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diff --git a/src/vnet/ip/ip_interface.h b/src/vnet/ip/ip_interface.h
new file mode 100644
index 00000000000..f95b8deb07b
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+++ b/src/vnet/ip/ip_interface.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file
+ * @brief IP prefix management on interfaces
+ */
+
+#ifndef included_ip_interface_h
+#define included_ip_interface_h
+
+#include <vnet/ip/lookup.h>
+
+clib_error_t *ip_interface_address_add (ip_lookup_main_t * lm,
+					u32 sw_if_index,
+					void *address,
+					u32 address_length,
+					u32 * result_index);
+void ip_interface_address_del (ip_lookup_main_t * lm,
+			       u32 addr_index, void *address);
+void *ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4);
+void ip_interface_address_mark (void);
+void ip_interface_address_sweep (void);
+u32 ip_interface_address_find (ip_lookup_main_t * lm,
+			       void *addr_fib, u32 address_length);
+u8 ip_interface_has_address (u32 sw_if_index, ip46_address_t * ip, u8 is_ip4);
+
+always_inline void *
+ip_interface_address_get_address (ip_lookup_main_t * lm,
+				  ip_interface_address_t * a)
+{
+  return mhash_key_to_mem (&lm->address_to_if_address_index, a->address_key);
+}
+
+always_inline ip_interface_prefix_t *
+ip_get_interface_prefix (ip_lookup_main_t * lm, ip_interface_prefix_key_t * k)
+{
+  uword *p = mhash_get (&lm->prefix_to_if_prefix_index, k);
+  return p ? pool_elt_at_index (lm->if_prefix_pool, p[0]) : 0;
+}
+
+/* *INDENT-OFF* */
+#define foreach_ip_interface_address(lm,a,sw_if_index,loop,body)        \
+do {                                                                    \
+    vnet_main_t *_vnm = vnet_get_main();                                \
+    u32 _sw_if_index = sw_if_index;                                     \
+    vnet_sw_interface_t *_swif;                                         \
+    _swif = vnet_get_sw_interface (_vnm, _sw_if_index);                 \
+                                                                        \
+    /*                                                                  \
+     * Loop => honor unnumbered interface addressing.                   \
+     */                                                                 \
+    if (_swif->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED)               \
+      {                                                                 \
+        if (loop)                                                       \
+          _sw_if_index = _swif->unnumbered_sw_if_index;                 \
+        else                                                            \
+          /* the interface is unnumbered, by the caller does not want   \
+           * unnumbered interfaces considered/honoured */               \
+          break;                                                        \
+      }                                                                 \
+    u32 _ia = ((vec_len((lm)->if_address_pool_index_by_sw_if_index)     \
+                > (_sw_if_index)) ?                                     \
+               vec_elt ((lm)->if_address_pool_index_by_sw_if_index,     \
+                        (_sw_if_index)) :                               \
+               (u32)~0);                                                \
+    ip_interface_address_t * _a;                                        \
+    while (_ia != ~0)                                                   \
+    {                                                                   \
+        _a = pool_elt_at_index ((lm)->if_address_pool, _ia);            \
+        _ia = _a->next_this_sw_interface;                               \
+        (a) = _a;                                                       \
+        body;                                                           \
+    }                                                                   \
+} while (0)
+/* *INDENT-ON* */
+
+#endif /* included_ip_interface_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */