                    &local_pfx,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5232,7 +5662,7 @@ fib_test_ae (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0,
@@ -5289,8 +5719,8 @@ fib_test_ae (void)
                           &local_pfx,
                           FIB_SOURCE_API);
 
-    fib_table_unlock(import_fib_index1, FIB_PROTOCOL_IP4);
-    fib_table_unlock(import_fib_index2, FIB_PROTOCOL_IP4);
+    fib_table_unlock(import_fib_index1, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
+    fib_table_unlock(import_fib_index2, FIB_PROTOCOL_IP4, FIB_SOURCE_CLI);
 
     FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
             adj_nbr_db_size());
@@ -5298,50 +5728,503 @@ fib_test_ae (void)
     return (0);
 }
 
-
 /*
- * Test the recursive route route handling for GRE tunnels
+ * Test Path Preference
  */
 static int
-fib_test_label (void)
+fib_test_pref (void)
 {
-    fib_node_index_t fei, ai_mpls_10_10_10_1, ai_v4_10_10_11_1, ai_v4_10_10_11_2, ai_mpls_10_10_11_2, ai_mpls_10_10_11_1;
-    const u32 fib_index = 0;
-    test_main_t *tm;
-    ip4_main_t *im;
-    int lb_count, ii;
+    test_main_t *tm = &test_main;
 
-    lb_count = pool_elts(load_balance_pool);
-    tm = &test_main;
-    im = &ip4_main;
+    const fib_prefix_t pfx_1_1_1_1_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = {
+            .ip4 = {
+                .as_u32 = clib_host_to_net_u32(0x01010101),
+            },
+        },
+    };
 
     /*
-     * add interface routes. We'll assume this works. It's more rigorously
-     * tested elsewhere.
+     * 2 high, 2 medium and 2 low preference non-recursive paths
      */
-    fib_prefix_t local0_pfx = {
-       .fp_len = 24,
-       .fp_proto = FIB_PROTOCOL_IP4,
-       .fp_addr = {
-           .ip4 = {
-               /* 10.10.10.10 */
-               .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
-           },
-       },
+    fib_route_path_t nr_path_hi_1 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[0]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 0,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
+        },
     };
-
-    FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
-            adj_nbr_db_size());
-
-    vec_validate(im->fib_index_by_sw_if_index, tm->hw[0]->sw_if_index);
-    im->fib_index_by_sw_if_index[tm->hw[0]->sw_if_index] = fib_index;
-
-    fib_table_entry_update_one_path(fib_index, &local0_pfx,
-                                   FIB_SOURCE_INTERFACE,
-                                   (FIB_ENTRY_FLAG_CONNECTED |
-                                    FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP4,
-                                   NULL,
+    fib_route_path_t nr_path_hi_2 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[0]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 0,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
+        },
+    };
+    fib_route_path_t nr_path_med_1 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[1]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 1,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
+        },
+    };
+    fib_route_path_t nr_path_med_2 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[1]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 1,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0c01),
+        },
+    };
+    fib_route_path_t nr_path_low_1 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[2]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 2,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b01),
+        },
+    };
+    fib_route_path_t nr_path_low_2 = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = tm->hw[2]->sw_if_index,
+        .frp_fib_index = ~0,
+        .frp_weight = 1,
+        .frp_preference = 2,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = {
+            .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0b02),
+        },
+    };
+    fib_route_path_t *nr_paths = NULL;
+
+    vec_add1(nr_paths, nr_path_hi_1);
+    vec_add1(nr_paths, nr_path_hi_2);
+    vec_add1(nr_paths, nr_path_med_1);
+    vec_add1(nr_paths, nr_path_med_2);
+    vec_add1(nr_paths, nr_path_low_1);
+    vec_add1(nr_paths, nr_path_low_2);
+
+    adj_index_t ai_hi_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                              VNET_LINK_IP4,
+                                              &nr_path_hi_1.frp_addr,
+                                              nr_path_hi_1.frp_sw_if_index);
+    adj_index_t ai_hi_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                              VNET_LINK_IP4,
+                                              &nr_path_hi_2.frp_addr,
+                                              nr_path_hi_2.frp_sw_if_index);
+    adj_index_t ai_med_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                               VNET_LINK_IP4,
+                                               &nr_path_med_1.frp_addr,
+                                               nr_path_med_1.frp_sw_if_index);
+    adj_index_t ai_med_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                               VNET_LINK_IP4,
+                                               &nr_path_med_2.frp_addr,
+                                               nr_path_med_2.frp_sw_if_index);
+    adj_index_t ai_low_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                               VNET_LINK_IP4,
+                                               &nr_path_low_1.frp_addr,
+                                               nr_path_low_1.frp_sw_if_index);
+    adj_index_t ai_low_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                               VNET_LINK_IP4,
+                                               &nr_path_low_2.frp_addr,
+                                               nr_path_low_2.frp_sw_if_index);
+
+    fib_test_lb_bucket_t ip_hi_1 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_hi_1,
+        },
+    };
+    fib_test_lb_bucket_t ip_hi_2 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_hi_2,
+        },
+    };
+    fib_test_lb_bucket_t ip_med_1 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_med_1,
+        },
+    };
+    fib_test_lb_bucket_t ip_med_2 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_med_2,
+        },
+    };
+    fib_test_lb_bucket_t ip_low_1 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_low_1,
+        },
+    };
+    fib_test_lb_bucket_t ip_low_2 = {
+        .type = FT_LB_ADJ,
+        .adj = {
+            .adj = ai_low_2,
+        },
+    };
+
+    fib_node_index_t fei;
+
+    fei = fib_table_entry_path_add2(0,
+                                    &pfx_1_1_1_1_s_32,
+                                    FIB_SOURCE_API,
+                                    FIB_ENTRY_FLAG_NONE,
+                                    nr_paths);
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     2,
+                                     &ip_hi_1,
+                                     &ip_hi_2),
+             "1.1.1.1/32 via high preference paths");
+
+    /*
+     * bring down the interface on which the high preference path lie
+     */
+    vnet_sw_interface_set_flags(vnet_get_main(),
+                                tm->hw[0]->sw_if_index,
+                                0);
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     2,
+                                     &ip_med_1,
+                                     &ip_med_2),
+             "1.1.1.1/32 via medium preference paths");
+
+    /*
+     * bring down the interface on which the medium preference path lie
+     */
+    vnet_sw_interface_set_flags(vnet_get_main(),
+                                tm->hw[1]->sw_if_index,
+                                0);
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     2,
+                                     &ip_low_1,
+                                     &ip_low_2),
+             "1.1.1.1/32 via low preference paths");
+
+    /*
+     * bring up the interface on which the high preference path lie
+     */
+    vnet_sw_interface_set_flags(vnet_get_main(),
+                                tm->hw[0]->sw_if_index,
+                                VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     2,
+                                     &ip_hi_1,
+                                     &ip_hi_2),
+             "1.1.1.1/32 via high preference paths");
+
+    /*
+     * bring up the interface on which the medium preference path lie
+     */
+    vnet_sw_interface_set_flags(vnet_get_main(),
+                                tm->hw[1]->sw_if_index,
+                                VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+
+    FIB_TEST(fib_test_validate_entry(fei,
+                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                     2,
+                                     &ip_hi_1,
+                                     &ip_hi_2),
+             "1.1.1.1/32 via high preference paths");
+
+    dpo_id_t ip_1_1_1_1 = DPO_INVALID;
+    fib_entry_contribute_forwarding(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    &ip_1_1_1_1);
+
+    /*
+     * 3 recursive paths of different preference
+     */
+    const fib_prefix_t pfx_1_1_1_2_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = {
+            .ip4 = {
+                .as_u32 = clib_host_to_net_u32(0x01010102),
+            },
+        },
+    };
+    const fib_prefix_t pfx_1_1_1_3_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = {
+            .ip4 = {
+                .as_u32 = clib_host_to_net_u32(0x01010103),
+            },
+        },
+    };
+    fei = fib_table_entry_path_add2(0,
+                                    &pfx_1_1_1_2_s_32,
+                                    FIB_SOURCE_API,
+                                    FIB_ENTRY_FLAG_NONE,
+                                    nr_paths);
+    dpo_id_t ip_1_1_1_2 = DPO_INVALID;
+    fib_entry_contribute_forwarding(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    &ip_1_1_1_2);
+    fei = fib_table_entry_path_add2(0,
+                                    &pfx_1_1_1_3_s_32,
+                                    FIB_SOURCE_API,
+                                    FIB_ENTRY_FLAG_NONE,
+                                    nr_paths);
+    dpo_id_t ip_1_1_1_3 = DPO_INVALID;
+    fib_entry_contribute_forwarding(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    &ip_1_1_1_3);
+
+    fib_test_lb_bucket_t ip_o_1_1_1_1 = {
+        .type = FT_LB_O_LB,
+        .lb = {
+            .lb = ip_1_1_1_1.dpoi_index,
+        },
+    };
+    fib_test_lb_bucket_t ip_o_1_1_1_2 = {
+        .type = FT_LB_O_LB,
+        .lb = {
+            .lb = ip_1_1_1_2.dpoi_index,
+        },
+    };
+    fib_test_lb_bucket_t ip_o_1_1_1_3 = {
+        .type = FT_LB_O_LB,
+        .lb = {
+            .lb = ip_1_1_1_3.dpoi_index,
+        },
+    };
+    fib_route_path_t r_path_hi = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = ~0,
+        .frp_fib_index = 0,
+        .frp_weight = 1,
+        .frp_preference = 0,
+        .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
+        .frp_addr = pfx_1_1_1_1_s_32.fp_addr,
+    };
+    fib_route_path_t r_path_med = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = ~0,
+        .frp_fib_index = 0,
+        .frp_weight = 1,
+        .frp_preference = 10,
+        .frp_flags = FIB_ROUTE_PATH_FLAG_NONE,
+        .frp_addr = pfx_1_1_1_2_s_32.fp_addr,
+    };
+    fib_route_path_t r_path_low = {
+        .frp_proto = DPO_PROTO_IP4,
+        .frp_sw_if_index = ~0,
+        .frp_fib_index = 0,
+        .frp_weight = 1,
+        .frp_preference = 255,
+        .frp_flags = FIB_ROUTE_PATH_RESOLVE_VIA_HOST,
+        .frp_addr = pfx_1_1_1_3_s_32.fp_addr,
+    };
+    fib_route_path_t *r_paths = NULL;
+
+    vec_add1(r_paths, r_path_hi);
+    vec_add1(r_paths, r_path_low);
+    vec_add1(r_paths, r_path_med);
+
+    /*
+     * add many recursive so we get the LB MAp created
+     */
+    #define N_PFXS 64
+    fib_prefix_t pfx_r[N_PFXS];
+    unsigned int n_pfxs;
+    for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
+    {
+        pfx_r[n_pfxs].fp_len = 32;
+        pfx_r[n_pfxs].fp_proto = FIB_PROTOCOL_IP4;
+        pfx_r[n_pfxs].fp_addr.ip4.as_u32 =
+            clib_host_to_net_u32(0x02000000 + n_pfxs);
+
+        fei = fib_table_entry_path_add2(0,
+                                        &pfx_r[n_pfxs],
+                                        FIB_SOURCE_API,
+                                        FIB_ENTRY_FLAG_NONE,
+                                        r_paths);
+
+        FIB_TEST(fib_test_validate_entry(fei,
+                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                         1,
+                                         &ip_o_1_1_1_1),
+                 "recursive via high preference paths");
+
+        /*
+         * withdraw hig pref resolving entry
+         */
+        fib_table_entry_delete(0,
+                               &pfx_1_1_1_1_s_32,
+                               FIB_SOURCE_API);
+
+        /* suspend so the update walk kicks int */
+        vlib_process_suspend(vlib_get_main(), 1e-5);
+
+        FIB_TEST(fib_test_validate_entry(fei,
+                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                         1,
+                                         &ip_o_1_1_1_2),
+                 "recursive via medium preference paths");
+
+        /*
+         * withdraw medium pref resolving entry
+         */
+        fib_table_entry_delete(0,
+                               &pfx_1_1_1_2_s_32,
+                               FIB_SOURCE_API);
+
+        /* suspend so the update walk kicks int */
+        vlib_process_suspend(vlib_get_main(), 1e-5);
+
+        FIB_TEST(fib_test_validate_entry(fei,
+                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                         1,
+                                         &ip_o_1_1_1_3),
+                 "recursive via low preference paths");
+
+        /*
+         * add back paths for next iteration
+         */
+        fei = fib_table_entry_update(0,
+                                     &pfx_1_1_1_2_s_32,
+                                     FIB_SOURCE_API,
+                                     FIB_ENTRY_FLAG_NONE,
+                                     nr_paths);
+        fei = fib_table_entry_update(0,
+                                     &pfx_1_1_1_1_s_32,
+                                     FIB_SOURCE_API,
+                                     FIB_ENTRY_FLAG_NONE,
+                                     nr_paths);
+
+        /* suspend so the update walk kicks int */
+        vlib_process_suspend(vlib_get_main(), 1e-5);
+
+        fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
+        FIB_TEST(fib_test_validate_entry(fei,
+                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                         1,
+                                         &ip_o_1_1_1_1),
+                 "recursive via high preference paths");
+    }
+
+
+    fib_table_entry_delete(0,
+                           &pfx_1_1_1_1_s_32,
+                           FIB_SOURCE_API);
+
+    /* suspend so the update walk kicks int */
+    vlib_process_suspend(vlib_get_main(), 1e-5);
+
+    for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
+    {
+        fei = fib_table_lookup_exact_match(0, &pfx_r[n_pfxs]);
+
+        FIB_TEST(fib_test_validate_entry(fei,
+                                         FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                         1,
+                                         &ip_o_1_1_1_2),
+                 "recursive via medium preference paths");
+    }
+    for (n_pfxs = 0; n_pfxs < N_PFXS; n_pfxs++)
+    {
+        fib_table_entry_delete(0,
+                               &pfx_r[n_pfxs],
+                               FIB_SOURCE_API);
+    }
+
+    /*
+     * Cleanup
+     */
+    fib_table_entry_delete(0,
+                           &pfx_1_1_1_2_s_32,
+                           FIB_SOURCE_API);
+    fib_table_entry_delete(0,
+                           &pfx_1_1_1_3_s_32,
+                           FIB_SOURCE_API);
+
+    dpo_reset(&ip_1_1_1_1);
+    dpo_reset(&ip_1_1_1_2);
+    dpo_reset(&ip_1_1_1_3);
+    adj_unlock(ai_low_2);
+    adj_unlock(ai_low_1);
+    adj_unlock(ai_med_2);
+    adj_unlock(ai_med_1);
+    adj_unlock(ai_hi_2);
+    adj_unlock(ai_hi_1);
+    return (0);
+}
+
+/*
+ * Test the recursive route route handling for GRE tunnels
+ */
+static int
+fib_test_label (void)
+{
+    fib_node_index_t fei, ai_mpls_10_10_10_1, ai_v4_10_10_11_1, ai_v4_10_10_11_2, ai_mpls_10_10_11_2, ai_mpls_10_10_11_1;
+    const u32 fib_index = 0;
+    test_main_t *tm;
+    ip4_main_t *im;
+    int lb_count, ii;
+
+    lb_count = pool_elts(load_balance_pool);
+    tm = &test_main;
+    im = &ip4_main;
+
+    /*
+     * add interface routes. We'll assume this works. It's more rigorously
+     * tested elsewhere.
+     */
+    fib_prefix_t local0_pfx = {
+       .fp_len = 24,
+       .fp_proto = FIB_PROTOCOL_IP4,
+       .fp_addr = {
+           .ip4 = {
+               /* 10.10.10.10 */
+               .as_u32 = clib_host_to_net_u32(0x0a0a0a0a),
+           },
+       },
+    };
+
+    FIB_TEST((0 == adj_nbr_db_size()), "ADJ DB size is %d",
+            adj_nbr_db_size());
+
+    vec_validate(im->fib_index_by_sw_if_index, tm->hw[0]->sw_if_index);
+    im->fib_index_by_sw_if_index[tm->hw[0]->sw_if_index] = fib_index;
+
+    fib_table_entry_update_one_path(fib_index, &local0_pfx,
+                                   FIB_SOURCE_INTERFACE,
+                                   (FIB_ENTRY_FLAG_CONNECTED |
+                                    FIB_ENTRY_FLAG_ATTACHED),
+                                   DPO_PROTO_IP4,
+                                   NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0,
                                    1,
@@ -5356,7 +6239,7 @@ fib_test_label (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5386,7 +6269,7 @@ fib_test_label (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_ATTACHED),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[1]->sw_if_index,
                                    ~0,
@@ -5402,7 +6285,7 @@ fib_test_label (void)
                                    FIB_SOURCE_INTERFACE,
                                    (FIB_ENTRY_FLAG_CONNECTED |
                                     FIB_ENTRY_FLAG_LOCAL),
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[1]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5477,14 +6360,16 @@ fib_test_label (void)
            .eos = MPLS_NON_EOS,
        },
     };
-    mpls_label_t *l99 = NULL;
-    vec_add1(l99, 99);
+    fib_mpls_label_t *l99 = NULL, fml99 = {
+        .fml_value = 99,
+    };
+    vec_add1(l99, fml99);
 
     fib_table_entry_update_one_path(fib_index,
                                    &pfx_1_1_1_1_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -5516,14 +6401,16 @@ fib_test_label (void)
            .adj = ai_mpls_10_10_11_1,
        },
     };
-    mpls_label_t *l_imp_null = NULL;
-    vec_add1(l_imp_null, MPLS_IETF_IMPLICIT_NULL_LABEL);
+    fib_mpls_label_t *l_imp_null = NULL, fml_imp_null = {
+        .fml_value =  MPLS_IETF_IMPLICIT_NULL_LABEL,
+    };
+    vec_add1(l_imp_null, fml_imp_null);
 
     fei = fib_table_entry_path_add(fib_index,
                                   &pfx_1_1_1_1_s_32,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &nh_10_10_11_1,
                                   tm->hw[1]->sw_if_index,
                                   ~0, // invalid fib index
@@ -5557,6 +6444,12 @@ fib_test_label (void)
        .fp_label = 24001,
        .fp_eos = MPLS_NON_EOS,
     };
+    fib_test_lb_bucket_t disp_o_10_10_11_1 = {
+       .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
+       .adj = {
+           .adj = ai_v4_10_10_11_1,
+       },
+    };
 
     /*
      * The EOS entry should link to both the paths,
@@ -5570,10 +6463,10 @@ fib_test_label (void)
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     2,
                                     &l99_eos_o_10_10_10_1,
-                                    &a_o_10_10_11_1),
+                                    &disp_o_10_10_11_1),
             "24001/eos LB 2 buckets via: "
             "label 99 over 10.10.10.1, "
-            "adj over 10.10.11.1");
+            "mpls disp adj over 10.10.11.1");
 
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
@@ -5596,12 +6489,19 @@ fib_test_label (void)
            .adj = ai_v4_10_10_11_2,
        },
     };
+    fib_test_lb_bucket_t disp_o_10_10_11_2 = {
+       .type = FT_LB_MPLS_DISP_PIPE_O_ADJ,
+       .adj = {
+           .adj = ai_v4_10_10_11_2,
+       },
+    };
+
 
     fei = fib_table_entry_path_add(fib_index,
                                   &pfx_1_1_1_1_s_32,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &nh_10_10_11_2,
                                   tm->hw[1]->sw_if_index,
                                   ~0, // invalid fib index
@@ -5672,24 +6572,27 @@ fib_test_label (void)
            .lb = non_eos_1_1_1_1.dpoi_index,
            .label = 1600,
            .eos = MPLS_EOS,
+            .mode = FIB_MPLS_LSP_MODE_UNIFORM,
        },
     };
-    mpls_label_t *l1600 = NULL;
-    vec_add1(l1600, 1600);
+    fib_mpls_label_t *l1600 = NULL, fml1600 = {
+        .fml_value = 1600,
+        .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
+    };
+    vec_add1(l1600, fml1600);
 
-    fib_table_entry_update_one_path(fib_index,
-                                   &pfx_2_2_2_2_s_32,
-                                   FIB_SOURCE_API,
-                                   FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
-                                   &pfx_1_1_1_1_s_32.fp_addr,
-                                   ~0,
-                                   fib_index,
-                                   1,
-                                   l1600,
-                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_update_one_path(fib_index,
+                                          &pfx_2_2_2_2_s_32,
+                                          FIB_SOURCE_API,
+                                          FIB_ENTRY_FLAG_NONE,
+                                          DPO_PROTO_IP4,
+                                          &pfx_1_1_1_1_s_32.fp_addr,
+                                          ~0,
+                                          fib_index,
+                                          1,
+                                          l1600,
+                                          FIB_ROUTE_PATH_FLAG_NONE);
 
-    fei = fib_table_lookup(fib_index, &pfx_2_2_2_2_s_32);
     FIB_TEST(fib_test_validate_entry(fei, 
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     1,
@@ -5744,11 +6647,11 @@ fib_test_label (void)
     FIB_TEST(fib_test_validate_entry(fei, 
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     2,
-                                    &a_o_10_10_11_1,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_2),
             "24001/eos LB 2 buckets via: "
-            "adj over 10.10.11.1, ",
-            "adj-v4 over 10.10.11.2");
+            "mpls-disp adj over 10.10.11.1, ",
+            "mpls-disp adj-v4 over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_24001_neos);
@@ -5821,20 +6724,20 @@ fib_test_label (void)
                                     &l99_eos_o_10_10_10_1,
                                     &l99_eos_o_10_10_10_1,
                                     &l99_eos_o_10_10_10_1,
-                                    &a_o_10_10_11_1,
-                                    &a_o_10_10_11_1,
-                                    &a_o_10_10_11_1,
-                                    &a_o_10_10_11_1,
-                                    &a_o_10_10_11_1,
-                                    &adj_o_10_10_11_2,
-                                    &adj_o_10_10_11_2,
-                                    &adj_o_10_10_11_2,
-                                    &adj_o_10_10_11_2,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_2,
+                                    &disp_o_10_10_11_2,
+                                    &disp_o_10_10_11_2,
+                                    &disp_o_10_10_11_2,
+                                    &disp_o_10_10_11_2),
             "24001/eos LB 16 buckets via: "
             "label 99 over 10.10.10.1, "
-            "adj over 10.10.11.1",
-            "adj-v4 over 10.10.11.2");
+            "MPLS disp adj over 10.10.11.1",
+            "MPLS disp adj-v4 over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_24001_neos);
@@ -5853,7 +6756,7 @@ fib_test_label (void)
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_10_1,
                                tm->hw[0]->sw_if_index,
                                ~0, // invalid fib index
@@ -5875,11 +6778,11 @@ fib_test_label (void)
     FIB_TEST(fib_test_validate_entry(fei, 
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     2,
-                                    &a_o_10_10_11_1,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_1,
+                                    &disp_o_10_10_11_2),
             "24001/eos LB 2 buckets via: "
-            "adj over 10.10.11.1, "
-            "adj-v4 over 10.10.11.2");
+            "MPLS disp adj over 10.10.11.1, "
+            "MPLS disp adj-v4 over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_24001_neos);
@@ -5895,16 +6798,19 @@ fib_test_label (void)
      * remove the other path with a valid label
      */
     fib_test_lb_bucket_t bucket_drop = {
-       .type = FT_LB_SPECIAL,
+       .type = FT_LB_DROP,
+    };
+    fib_test_lb_bucket_t mpls_bucket_drop = {
+       .type = FT_LB_DROP,
        .special = {
-           .adj = DPO_PROTO_IP4,
+           .adj = DPO_PROTO_MPLS,
        },
     };
 
     fib_table_entry_path_remove(fib_index,
                                &pfx_1_1_1_1_s_32,
                                FIB_SOURCE_API,
-                               FIB_PROTOCOL_IP4,
+                               DPO_PROTO_IP4,
                                &nh_10_10_11_1,
                                tm->hw[1]->sw_if_index,
                                ~0, // invalid fib index
@@ -5924,29 +6830,29 @@ fib_test_label (void)
     FIB_TEST(fib_test_validate_entry(fei, 
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     1,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_2),
             "24001/eos LB 1 buckets via: "
-            "adj over 10.10.11.2");
+            "MPLS disp adj over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_24001_neos);
     FIB_TEST(fib_test_validate_entry(fei, 
                                     FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
-                                     1,
-                                     &bucket_drop),
-            "24001/eos LB 1 buckets via: DROP");
+                                     1,
+                                     &mpls_bucket_drop),
+            "24001/neos LB 1 buckets via: DROP");
 
     /*
      * add back the path with the valid label
      */
     l99 = NULL;
-    vec_add1(l99, 99);
+    vec_add1(l99, fml99);
 
     fib_table_entry_path_add(fib_index,
                             &pfx_1_1_1_1_s_32,
                             FIB_SOURCE_API,
                             FIB_ENTRY_FLAG_NONE,
-                            FIB_PROTOCOL_IP4,
+                            DPO_PROTO_IP4,
                             &nh_10_10_10_1,
                             tm->hw[0]->sw_if_index,
                             ~0, // invalid fib index
@@ -5970,10 +6876,10 @@ fib_test_label (void)
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     2,
                                     &l99_eos_o_10_10_10_1,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_2),
             "24001/eos LB 2 buckets via: "
             "label 99 over 10.10.10.1, "
-            "adj over 10.10.11.2");
+            "MPLS disp adj over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_24001_neos);
@@ -6015,10 +6921,10 @@ fib_test_label (void)
                                     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                     2,
                                     &l99_eos_o_10_10_10_1,
-                                    &adj_o_10_10_11_2),
+                                    &disp_o_10_10_11_2),
             "25005/eos LB 2 buckets via: "
             "label 99 over 10.10.10.1, "
-            "adj over 10.10.11.2");
+            "MPLS disp adj over 10.10.11.2");
 
     fei = fib_table_lookup(MPLS_FIB_DEFAULT_TABLE_ID,
                           &pfx_25005_neos);
@@ -6070,14 +6976,16 @@ fib_test_label (void)
            .eos = MPLS_EOS,
        },
     };
-    mpls_label_t *l101 = NULL;
-    vec_add1(l101, 101);
+    fib_mpls_label_t *l101 = NULL, fml101 = {
+        .fml_value = 101,
+    };
+    vec_add1(l101, fml101);
 
     fei = fib_table_entry_update_one_path(fib_index,
                                          &pfx_1_1_1_2_s_32,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_10_1,
                                          tm->hw[0]->sw_if_index,
                                          ~0, // invalid fib index
@@ -6110,8 +7018,10 @@ fib_test_label (void)
            .eos = MPLS_EOS,
        },
     };
-    mpls_label_t *l1601 = NULL;
-    vec_add1(l1601, 1601);
+    fib_mpls_label_t *l1601 = NULL, fml1601 = {
+        .fml_value = 1601,
+    };
+    vec_add1(l1601, fml1601);
 
     l1600_eos_o_1_1_1_1.label_o_lb.lb = non_eos_1_1_1_1.dpoi_index;
 
@@ -6119,7 +7029,7 @@ fib_test_label (void)
                                   &pfx_2_2_2_2_s_32,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &pfx_1_1_1_2_s_32.fp_addr,
                                   ~0,
                                   fib_index,
@@ -6141,13 +7051,13 @@ fib_test_label (void)
      * the LB for the recursive can use an imp-null
      */
     l_imp_null = NULL;
-    vec_add1(l_imp_null, MPLS_IETF_IMPLICIT_NULL_LABEL);
+    vec_add1(l_imp_null, fml_imp_null);
 
     fei = fib_table_entry_update_one_path(fib_index,
                                          &pfx_1_1_1_2_s_32,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_11_1,
                                          tm->hw[1]->sw_if_index,
                                          ~0, // invalid fib index
@@ -6180,7 +7090,7 @@ fib_test_label (void)
                                          &pfx_1_1_1_2_s_32,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_11_1,
                                          tm->hw[1]->sw_if_index,
                                          ~0, // invalid fib index
@@ -6222,7 +7132,7 @@ fib_test_label (void)
                                    &pfx_2_2_2_3_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_1_1_1_1_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -6266,7 +7176,7 @@ fib_test_label (void)
                                    &pfx_2_2_2_4_s_32,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &pfx_1_1_1_1_s_32.fp_addr,
                                    ~0,
                                    fib_index,
@@ -6305,18 +7215,18 @@ fib_test_label (void)
            .eos = MPLS_EOS,
        },
     };
-    mpls_label_t *label_stack = NULL;
+    fib_mpls_label_t *label_stack = NULL;
     vec_validate(label_stack, 7);
     for (ii = 0; ii < 8; ii++)
     {
-       label_stack[ii] = ii + 200;
+       label_stack[ii].fml_value = ii + 200;
     }
 
     fei = fib_table_entry_update_one_path(fib_index,
                                          &pfx_2_2_5_5_s_32,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_11_1,
                                          tm->hw[1]->sw_if_index,
                                          ~0, // invalid fib index
@@ -6924,7 +7834,7 @@ fib_test_bfd (void)
                                     FIB_SOURCE_INTERFACE,
                                     (FIB_ENTRY_FLAG_CONNECTED |
                                      FIB_ENTRY_FLAG_ATTACHED),
-                                    FIB_PROTOCOL_IP4,
+                                    DPO_PROTO_IP4,
                                     NULL,
                                     tm->hw[0]->sw_if_index,
                                     ~0, // invalid fib index
@@ -6941,7 +7851,7 @@ fib_test_bfd (void)
                                     FIB_SOURCE_INTERFACE,
                                     (FIB_ENTRY_FLAG_CONNECTED |
                                      FIB_ENTRY_FLAG_LOCAL),
-                                    FIB_PROTOCOL_IP4,
+                                    DPO_PROTO_IP4,
                                     NULL,
                                     tm->hw[0]->sw_if_index,
                                     ~0, // invalid fib index
@@ -7011,17 +7921,17 @@ fib_test_bfd (void)
     /*
      * source the entry via the ADJ fib
      */
-    fei = fib_table_entry_update_one_path(0,
-                                          &pfx_10_10_10_1_s_32,
-                                          FIB_SOURCE_ADJ,
-                                          FIB_ENTRY_FLAG_ATTACHED,
-                                          FIB_PROTOCOL_IP4,
-                                          &nh_10_10_10_1,
-                                          tm->hw[0]->sw_if_index,
-                                          ~0, // invalid fib index
-                                          1,
-                                          NULL,
-                                          FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_entry_path_add(0,
+                                   &pfx_10_10_10_1_s_32,
+                                   FIB_SOURCE_ADJ,
+                                   FIB_ENTRY_FLAG_ATTACHED,
+                                   DPO_PROTO_IP4,
+                                   &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0, // invalid fib index
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
 
     /*
      * Delete the BFD session. Expect the fib_entry to remain
@@ -7050,17 +7960,17 @@ fib_test_bfd (void)
         .fp_len = 32,
         .fp_proto = FIB_PROTOCOL_IP4,
     };
-    fib_table_entry_update_one_path(0,
-                                    &pfx_10_10_10_2_s_32,
-                                    FIB_SOURCE_ADJ,
-                                    FIB_ENTRY_FLAG_ATTACHED,
-                                    FIB_PROTOCOL_IP4,
-                                    &nh_10_10_10_2,
-                                    tm->hw[0]->sw_if_index,
-                                    ~0, // invalid fib index
-                                    1,
-                                    NULL,
-                                    FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(0,
+                             &pfx_10_10_10_2_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &nh_10_10_10_2,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
     /*
      * A BFD session for the new ADJ FIB
      */
@@ -7082,17 +7992,17 @@ fib_test_bfd (void)
      * then add it back
      */
     fib_table_entry_delete(0, &pfx_10_10_10_2_s_32, FIB_SOURCE_ADJ);
-    fib_table_entry_update_one_path(0,
-                                    &pfx_10_10_10_2_s_32,
-                                    FIB_SOURCE_ADJ,
-                                    FIB_ENTRY_FLAG_ATTACHED,
-                                    FIB_PROTOCOL_IP4,
-                                    &nh_10_10_10_2,
-                                    tm->hw[0]->sw_if_index,
-                                    ~0, // invalid fib index
-                                    1,
-                                    NULL,
-                                    FIB_ROUTE_PATH_FLAG_NONE);
+    fib_table_entry_path_add(0,
+                             &pfx_10_10_10_2_s_32,
+                             FIB_SOURCE_ADJ,
+                             FIB_ENTRY_FLAG_ATTACHED,
+                             DPO_PROTO_IP4,
+                             &nh_10_10_10_2,
+                             tm->hw[0]->sw_if_index,
+                             ~0, // invalid fib index
+                             1,
+                             NULL,
+                             FIB_ROUTE_PATH_FLAG_NONE);
 
     /*
      * Before adding a recursive via the BFD tracked ADJ-FIBs,
@@ -7142,7 +8052,7 @@ fib_test_bfd (void)
                                    &pfx_200_0_0_0_s_24,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_2,
                                    ~0, // recursive
                                    0, // default fib index
@@ -7161,7 +8071,7 @@ fib_test_bfd (void)
                                    &pfx_200_0_0_0_s_24,
                                    FIB_SOURCE_API,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    ~0, // recursive
                                    0, // default fib index
@@ -7300,7 +8210,7 @@ fib_test_bfd (void)
                                    &pfx_5_5_5_5_s_32,
                                    FIB_SOURCE_CLI,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_1,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -7331,7 +8241,7 @@ fib_test_bfd (void)
                                    &pfx_5_5_5_5_s_32,
                                    FIB_SOURCE_CLI,
                                    FIB_ENTRY_FLAG_NONE,
-                                   FIB_PROTOCOL_IP4,
+                                   DPO_PROTO_IP4,
                                    &nh_10_10_10_2,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -7384,12 +8294,13 @@ static int
 lfib_test (void)
 {
     const mpls_label_t deag_label = 50;
+    dpo_id_t dpo = DPO_INVALID;
+    const mpls_disp_dpo_t *mdd;
     const u32 lfib_index = 0;
     const u32 fib_index = 0;
-    dpo_id_t dpo = DPO_INVALID;
+    const lookup_dpo_t *lkd;
     const dpo_id_t *dpo1;
     fib_node_index_t lfe;
-    lookup_dpo_t *lkd;
     test_main_t *tm;
     int lb_count;
     adj_index_t ai_mpls_10_10_10_1;
@@ -7403,9 +8314,10 @@ lfib_test (void)
     /*
      * MPLS enable an interface so we get the MPLS table created
      */
+    mpls_table_create(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API, NULL);
     mpls_sw_interface_enable_disable(&mpls_main,
                                      tm->hw[0]->sw_if_index,
-                                     1);
+                                     1, 1);
 
     ip46_address_t nh_10_10_10_1 = {
        .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
@@ -7455,7 +8367,6 @@ lfib_test (void)
              format_mpls_eos_bit, MPLS_EOS,
              format_dpo_proto, lkd->lkd_proto);
 
-
     /*
      * A route deag route for EOS
      */
@@ -7469,7 +8380,7 @@ lfib_test (void)
                                   &pfx,
                                   FIB_SOURCE_CLI,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &zero_addr,
                                   ~0,
                                   fib_index,
@@ -7486,7 +8397,14 @@ lfib_test (void)
                                    FIB_FORW_CHAIN_TYPE_MPLS_EOS,
                                    &dpo);
     dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
-    lkd = lookup_dpo_get(dpo1->dpoi_index);
+    mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
+
+    FIB_TEST((FIB_MPLS_LSP_MODE_PIPE == mdd->mdd_mode),
+             "%U/%U disp is pipe mode",
+             format_mpls_unicast_label, deag_label,
+             format_mpls_eos_bit, MPLS_EOS);
+
+    lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
 
     FIB_TEST((fib_index == lkd->lkd_fib_index),
               "%U/%U is deag in %d %U",
@@ -7511,6 +8429,70 @@ lfib_test (void)
               "%U/%U not present",
               format_mpls_unicast_label, deag_label,
               format_mpls_eos_bit, MPLS_EOS);
+    dpo_reset(&dpo);
+
+    /*
+     * A route deag route for EOS with LSP mode uniform
+     */
+    fib_mpls_label_t *l_pops = NULL, l_pop = {
+        .fml_value = MPLS_LABEL_POP,
+        .fml_mode = FIB_MPLS_LSP_MODE_UNIFORM,
+    };
+    vec_add1(l_pops, l_pop);
+    lfe = fib_table_entry_path_add(lfib_index,
+                                  &pfx,
+                                  FIB_SOURCE_CLI,
+                                  FIB_ENTRY_FLAG_NONE,
+                                  DPO_PROTO_IP4,
+                                  &zero_addr,
+                                  ~0,
+                                  fib_index,
+                                  1,
+                                  l_pops,
+                                  FIB_ROUTE_PATH_FLAG_NONE);
+
+    FIB_TEST((lfe == fib_table_lookup(lfib_index, &pfx)),
+              "%U/%U present",
+              format_mpls_unicast_label, deag_label,
+              format_mpls_eos_bit, MPLS_EOS);
+
+    fib_entry_contribute_forwarding(lfe,
+                                   FIB_FORW_CHAIN_TYPE_MPLS_EOS,
+                                   &dpo);
+    dpo1 = load_balance_get_bucket(dpo.dpoi_index, 0);
+    mdd = mpls_disp_dpo_get(dpo1->dpoi_index);
+
+    FIB_TEST((FIB_MPLS_LSP_MODE_UNIFORM == mdd->mdd_mode),
+             "%U/%U disp is uniform mode",
+             format_mpls_unicast_label, deag_label,
+             format_mpls_eos_bit, MPLS_EOS);
+
+    lkd = lookup_dpo_get(mdd->mdd_dpo.dpoi_index);
+
+    FIB_TEST((fib_index == lkd->lkd_fib_index),
+              "%U/%U is deag in %d %U",
+             format_mpls_unicast_label, deag_label,
+             format_mpls_eos_bit, MPLS_EOS,
+             lkd->lkd_fib_index,
+             format_dpo_id, &dpo, 0);
+    FIB_TEST((LOOKUP_INPUT_DST_ADDR == lkd->lkd_input),
+             "%U/%U is dst deag",
+             format_mpls_unicast_label, deag_label,
+             format_mpls_eos_bit, MPLS_EOS);
+    FIB_TEST((DPO_PROTO_IP4 == lkd->lkd_proto),
+             "%U/%U is %U dst deag",
+             format_mpls_unicast_label, deag_label,
+             format_mpls_eos_bit, MPLS_EOS,
+             format_dpo_proto, lkd->lkd_proto);
+
+    fib_table_entry_delete_index(lfe, FIB_SOURCE_CLI);
+
+    FIB_TEST((FIB_NODE_INDEX_INVALID == fib_table_lookup(lfib_index,
+                                                        &pfx)),
+              "%U/%U not present",
+              format_mpls_unicast_label, deag_label,
+              format_mpls_eos_bit, MPLS_EOS);
+    dpo_reset(&dpo);
 
     /*
      * A route deag route for non-EOS
@@ -7520,7 +8502,7 @@ lfib_test (void)
                                   &pfx,
                                   FIB_SOURCE_CLI,
                                   FIB_ENTRY_FLAG_NONE,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                   &zero_addr,
                                   ~0,
                                   lfib_index,
@@ -7588,17 +8570,21 @@ lfib_test (void)
     };
     dpo_id_t neos_1200 = DPO_INVALID;
     dpo_id_t ip_1200 = DPO_INVALID;
-    mpls_label_t *l200 = NULL;
-    vec_add1(l200, 200);
-    vec_add1(l200, 300);
-    vec_add1(l200, 400);
-    vec_add1(l200, 500);
+    fib_mpls_label_t *l200 = NULL;
+    u32 ii;
+    for (ii = 0; ii < 4; ii++)
+    {
+        fib_mpls_label_t fml = {
+            .fml_value = 200 + (ii * 100),
+        };
+        vec_add1(l200, fml);
+    };
 
     lfe = fib_table_entry_update_one_path(fib_index,
                                          &pfx_1200,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_10_1,
                                          tm->hw[0]->sw_if_index,
                                          ~0, // invalid fib index
@@ -7624,7 +8610,7 @@ lfib_test (void)
        },
     };
     fib_route_path_t *rpaths = NULL, rpath = {
-       .frp_proto = FIB_PROTOCOL_MPLS,
+        .frp_proto = DPO_PROTO_MPLS,
        .frp_local_label = 1200,
         .frp_eos = MPLS_NON_EOS,
        .frp_sw_if_index = ~0, // recurive
@@ -7651,8 +8637,10 @@ lfib_test (void)
            .ip4.as_u32 = clib_host_to_net_u32(0x02020204),
        },
     };
-    mpls_label_t *l999 = NULL;
-    vec_add1(l999, 999);
+    fib_mpls_label_t *l999 = NULL, fml_999 = {
+        .fml_value = 999,
+    };
+    vec_add1(l999, fml_999);
     rpaths[0].frp_label_stack = l999,
 
     fib_table_entry_path_add2(fib_index,
@@ -7707,7 +8695,13 @@ lfib_test (void)
      * A recursive via a label that does not exist
      */
     fib_test_lb_bucket_t bucket_drop = {
-       .type = FT_LB_SPECIAL,
+       .type = FT_LB_DROP,
+       .special = {
+           .adj = DPO_PROTO_IP4,
+       },
+    };
+    fib_test_lb_bucket_t mpls_bucket_drop = {
+       .type = FT_LB_DROP,
        .special = {
            .adj = DPO_PROTO_MPLS,
        },
@@ -7728,14 +8722,19 @@ lfib_test (void)
     FIB_TEST(fib_test_validate_entry(lfe,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     1,
-                                    &ip_o_1200),
-            "2.2.2.2.4/32 LB 1 buckets via: label 1200 EOS");
+                                    &bucket_drop),
+            "2.2.2.2.4/32 LB 1 buckets via: drop");
     lfe = fib_table_lookup(fib_index, &pfx_1200);
     FIB_TEST(fib_test_validate_entry(lfe,
                                     FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
                                     1,
                                     &bucket_drop),
-            "2.2.2.4/32 LB 1 buckets via: ip4-DROP");
+            "1200/neos LB 1 buckets via: ip4-DROP");
+    FIB_TEST(fib_test_validate_entry(lfe,
+                                    FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS,
+                                    1,
+                                    &mpls_bucket_drop),
+            "1200/neos LB 1 buckets via: mpls-DROP");
 
     fib_table_entry_delete(fib_index, &pfx_2_2_2_4_s_32, FIB_SOURCE_API);
 
@@ -7747,7 +8746,7 @@ lfib_test (void)
      */
     dpo_id_t idpo = DPO_INVALID;
 
-    interface_dpo_add_or_lock(DPO_PROTO_IP4,
+    interface_rx_dpo_add_or_lock(DPO_PROTO_IP4,
                               tm->hw[0]->sw_if_index,
                               &idpo);
 
@@ -7769,7 +8768,7 @@ lfib_test (void)
                                          &pfx_2500,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_NONE,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          NULL,
                                          tm->hw[0]->sw_if_index,
                                          ~0, // invalid fib index
@@ -7807,14 +8806,16 @@ lfib_test (void)
             .adj = idpo.dpoi_index,
         },
     };
-    mpls_label_t *l3300 = NULL;
-    vec_add1(l3300, 3300);
+    fib_mpls_label_t *l3300 = NULL, fml_3300 = {
+        .fml_value = 3300,
+    };
+    vec_add1(l3300, fml_3300);
 
     lfe = fib_table_entry_update_one_path(lfib_index,
                                          &pfx_3500,
                                          FIB_SOURCE_API,
                                          FIB_ENTRY_FLAG_MULTICAST,
-                                         FIB_PROTOCOL_IP4,
+                                         DPO_PROTO_IP4,
                                          &nh_10_10_10_1,
                                          tm->hw[0]->sw_if_index,
                                          ~0, // invalid fib index
@@ -7834,7 +8835,7 @@ lfib_test (void)
                                   &pfx_3500,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_MULTICAST,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                    NULL,
                                    tm->hw[0]->sw_if_index,
                                    ~0, // invalid fib index
@@ -7861,7 +8862,7 @@ lfib_test (void)
                                   &pfx_3500,
                                   FIB_SOURCE_API,
                                   FIB_ENTRY_FLAG_MULTICAST,
-                                  FIB_PROTOCOL_IP4,
+                                  DPO_PROTO_IP4,
                                    NULL,
                                    5, // rpf-id
                                    0, // default table
@@ -7886,15 +8887,809 @@ lfib_test (void)
      */
     mpls_sw_interface_enable_disable(&mpls_main,
                                      tm->hw[0]->sw_if_index,
-                                     0);
+                                     0, 1);
+    mpls_table_delete(MPLS_FIB_DEFAULT_TABLE_ID, FIB_SOURCE_API);
 
+    FIB_TEST(0 == pool_elts(mpls_disp_dpo_pool),
+            "mpls_disp_dpo resources freed %d of %d",
+             0, pool_elts(mpls_disp_dpo_pool));
     FIB_TEST(lb_count == pool_elts(load_balance_pool),
             "Load-balance resources freed %d of %d",
              lb_count, pool_elts(load_balance_pool));
-    FIB_TEST(0 == pool_elts(interface_dpo_pool),
-            "interface_dpo resources freed %d of %d",
-             0, pool_elts(interface_dpo_pool));
+    FIB_TEST(0 == pool_elts(interface_rx_dpo_pool),
+            "interface_rx_dpo resources freed %d of %d",
+             0, pool_elts(interface_rx_dpo_pool));
+
+    return (0);
+}
+
+static int
+fib_test_inherit (void)
+{
+    fib_node_index_t fei;
+    test_main_t *tm;
+    int n_feis;
+
+    n_feis = fib_entry_pool_size();
+    tm = &test_main;
+
+    const ip46_address_t nh_10_10_10_1 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a01),
+    };
+    const ip46_address_t nh_10_10_10_2 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a02),
+    };
+    const ip46_address_t nh_10_10_10_16 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a10),
+    };
+    const ip46_address_t nh_10_10_10_20 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a14),
+    };
+    const ip46_address_t nh_10_10_10_21 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a15),
+    };
+    const ip46_address_t nh_10_10_10_22 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a16),
+    };
+    const ip46_address_t nh_10_10_10_255 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0aff),
+    };
+    const ip46_address_t nh_10_10_10_0 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0a00),
+    };
+    const ip46_address_t nh_10_10_0_0 = {
+       .ip4.as_u32 = clib_host_to_net_u32(0x0a0a0000),
+    };
+
+    /*
+     * prefixes at the base of a sub-tree
+     */
+    const fib_prefix_t pfx_10_10_10_21_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_21,
+    };
+    const fib_prefix_t pfx_10_10_10_22_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_22,
+    };
+    const fib_prefix_t pfx_10_10_10_255_s_32 = {
+        .fp_len = 32,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_255,
+    };
+
+    fib_table_entry_special_add(0,
+                               &pfx_10_10_10_21_s_32,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+    fib_table_entry_special_add(0,
+                               &pfx_10_10_10_22_s_32,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+    fib_table_entry_special_add(0,
+                               &pfx_10_10_10_255_s_32,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+
+    /*
+     * source an entry that pushes its state down the sub-tree
+     */
+    const fib_prefix_t pfx_10_10_10_16_s_28 = {
+        .fp_len = 28,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_16,
+    };
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_16_s_28,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+
+    /*
+     * this covering entry and all those below it should have
+     * the same forwarding information.
+     */
+    adj_index_t ai_10_10_10_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                                    VNET_LINK_IP4,
+                                                    &nh_10_10_10_1,
+                                                    tm->hw[0]->sw_if_index);
+    fib_test_lb_bucket_t adj_o_10_10_10_1 = {
+       .type = FT_LB_ADJ,
+       .adj = {
+           .adj = ai_10_10_10_1,
+       },
+    };
+
+    fei = fib_table_lookup(0, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+
+    /*
+     * remove the inherting cover - covereds go back to drop
+     */
+    fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+
+    /*
+     * source an entry that pushes its state down the sub-tree
+     */
+    const fib_prefix_t pfx_10_10_10_0_s_24 = {
+        .fp_len = 24,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_0,
+    };
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_0_s_24,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+
+    /*
+     * whole sub-tree now covered
+     */
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+
+    /*
+     * insert a more specific into the sub-tree - expect inheritance
+     *  this one is directly covered by the root
+     */
+    fib_table_entry_special_add(0,
+                               &pfx_10_10_10_16_s_28,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+
+    /*
+     * insert a more specific into the sub-tree - expect inheritance
+     *  this one is indirectly covered by the root
+     */
+    const fib_prefix_t pfx_10_10_10_20_s_30 = {
+        .fp_len = 30,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_10_20,
+    };
+    fib_table_entry_special_add(0,
+                               &pfx_10_10_10_20_s_30,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_20_s_30);
+
+    /*
+     * remove the prefix from the middle of the sub-tree
+     *  the inherited source will be the only one remaining - expect
+     *  it to be withdrawn and hence the prefix is removed.
+     */
+    fib_table_entry_special_remove(0,
+                                   &pfx_10_10_10_20_s_30,
+                                   FIB_SOURCE_CLI);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_20_s_30);
+    FIB_TEST((FIB_NODE_INDEX_INVALID == fei),
+             "%U gone",
+             format_fib_prefix, &pfx_10_10_10_20_s_30);
+
+    /*
+     * inheriting source is modifed - expect the modification to be present
+     *  throughout the sub-tree
+     */
+    adj_index_t ai_10_10_10_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+                                                    VNET_LINK_IP4,
+                                                    &nh_10_10_10_2,
+                                                    tm->hw[0]->sw_if_index);
+    fib_test_lb_bucket_t adj_o_10_10_10_2 = {
+       .type = FT_LB_ADJ,
+       .adj = {
+           .adj = ai_10_10_10_2,
+       },
+    };
+
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_0_s_24,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_2,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+
+    /*
+     * add the source that replaces inherited state.
+     * inheriting source is not the best, so it doesn't push state.
+     */
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_0_s_24,
+                                   FIB_SOURCE_PLUGIN_HI,
+                                   FIB_ENTRY_FLAG_NONE,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+        fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+
+    /*
+     * withdraw the higher priority source and expect the inherited to return
+     * throughout the sub-tree
+     */
+    fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_PLUGIN_HI);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+
+    /*
+     * source a covered entry in the sub-tree with the same inherting source
+     *  - expect that it now owns the sub-tree and thus over-rides its cover
+     */
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_16_s_28,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+
+    /* these two unaffected by the sub-tree change */
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+
+    /*
+     * removes the more specific, expect the /24 to now re-owns the sub-tree
+     */
+    fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_API);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+    /*
+     * modify the /24. expect the new forwarding to be pushed down
+     */
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_10_0_s_24,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+
+    /*
+     * add an entry less specific to /24. it should not own the /24's tree
+     */
+    const fib_prefix_t pfx_10_10_0_0_s_16 = {
+        .fp_len = 16,
+        .fp_proto = FIB_PROTOCOL_IP4,
+        .fp_addr = nh_10_10_0_0,
+    };
+    fib_table_entry_update_one_path(0,
+                                    &pfx_10_10_0_0_s_16,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP4,
+                                    &nh_10_10_10_2,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_21_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_16_s_28);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_21_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_22_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_22_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_255_s_32);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_255_s_32);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_10_0_s_24);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_1),
+            "%U via 10.10.10.1",
+             format_fib_prefix, &pfx_10_10_10_0_s_24);
+    fei = fib_table_lookup_exact_match(0, &pfx_10_10_0_0_s_16);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+                                    1,
+                                    &adj_o_10_10_10_2),
+            "%U via 10.10.10.2",
+             format_fib_prefix, &pfx_10_10_0_0_s_16);
+
+    /*
+     * cleanup
+     */
+    fib_table_entry_delete(0, &pfx_10_10_10_21_s_32, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_10_10_10_22_s_32, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_10_10_10_16_s_28, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_10_10_10_255_s_32, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_10_10_10_0_s_24, FIB_SOURCE_API);
+    fib_table_entry_delete(0, &pfx_10_10_0_0_s_16, FIB_SOURCE_API);
+    adj_unlock(ai_10_10_10_1);
+    adj_unlock(ai_10_10_10_2);
+
+    /*
+     * test the v6 tree walk.
+     * a /64 that covers everytinhg. a /96 that covers one /128
+     * a second /128 covered only by the /64.
+     */
+    const fib_prefix_t pfx_2001_s_64 = {
+        .fp_len = 64,
+        .fp_proto = FIB_PROTOCOL_IP6,
+        .fp_addr = {
+            .ip6 = {
+               .as_u64 = {
+                   [0] = clib_host_to_net_u64(0x2001000000000000),
+                   [1] = clib_host_to_net_u64(0x0000000000000000),
+               },
+            },
+        },
+    };
+    const fib_prefix_t pfx_2001_1_s_96 = {
+        .fp_len = 96,
+        .fp_proto = FIB_PROTOCOL_IP6,
+        .fp_addr = {
+            .ip6 = {
+               .as_u64 = {
+                   [0] = clib_host_to_net_u64(0x2001000000000000),
+                   [1] = clib_host_to_net_u64(0x1000000000000000),
+               },
+            },
+        },
+    };
+    const fib_prefix_t pfx_2001_1_1_s_128 = {
+        .fp_len = 128,
+        .fp_proto = FIB_PROTOCOL_IP6,
+        .fp_addr = {
+            .ip6 = {
+               .as_u64 = {
+                   [0] = clib_host_to_net_u64(0x2001000000000000),
+                   [1] = clib_host_to_net_u64(0x1000000000000001),
+               },
+            },
+        },
+    };
+    const fib_prefix_t pfx_2001_0_1_s_128 = {
+        .fp_len = 128,
+        .fp_proto = FIB_PROTOCOL_IP6,
+        .fp_addr = {
+            .ip6 = {
+               .as_u64 = {
+                   [0] = clib_host_to_net_u64(0x2001000000000000),
+                   [1] = clib_host_to_net_u64(0x0000000000000001),
+               },
+            },
+        },
+    };
+    const ip46_address_t nh_3000_1 = {
+        .ip6 = {
+            .as_u64 = {
+                [0] = clib_host_to_net_u64(0x3000000000000000),
+                [1] = clib_host_to_net_u64(0x0000000000000001),
+            },
+        },
+    };
+    const ip46_address_t nh_3000_2 = {
+        .ip6 = {
+            .as_u64 = {
+                [0] = clib_host_to_net_u64(0x3000000000000000),
+                [1] = clib_host_to_net_u64(0x0000000000000002),
+            },
+        },
+    };
+    adj_index_t ai_3000_1 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
+                                                VNET_LINK_IP6,
+                                                &nh_3000_1,
+                                                tm->hw[0]->sw_if_index);
+    adj_index_t ai_3000_2 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP6,
+                                                VNET_LINK_IP6,
+                                                &nh_3000_2,
+                                                tm->hw[0]->sw_if_index);
+    fib_test_lb_bucket_t adj_o_3000_1 = {
+       .type = FT_LB_ADJ,
+       .adj = {
+           .adj = ai_3000_1,
+       },
+    };
+    fib_test_lb_bucket_t adj_o_3000_2 = {
+       .type = FT_LB_ADJ,
+       .adj = {
+           .adj = ai_3000_2,
+       },
+    };
+
+    fib_table_entry_special_add(0,
+                               &pfx_2001_0_1_s_128,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+    fib_table_entry_special_add(0,
+                               &pfx_2001_1_1_s_128,
+                               FIB_SOURCE_CLI,
+                               FIB_ENTRY_FLAG_DROP);
+
+    /*
+     * /96 has inherited forwarding pushed down to its covered /128
+     */
+    fib_table_entry_update_one_path(0,
+                                    &pfx_2001_1_s_96,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP6,
+                                    &nh_3000_1,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_1),
+            "%U via 3000::1",
+             format_fib_prefix, &pfx_2001_1_s_96);
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_1),
+            "%U via 3000::1",
+             format_fib_prefix, &pfx_2001_1_1_s_128);
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
+    FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(fei)),
+             "%U resolves via drop",
+             format_fib_prefix, &pfx_2001_0_1_s_128);
+
+    /*
+     * /64 has inherited forwarding pushed down to all, but the /96
+     * and its sub-tree remain unaffected.
+     */
+    fib_table_entry_update_one_path(0,
+                                    &pfx_2001_s_64,
+                                   FIB_SOURCE_API,
+                                   FIB_ENTRY_FLAG_COVERED_INHERIT,
+                                   DPO_PROTO_IP6,
+                                    &nh_3000_2,
+                                   tm->hw[0]->sw_if_index,
+                                   ~0,
+                                   1,
+                                   NULL,
+                                   FIB_ROUTE_PATH_FLAG_NONE);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_s_64);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_2),
+            "%U via 3000::2",
+             format_fib_prefix, &pfx_2001_s_64);
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_0_1_s_128);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_2),
+            "%U via 3000::1",
+             format_fib_prefix, &pfx_2001_0_1_s_128);
+
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_1_s_96);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_1),
+            "%U via 3000::1",
+             format_fib_prefix, &pfx_2001_1_s_96);
+    fei = fib_table_lookup_exact_match(0, &pfx_2001_1_1_s_128);
+    FIB_TEST(fib_test_validate_entry(fei,
+                                    FIB_FORW_CHAIN_TYPE_UNICAST_IP6,
+                                    1,
+                                    &adj_o_3000_1),
+            "%U via 3000::1",
+             format_fib_prefix, &pfx_2001_1_1_s_128);
+
+    /*
+     * Cleanup
+     */
+    fib_table_entry_delete(0, &pfx_2001_0_1_s_128, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_2001_1_1_s_128, FIB_SOURCE_CLI);
+    fib_table_entry_delete(0, &pfx_2001_s_64,      FIB_SOURCE_API);
+    fib_table_entry_delete(0, &pfx_2001_1_s_96,    FIB_SOURCE_API);
+    adj_unlock(ai_3000_1);
+    adj_unlock(ai_3000_2);
 
