2 * Zebra EVPN Neighbor code
3 * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
5 * This file is part of FRR.
7 * FRR is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * FRR is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with FRR; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26 #include "interface.h"
33 #include "zebra/zserv.h"
34 #include "zebra/debug.h"
35 #include "zebra/zebra_router.h"
37 #include "zebra/zebra_errors.h"
38 #include "zebra/zebra_vrf.h"
39 #include "zebra/zebra_evpn.h"
40 #include "zebra/zebra_evpn_mh.h"
41 #include "zebra/zebra_evpn_neigh.h"
42 #include "zebra/zebra_evpn_mac.h"
44 DEFINE_MTYPE_STATIC(ZEBRA
, NEIGH
, "EVI Neighbor");
47 * Make hash key for neighbors.
49 static unsigned int neigh_hash_keymake(const void *p
)
51 const struct zebra_neigh
*n
= p
;
52 const struct ipaddr
*ip
= &n
->ip
;
55 return jhash_1word(ip
->ipaddr_v4
.s_addr
, 0);
57 return jhash2(ip
->ipaddr_v6
.s6_addr32
,
58 array_size(ip
->ipaddr_v6
.s6_addr32
), 0);
62 * Compare two neighbor hash structures.
64 static bool neigh_cmp(const void *p1
, const void *p2
)
66 const struct zebra_neigh
*n1
= p1
;
67 const struct zebra_neigh
*n2
= p2
;
69 if (n1
== NULL
&& n2
== NULL
)
72 if (n1
== NULL
|| n2
== NULL
)
75 return ipaddr_cmp(&n1
->ip
, &n2
->ip
) == 0;
78 int neigh_list_cmp(void *p1
, void *p2
)
80 const struct zebra_neigh
*n1
= p1
;
81 const struct zebra_neigh
*n2
= p2
;
83 return ipaddr_cmp(&n1
->ip
, &n2
->ip
);
86 struct hash
*zebra_neigh_db_create(const char *desc
)
88 return hash_create_size(8, neigh_hash_keymake
, neigh_cmp
, desc
);
91 uint32_t num_dup_detected_neighs(struct zebra_evpn
*zevpn
)
94 uint32_t num_neighs
= 0;
96 struct hash_bucket
*hb
;
97 struct zebra_neigh
*nbr
;
99 hash
= zevpn
->neigh_table
;
102 for (i
= 0; i
< hash
->size
; i
++) {
103 for (hb
= hash
->index
[i
]; hb
; hb
= hb
->next
) {
104 nbr
= (struct zebra_neigh
*)hb
->data
;
105 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
))
114 * Helper function to determine maximum width of neighbor IP address for
115 * display - just because we're dealing with IPv6 addresses that can
118 void zebra_evpn_find_neigh_addr_width(struct hash_bucket
*bucket
, void *ctxt
)
120 struct zebra_neigh
*n
;
121 char buf
[INET6_ADDRSTRLEN
];
122 struct neigh_walk_ctx
*wctx
= ctxt
;
125 n
= (struct zebra_neigh
*)bucket
->data
;
127 ipaddr2str(&n
->ip
, buf
, sizeof(buf
));
129 if (width
> wctx
->addr_width
)
130 wctx
->addr_width
= width
;
134 * Count of remote neighbors referencing this MAC.
136 int remote_neigh_count(struct zebra_mac
*zmac
)
138 struct zebra_neigh
*n
= NULL
;
139 struct listnode
*node
= NULL
;
142 for (ALL_LIST_ELEMENTS_RO(zmac
->neigh_list
, node
, n
)) {
143 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
))
151 * Install remote neighbor into the kernel.
153 int zebra_evpn_rem_neigh_install(struct zebra_evpn
*zevpn
,
154 struct zebra_neigh
*n
, bool was_static
)
156 struct interface
*vlan_if
;
160 if (!(n
->flags
& ZEBRA_NEIGH_REMOTE
))
163 vlan_if
= zevpn_map_to_svi(zevpn
);
167 flags
= DPLANE_NTF_EXT_LEARNED
;
168 if (n
->flags
& ZEBRA_NEIGH_ROUTER_FLAG
)
169 flags
|= DPLANE_NTF_ROUTER
;
170 ZEBRA_NEIGH_SET_ACTIVE(n
);
172 dplane_rem_neigh_add(vlan_if
, &n
->ip
, &n
->emac
, flags
, was_static
);
178 * Install neighbor hash entry - called upon access VLAN change.
180 void zebra_evpn_install_neigh_hash(struct hash_bucket
*bucket
, void *ctxt
)
182 struct zebra_neigh
*n
;
183 struct neigh_walk_ctx
*wctx
= ctxt
;
185 n
= (struct zebra_neigh
*)bucket
->data
;
187 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
))
188 zebra_evpn_rem_neigh_install(wctx
->zevpn
, n
,
189 false /*was_static*/);
193 * Callback to allocate neighbor hash entry.
