2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/vxlan/vxlan.h>
16 #include <vnet/ip/format.h>
17 #include <vnet/fib/fib_entry.h>
18 #include <vnet/fib/fib_table.h>
19 #include <vnet/mfib/mfib_table.h>
20 #include <vnet/adj/adj_mcast.h>
21 #include <vnet/adj/rewrite.h>
22 #include <vnet/interface.h>
23 #include <vlib/vlib.h>
29 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
30 * to span multiple servers. This is done by building an L2 overlay on
31 * top of an L3 network underlay using VXLAN tunnels.
33 * This makes it possible for servers to be co-located in the same data
34 * center or be separated geographically as long as they are reachable
35 * through the underlay L3 network.
37 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
38 * (Virtual eXtensible VLAN) segment.
42 vxlan_main_t vxlan_main;
44 static u8 * format_decap_next (u8 * s, va_list * args)
46 u32 next_index = va_arg (*args, u32);
48 if (next_index == VXLAN_INPUT_NEXT_DROP)
49 return format (s, "drop");
51 return format (s, "index %d", next_index);
55 u8 * format_vxlan_tunnel (u8 * s, va_list * args)
57 vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *);
60 "[%d] instance %d src %U dst %U vni %d fib-idx %d sw-if-idx %d ",
61 t->dev_instance, t->user_instance,
62 format_ip46_address, &t->src, IP46_TYPE_ANY,
63 format_ip46_address, &t->dst, IP46_TYPE_ANY,
64 t->vni, t->encap_fib_index, t->sw_if_index);
66 s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
68 if (PREDICT_FALSE (t->decap_next_index != VXLAN_INPUT_NEXT_L2_INPUT))
69 s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index);
71 if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst)))
72 s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index);
77 static u8 * format_vxlan_name (u8 * s, va_list * args)
79 u32 dev_instance = va_arg (*args, u32);
80 vxlan_main_t * vxm = &vxlan_main;
83 if (dev_instance == ~0)
84 return format(s, "<cached-unused>");
86 if (dev_instance >= vec_len(vxm->tunnels))
87 return format(s, "<improperly-referenced>");
89 t = pool_elt_at_index(vxm->tunnels, dev_instance);
91 return format (s, "vxlan_tunnel%d", t->user_instance);
95 vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
97 u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
98 VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
99 vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
101 return /* no error */ 0;
104 VNET_DEVICE_CLASS (vxlan_device_class,static) = {
106 .format_device_name = format_vxlan_name,
107 .format_tx_trace = format_vxlan_encap_trace,
108 .admin_up_down_function = vxlan_interface_admin_up_down,
111 static u8 * format_vxlan_header_with_length (u8 * s, va_list * args)
113 u32 dev_instance = va_arg (*args, u32);
114 s = format (s, "unimplemented dev %u", dev_instance);
118 VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
120 .format_header = format_vxlan_header_with_length,
121 .build_rewrite = default_build_rewrite,
125 vxlan_tunnel_restack_dpo(vxlan_tunnel_t * t)
127 u8 is_ip4 = ip46_address_is_ip4(&t->dst);
128 dpo_id_t dpo = DPO_INVALID;
129 fib_forward_chain_type_t forw_type = is_ip4 ?
130 FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
132 fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
134 /* vxlan uses the payload hash as the udp source port
135 * hence the packet's hash is unknown
136 * skip single bucket load balance dpo's */
137 while (DPO_LOAD_BALANCE == dpo.dpoi_type)
139 load_balance_t *lb = load_balance_get (dpo.dpoi_index);
140 if (lb->lb_n_buckets > 1)
143 dpo_copy (&dpo, load_balance_get_bucket_i (lb, 0));
146 u32 encap_index = is_ip4 ?
147 vxlan4_encap_node.index : vxlan6_encap_node.index;
148 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
152 static vxlan_tunnel_t *
153 vxlan_tunnel_from_fib_node (fib_node_t *node)
155 ASSERT(FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type);
156 return ((vxlan_tunnel_t*) (((char*)node) -
157 STRUCT_OFFSET_OF(vxlan_tunnel_t, node)));
161 * Function definition to backwalk a FIB node -
162 * Here we will restack the new dpo of VXLAN DIP to encap node.
164 static fib_node_back_walk_rc_t
165 vxlan_tunnel_back_walk (fib_node_t *node,
166 fib_node_back_walk_ctx_t *ctx)
168 vxlan_tunnel_restack_dpo(vxlan_tunnel_from_fib_node(node));
169 return (FIB_NODE_BACK_WALK_CONTINUE);
173 * Function definition to get a FIB node from its index
176 vxlan_tunnel_fib_node_get (fib_node_index_t index)
179 vxlan_main_t * vxm = &vxlan_main;
181 t = pool_elt_at_index(vxm->tunnels, index);
187 * Function definition to inform the FIB node that its last lock has gone.
190 vxlan_tunnel_last_lock_gone (fib_node_t *node)
193 * The VXLAN tunnel is a root of the graph. As such
194 * it never has children and thus is never locked.
200 * Virtual function table registered by VXLAN tunnels
201 * for participation in the FIB object graph.
203 const static fib_node_vft_t vxlan_vft = {
204 .fnv_get = vxlan_tunnel_fib_node_get,
205 .fnv_last_lock = vxlan_tunnel_last_lock_gone,
206 .fnv_back_walk = vxlan_tunnel_back_walk,
210 #define foreach_copy_field \
212 _(mcast_sw_if_index) \
214 _(decap_next_index) \
219 vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6)
222 ip4_vxlan_header_t h4;
223 ip6_vxlan_header_t h6;
225 int len = is_ip6 ? sizeof h.h6 : sizeof h.h4;
228 vxlan_header_t * vxlan;
229 /* Fixed portion of the (outer) ip header */
232 ip4_header_t * ip = &h.h4.ip4;
233 udp = &h.h4.udp, vxlan = &h.h4.vxlan;
234 ip->ip_version_and_header_length = 0x45;
236 ip->protocol = IP_PROTOCOL_UDP;
238 ip->src_address = t->src.ip4;
239 ip->dst_address = t->dst.ip4;
241 /* we fix up the ip4 header length and checksum after-the-fact */
242 ip->checksum = ip4_header_checksum (ip);
246 ip6_header_t * ip = &h.h6.ip6;
247 udp = &h.h6.udp, vxlan = &h.h6.vxlan;
248 ip->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(6 << 28);
250 ip->protocol = IP_PROTOCOL_UDP;
252 ip->src_address = t->src.ip6;
253 ip->dst_address = t->dst.ip6;
256 /* UDP header, randomize src port on something, maybe? */
257 udp->src_port = clib_host_to_net_u16 (4789);
258 udp->dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan);
261 vnet_set_vni_and_flags(vxlan, t->vni);
262 vnet_rewrite_set_data (*t, &h, len);
266 vxlan_decap_next_is_valid (vxlan_main_t * vxm, u32 is_ip6, u32 decap_next_index)
268 vlib_main_t * vm = vxm->vlib_main;
269 u32 input_idx = (!is_ip6) ? vxlan4_input_node.index : vxlan6_input_node.index;
270 vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx);
272 return decap_next_index < r->n_next_nodes;
276 vtep_addr_ref(ip46_address_t *ip)
278 uword *vtep = ip46_address_is_ip4(ip) ?
279 hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
280 hash_get_mem (vxlan_main.vtep6, &ip->ip6);
283 ip46_address_is_ip4(ip) ?
284 hash_set (vxlan_main.vtep4, ip->ip4.as_u32, 1) :
285 hash_set_mem_alloc (&vxlan_main.vtep6, &ip->ip6, 1);
290 vtep_addr_unref(ip46_address_t *ip)
292 uword *vtep = ip46_address_is_ip4(ip) ?
293 hash_get (vxlan_main.vtep4, ip->ip4.as_u32) :
294 hash_get_mem (vxlan_main.vtep6, &ip->ip6);
298 ip46_address_is_ip4(ip) ?
299 hash_unset (vxlan_main.vtep4, ip->ip4.as_u32) :
300 hash_unset_mem_free (&vxlan_main.vtep6, &ip->ip6);
304 typedef CLIB_PACKED(union {
306 fib_node_index_t mfib_entry_index;
307 adj_index_t mcast_adj_index;
312 static inline mcast_shared_t
313 mcast_shared_get(ip46_address_t * ip)
315 ASSERT(ip46_address_is_multicast(ip));
316 uword * p = hash_get_mem (vxlan_main.mcast_shared, ip);
318 return (mcast_shared_t) { .as_u64 = *p };
322 mcast_shared_add(ip46_address_t *dst,
323 fib_node_index_t mfei,
326 mcast_shared_t new_ep = {
327 .mcast_adj_index = ai,
328 .mfib_entry_index = mfei,
331 hash_set_mem_alloc (&vxlan_main.mcast_shared, dst, new_ep.as_u64);
335 mcast_shared_remove(ip46_address_t *dst)
337 mcast_shared_t ep = mcast_shared_get(dst);
339 adj_unlock(ep.mcast_adj_index);
340 mfib_table_entry_delete_index(ep.mfib_entry_index,
343 hash_unset_mem_free (&vxlan_main.mcast_shared, dst);
346 int vnet_vxlan_add_del_tunnel
347 (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
349 vxlan_main_t * vxm = &vxlan_main;
350 vxlan_tunnel_t *t = 0;
351 vnet_main_t * vnm = vxm->vnet_main;
353 u32 sw_if_index = ~0;
354 vxlan4_tunnel_key_t key4;
355 vxlan6_tunnel_key_t key6;
356 u32 is_ip6 = a->is_ip6;
360 key4.src = a->dst.ip4.as_u32; /* decap src in key is encap dst in config */
361 key4.vni = clib_host_to_net_u32 (a->vni << 8);
362 p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64);
366 key6.src = a->dst.ip6;
367 key6.vni = clib_host_to_net_u32 (a->vni << 8);
368 p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6);
373 l2input_main_t * l2im = &l2input_main;
374 u32 dev_instance; /* real dev instance tunnel index */
375 u32 user_instance; /* request and actual instance number */
377 /* adding a tunnel: tunnel must not already exist */
379 return VNET_API_ERROR_TUNNEL_EXIST;
381 /*if not set explicitly, default to l2 */
382 if(a->decap_next_index == ~0)
383 a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
384 if (!vxlan_decap_next_is_valid(vxm, is_ip6, a->decap_next_index))
385 return VNET_API_ERROR_INVALID_DECAP_NEXT;
387 pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
388 *t = (vxlan_tunnel_t){ 0 };
389 dev_instance = t - vxm->tunnels;
391 /* copy from arg structure */
392 #define _(x) t->x = a->x;
396 vxlan_rewrite (t, is_ip6);
398 * Reconcile the real dev_instance and a possible requested instance.
400 user_instance = a->instance;
401 if (user_instance == ~0)
402 user_instance = dev_instance;
403 if (hash_get (vxm->instance_used, user_instance))
405 pool_put (vxm->tunnels, t);
406 return VNET_API_ERROR_INSTANCE_IN_USE;
408 hash_set (vxm->instance_used, user_instance, 1);
410 t->dev_instance = dev_instance; /* actual */
411 t->user_instance = user_instance; /* name */
415 hash_set_mem_alloc (&vxm->vxlan6_tunnel_by_key, &key6, dev_instance);
417 hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, dev_instance);
419 t->hw_if_index = vnet_register_interface
420 (vnm, vxlan_device_class.index, dev_instance,
421 vxlan_hw_class.index, dev_instance);
422 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, t->hw_if_index);
424 /* Set vxlan tunnel output node */
425 u32 encap_index = !is_ip6 ?
426 vxlan4_encap_node.index : vxlan6_encap_node.index;
427 vnet_set_interface_output_node (vnm, t->hw_if_index, encap_index);
429 t->sw_if_index = sw_if_index = hi->sw_if_index;
431 vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
432 vxm->tunnel_index_by_sw_if_index[sw_if_index] = dev_instance;
434 /* setup l2 input config with l2 feature and bd 0 to drop packet */
435 vec_validate (l2im->configs, sw_if_index);
436 l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
437 l2im->configs[sw_if_index].bd_index = 0;
439 vnet_sw_interface_t * si = vnet_get_sw_interface (vnm, sw_if_index);
440 si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN;
441 vnet_sw_interface_set_flags (vnm, sw_if_index,
442 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
444 fib_node_init(&t->node, FIB_NODE_TYPE_VXLAN_TUNNEL);
445 fib_prefix_t tun_dst_pfx;
446 vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
448 fib_prefix_from_ip46_addr(&t->dst, &tun_dst_pfx);
449 if (!ip46_address_is_multicast(&t->dst))
452 * source the FIB entry for the tunnel's destination
453 * and become a child thereof. The tunnel will then get poked
454 * when the forwarding for the entry updates, and the tunnel can
455 * re-stack accordingly
457 vtep_addr_ref(&t->src);
458 t->fib_entry_index = fib_table_entry_special_add
459 (t->encap_fib_index, &tun_dst_pfx, FIB_SOURCE_RR,
460 FIB_ENTRY_FLAG_NONE);
461 t->sibling_index = fib_entry_child_add
462 (t->fib_entry_index, FIB_NODE_TYPE_VXLAN_TUNNEL, dev_instance);
463 vxlan_tunnel_restack_dpo(t);
467 /* Multicast tunnel -
468 * as the same mcast group can be used for mutiple mcast tunnels
469 * with different VNIs, create the output fib adjecency only if
470 * it does not already exist
472 fib_protocol_t fp = fib_ip_proto(is_ip6);
474 if (vtep_addr_ref(&t->dst) == 1)
476 fib_node_index_t mfei;
478 fib_route_path_t path = {
479 .frp_proto = fib_proto_to_dpo(fp),
480 .frp_addr = zero_addr,
481 .frp_sw_if_index = 0xffffffff,
484 .frp_flags = FIB_ROUTE_PATH_LOCAL,
486 const mfib_prefix_t mpfx = {
488 .fp_len = (is_ip6 ? 128 : 32),
489 .fp_grp_addr = tun_dst_pfx.fp_addr,
493 * Setup the (*,G) to receive traffic on the mcast group
494 * - the forwarding interface is for-us
495 * - the accepting interface is that from the API
497 mfib_table_entry_path_update(t->encap_fib_index,
501 MFIB_ITF_FLAG_FORWARD);
503 path.frp_sw_if_index = a->mcast_sw_if_index;
504 path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
505 mfei = mfib_table_entry_path_update(t->encap_fib_index,
509 MFIB_ITF_FLAG_ACCEPT);
512 * Create the mcast adjacency to send traffic to the group
514 ai = adj_mcast_add_or_lock(fp,
515 fib_proto_to_link(fp),
516 a->mcast_sw_if_index);
519 * create a new end-point
521 mcast_shared_add(&t->dst, mfei, ai);
524 dpo_id_t dpo = DPO_INVALID;
525 mcast_shared_t ep = mcast_shared_get(&t->dst);
527 /* Stack shared mcast dst mac addr rewrite on encap */
528 dpo_set (&dpo, DPO_ADJACENCY_MCAST,
529 fib_proto_to_dpo(fp),
532 dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
534 flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
537 vnet_get_sw_interface (vnet_get_main(), sw_if_index)->flood_class = flood_class;
541 /* deleting a tunnel: tunnel must exist */
543 return VNET_API_ERROR_NO_SUCH_ENTRY;
546 t = pool_elt_at_index (vxm->tunnels, instance);
548 sw_if_index = t->sw_if_index;
549 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */);
551 vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
554 hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64);
556 hash_unset_mem_free (&vxm->vxlan6_tunnel_by_key, &key6);
558 if (!ip46_address_is_multicast(&t->dst))
560 vtep_addr_unref(&t->src);
561 fib_entry_child_remove(t->fib_entry_index, t->sibling_index);
562 fib_table_entry_delete_index(t->fib_entry_index, FIB_SOURCE_RR);
564 else if (vtep_addr_unref(&t->dst) == 0)
566 mcast_shared_remove(&t->dst);
569 vnet_delete_hw_interface (vnm, t->hw_if_index);
570 hash_unset (vxm->instance_used, t->user_instance);
572 fib_node_deinit(&t->node);
573 pool_put (vxm->tunnels, t);
577 *sw_if_indexp = sw_if_index;
582 static uword get_decap_next_for_node(u32 node_index, u32 ipv4_set)
584 vxlan_main_t * vxm = &vxlan_main;
585 vlib_main_t * vm = vxm->vlib_main;
586 uword input_node = (ipv4_set) ? vxlan4_input_node.index :
587 vxlan6_input_node.index;
589 return vlib_node_add_next (vm, input_node, node_index);
592 static uword unformat_decap_next (unformat_input_t * input, va_list * args)
594 u32 * result = va_arg (*args, u32 *);
595 u32 ipv4_set = va_arg (*args, int);
596 vxlan_main_t * vxm = &vxlan_main;
597 vlib_main_t * vm = vxm->vlib_main;
601 if (unformat (input, "l2"))
602 *result = VXLAN_INPUT_NEXT_L2_INPUT;
603 else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
604 *result = get_decap_next_for_node(node_index, ipv4_set);
605 else if (unformat (input, "%d", &tmp))
612 static clib_error_t *
613 vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
614 unformat_input_t * input,
615 vlib_cli_command_t * cmd)
617 unformat_input_t _line_input, * line_input = &_line_input;
618 ip46_address_t src = ip46_address_initializer, dst = ip46_address_initializer;
626 u32 encap_fib_index = 0;
627 u32 mcast_sw_if_index = ~0;
628 u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
631 clib_error_t *error = NULL;
633 /* Get a line of input. */
634 if (! unformat_user (input, unformat_line_input, line_input))
637 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
638 if (unformat (line_input, "del"))
642 else if (unformat (line_input, "instance %d", &instance))
644 else if (unformat (line_input, "src %U",
645 unformat_ip46_address, &src, IP46_TYPE_ANY))
648 ip46_address_is_ip4(&src) ? (ipv4_set = 1) : (ipv6_set = 1);
650 else if (unformat (line_input, "dst %U",
651 unformat_ip46_address, &dst, IP46_TYPE_ANY))
654 ip46_address_is_ip4(&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
656 else if (unformat (line_input, "group %U %U",
657 unformat_ip46_address, &dst, IP46_TYPE_ANY,
658 unformat_vnet_sw_interface,
659 vnet_get_main(), &mcast_sw_if_index))
661 grp_set = dst_set = 1;
662 ip46_address_is_ip4(&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
664 else if (unformat (line_input, "encap-vrf-id %d", &table_id))
666 encap_fib_index = fib_table_find (fib_ip_proto (ipv6_set), table_id);
667 if (encap_fib_index == ~0)
669 error = clib_error_return (0, "nonexistent encap-vrf-id %d", table_id);
673 else if (unformat (line_input, "decap-next %U", unformat_decap_next,
674 &decap_next_index, ipv4_set))
676 else if (unformat (line_input, "vni %d", &vni))
680 error = clib_error_return (0, "parse error: '%U'",
681 format_unformat_error, line_input);
686 unformat_free (line_input);
692 return clib_error_return (0, "tunnel src address not specified");
695 return clib_error_return (0, "tunnel dst address not specified");
697 if (grp_set && !ip46_address_is_multicast(&dst))
698 return clib_error_return (0, "tunnel group address not multicast");
700 if (grp_set == 0 && ip46_address_is_multicast(&dst))
701 return clib_error_return (0, "dst address must be unicast");
703 if (grp_set && mcast_sw_if_index == ~0)
704 return clib_error_return (0, "tunnel nonexistent multicast device");
706 if (ipv4_set && ipv6_set)
707 return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
709 if (ip46_address_cmp(&src, &dst) == 0)
710 return clib_error_return (0, "src and dst addresses are identical");
712 if (decap_next_index == ~0)
713 return clib_error_return (0, "next node not found");
716 return clib_error_return (0, "vni not specified");
719 return clib_error_return (0, "vni %d out of range", vni);
721 vnet_vxlan_add_del_tunnel_args_t a = {
724 .instance = instance,
730 u32 tunnel_sw_if_index;
731 int rv = vnet_vxlan_add_del_tunnel (&a, &tunnel_sw_if_index);
737 vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name,
738 vnet_get_main(), tunnel_sw_if_index);
741 case VNET_API_ERROR_TUNNEL_EXIST:
742 return clib_error_return (0, "tunnel already exists...");
744 case VNET_API_ERROR_NO_SUCH_ENTRY:
745 return clib_error_return (0, "tunnel does not exist...");
747 case VNET_API_ERROR_INSTANCE_IN_USE:
748 return clib_error_return (0, "Instance is in use");
751 return clib_error_return
752 (0, "vnet_vxlan_add_del_tunnel returned %d", rv);
759 * Add or delete a VXLAN Tunnel.