+    /*
+     * test no-one left behind
+     */
+    FIB_TEST((n_feis == fib_entry_pool_size()), "Entries gone");
+    FIB_TEST(0 == adj_nbr_db_size(), "All adjacencies removed");
     return (0);
 }
 
@@ -7926,6 +9721,10 @@ fib_test (vlib_main_t * vm,
     {
        res += fib_test_ae();
     }
+    else if (unformat (input, "pref"))
+    {
+       res += fib_test_pref();
+    }
     else if (unformat (input, "lfib"))
     {
        res += lfib_test();
@@ -7938,20 +9737,27 @@ fib_test (vlib_main_t * vm,
     {
        res += fib_test_bfd();
     }
+    else if (unformat (input, "inherit"))
+    {
+       res += fib_test_inherit();
+    }
     else
     {
-        /*
-         * These walk UT aren't run as part of the full suite, since the
-         * fib-walk process must be disabled in order for the tests to work
-         *
-         * fib_test_walk();
-         */
        res += fib_test_v4();
        res += fib_test_v6();
        res += fib_test_ae();
        res += fib_test_bfd();
+       res += fib_test_pref();
        res += fib_test_label();
+        res += fib_test_inherit();
        res += lfib_test();
+
+        /*
+         * fib-walk process must be disabled in order for the walk tests to work
+         */
+        fib_walk_process_disable();
+        res += fib_test_walk();
+        fib_walk_process_enable();
     }
 
     if (res)