761 * VXLAN provides the features needed to allow L2 bridge domains (BDs)
762 * to span multiple servers. This is done by building an L2 overlay on
763 * top of an L3 network underlay using VXLAN tunnels.
765 * This makes it possible for servers to be co-located in the same data
766 * center or be separated geographically as long as they are reachable
767 * through the underlay L3 network.
769 * You can refer to this kind of L2 overlay bridge domain as a VXLAN
770 * (Virtual eXtensible VLAN) segment.
773 * Example of how to create a VXLAN Tunnel:
774 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id 7}
775 * Example of how to create a VXLAN Tunnel with a known name, vxlan_tunnel42:
776 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 instance 42}
777 * Example of how to delete a VXLAN Tunnel:
778 * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del}
781 VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
782 .path = "create vxlan tunnel",
784 "create vxlan tunnel src <local-vtep-addr>"
785 " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
787 " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del]",
788 .function = vxlan_add_del_tunnel_command_fn,
792 static clib_error_t *
793 show_vxlan_tunnel_command_fn (vlib_main_t * vm,
794 unformat_input_t * input,
795 vlib_cli_command_t * cmd)
797 vxlan_main_t * vxm = &vxlan_main;
800 if (pool_elts (vxm->tunnels) == 0)
801 vlib_cli_output (vm, "No vxlan tunnels configured...");
803 pool_foreach (t, vxm->tunnels,
805 vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
812 * Display all the VXLAN Tunnel entries.
815 * Example of how to display the VXLAN Tunnel entries:
816 * @cliexstart{show vxlan tunnel}
817 * [0] src 10.0.3.1 dst 10.0.3.3 vni 13 encap_fib_index 0 sw_if_index 5 decap_next l2
821 VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
822 .path = "show vxlan tunnel",
823 .short_help = "show vxlan tunnel",
824 .function = show_vxlan_tunnel_command_fn,
829 void vnet_int_vxlan_bypass_mode (u32 sw_if_index,
834 vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass",
835 sw_if_index, is_enable, 0, 0);
837 vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass",
838 sw_if_index, is_enable, 0, 0);
842 static clib_error_t *
843 set_ip_vxlan_bypass (u32 is_ip6,
844 unformat_input_t * input,
845 vlib_cli_command_t * cmd)
847 unformat_input_t _line_input, * line_input = &_line_input;
848 vnet_main_t * vnm = vnet_get_main();
849 clib_error_t * error = 0;
850 u32 sw_if_index, is_enable;
855 if (! unformat_user (input, unformat_line_input, line_input))
858 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
860 if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
862 else if (unformat (line_input, "del"))
866 error = unformat_parse_error (line_input);
871 if (~0 == sw_if_index)
873 error = clib_error_return (0, "unknown interface `%U'",
874 format_unformat_error, line_input);
878 vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable);
881 unformat_free (line_input);
886 static clib_error_t *
887 set_ip4_vxlan_bypass (vlib_main_t * vm,
888 unformat_input_t * input,
889 vlib_cli_command_t * cmd)
891 return set_ip_vxlan_bypass (0, input, cmd);
895 * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
896 * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
897 * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
898 * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
899 * cause extra overhead to for non-vxlan packets which is kept at a minimum.
903 * Example of graph node before ip4-vxlan-bypass is enabled:
904 * @cliexstart{show vlib graph ip4-vxlan-bypass}
906 * ip4-vxlan-bypass error-drop [0]
911 * Example of how to enable ip4-vxlan-bypass on an interface:
912 * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
914 * Example of graph node after ip4-vxlan-bypass is enabled:
915 * @cliexstart{show vlib graph ip4-vxlan-bypass}
917 * ip4-vxlan-bypass error-drop [0] ip4-input
918 * vxlan4-input [1] ip4-input-no-checksum
922 * Example of how to display the feature enabed on an interface:
923 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
924 * IP feature paths configured on GigabitEthernet2/0/0...
932 * Example of how to disable ip4-vxlan-bypass on an interface:
933 * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
937 VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
938 .path = "set interface ip vxlan-bypass",
939 .function = set_ip4_vxlan_bypass,
940 .short_help = "set interface ip vxlan-bypass <interface> [del]",
944 static clib_error_t *
945 set_ip6_vxlan_bypass (vlib_main_t * vm,
946 unformat_input_t * input,
947 vlib_cli_command_t * cmd)
949 return set_ip_vxlan_bypass (1, input, cmd);
953 * This command adds the 'ip6-vxlan-bypass' graph node for a given interface.
954 * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks
955 * for and validate input vxlan packet and bypass ip6-lookup, ip6-local,
956 * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will
957 * cause extra overhead to for non-vxlan packets which is kept at a minimum.
961 * Example of graph node before ip6-vxlan-bypass is enabled:
962 * @cliexstart{show vlib graph ip6-vxlan-bypass}
964 * ip6-vxlan-bypass error-drop [0]
969 * Example of how to enable ip6-vxlan-bypass on an interface:
970 * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0}
972 * Example of graph node after ip6-vxlan-bypass is enabled:
973 * @cliexstart{show vlib graph ip6-vxlan-bypass}
975 * ip6-vxlan-bypass error-drop [0] ip6-input
976 * vxlan6-input [1] ip4-input-no-checksum
980 * Example of how to display the feature enabed on an interface:
981 * @cliexstart{show ip interface features GigabitEthernet2/0/0}
982 * IP feature paths configured on GigabitEthernet2/0/0...
990 * Example of how to disable ip6-vxlan-bypass on an interface:
991 * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del}
995 VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = {
996 .path = "set interface ip6 vxlan-bypass",
997 .function = set_ip6_vxlan_bypass,
998 .short_help = "set interface ip vxlan-bypass <interface> [del]",
1002 clib_error_t *vxlan_init (vlib_main_t *vm)
1004 vxlan_main_t * vxm = &vxlan_main;
1006 vxm->vnet_main = vnet_get_main();
1007 vxm->vlib_main = vm;
1009 /* initialize the ip6 hash */
1010 vxm->vxlan6_tunnel_by_key = hash_create_mem(0,
1011 sizeof(vxlan6_tunnel_key_t),
1013 vxm->vtep6 = hash_create_mem(0,
1014 sizeof(ip6_address_t),
1016 vxm->mcast_shared = hash_create_mem(0,
1017 sizeof(ip46_address_t),
1018 sizeof(mcast_shared_t));
1020 udp_register_dst_port (vm, UDP_DST_PORT_vxlan,
1021 vxlan4_input_node.index, /* is_ip4 */ 1);
1022 udp_register_dst_port (vm, UDP_DST_PORT_vxlan6,
1023 vxlan6_input_node.index, /* is_ip4 */ 0);
1025 fib_node_register_type(FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft);
1030 VLIB_INIT_FUNCTION(vxlan_init);
1034 * eval: (c-set-style "gnu")