195 static void *zebra_evpn_neigh_alloc(void *p
)
197 const struct zebra_neigh
*tmp_n
= p
;
198 struct zebra_neigh
*n
;
200 n
= XCALLOC(MTYPE_NEIGH
, sizeof(struct zebra_neigh
));
206 static void zebra_evpn_local_neigh_ref_mac(struct zebra_neigh
*n
,
207 const struct ethaddr
*macaddr
,
208 struct zebra_mac
*mac
,
209 bool send_mac_update
)
214 memcpy(&n
->emac
, macaddr
, ETH_ALEN
);
217 /* Link to new MAC */
221 listnode_add_sort(mac
->neigh_list
, n
);
222 if (n
->flags
& ZEBRA_NEIGH_ALL_PEER_FLAGS
) {
223 old_static
= zebra_evpn_mac_is_static(mac
);
224 ++mac
->sync_neigh_cnt
;
225 new_static
= zebra_evpn_mac_is_static(mac
);
226 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
228 "sync-neigh ref mac vni %u ip %pIA mac %pEA ref %d",
229 n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
230 mac
->sync_neigh_cnt
);
231 if ((old_static
!= new_static
) && send_mac_update
)
232 /* program the local mac in the kernel */
233 zebra_evpn_sync_mac_dp_install(
234 mac
, false /*set_inactive*/,
235 false /*force_clear_static*/, __func__
);
239 /* sync-path that is active on an ES peer */
240 static void zebra_evpn_sync_neigh_dp_install(struct zebra_neigh
*n
,
242 bool force_clear_static
,
245 struct zebra_ns
*zns
;
246 struct interface
*ifp
;
250 zns
= zebra_ns_lookup(NS_DEFAULT
);
251 ifp
= if_lookup_by_index_per_ns(zns
, n
->ifindex
);
253 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
255 "%s: dp-install sync-neigh vni %u ip %pIA mac %pEA if %d f 0x%x skipped",
256 caller
, n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
257 n
->ifindex
, n
->flags
);
261 if (force_clear_static
)
264 set_static
= zebra_evpn_neigh_is_static(n
);
266 set_router
= !!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
268 /* XXX - this will change post integration with the new kernel */
269 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
))
272 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
274 "%s: dp-install sync-neigh vni %u ip %pIA mac %pEA if %s(%d) f 0x%x%s%s%s",
275 caller
, n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
276 ifp
->name
, n
->ifindex
, n
->flags
,
277 set_router
? " router" : "",
278 set_static
? " static" : "",
279 set_inactive
? " inactive" : "");
280 dplane_local_neigh_add(ifp
, &n
->ip
, &n
->emac
, set_router
, set_static
,
285 * Inform BGP about local neighbor addition.
287 int zebra_evpn_neigh_send_add_to_client(vni_t vni
, const struct ipaddr
*ip
,
288 const struct ethaddr
*macaddr
,
289 struct zebra_mac
*zmac
,
290 uint32_t neigh_flags
, uint32_t seq
)
294 if (CHECK_FLAG(neigh_flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
)) {
295 /* host reachability has not been verified locally */
297 /* if no ES peer is claiming reachability we can't advertise
300 if (!CHECK_FLAG(neigh_flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
))
303 /* ES peers are claiming reachability; we will
304 * advertise the entry but with a proxy flag
306 SET_FLAG(flags
, ZEBRA_MACIP_TYPE_PROXY_ADVERT
);
309 if (CHECK_FLAG(neigh_flags
, ZEBRA_NEIGH_DEF_GW
))
310 SET_FLAG(flags
, ZEBRA_MACIP_TYPE_GW
);
311 /* Set router flag (R-bit) based on local neigh entry add */
312 if (CHECK_FLAG(neigh_flags
, ZEBRA_NEIGH_ROUTER_FLAG
))
313 SET_FLAG(flags
, ZEBRA_MACIP_TYPE_ROUTER_FLAG
);
314 if (CHECK_FLAG(neigh_flags
, ZEBRA_NEIGH_SVI_IP
))
315 SET_FLAG(flags
, ZEBRA_MACIP_TYPE_SVI_IP
);
317 return zebra_evpn_macip_send_msg_to_client(vni
, macaddr
, ip
, flags
, seq
,
318 ZEBRA_NEIGH_ACTIVE
, zmac
->es
,
323 * Inform BGP about local neighbor deletion.
325 int zebra_evpn_neigh_send_del_to_client(vni_t vni
, struct ipaddr
*ip
,
326 struct ethaddr
*macaddr
, uint32_t flags
,
327 int state
, bool force
)
330 if (CHECK_FLAG(flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
)
331 && !CHECK_FLAG(flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
))
332 /* the neigh was not advertised - nothing to delete */
336 return zebra_evpn_macip_send_msg_to_client(
337 vni
, macaddr
, ip
, flags
, 0, state
, NULL
, ZEBRA_MACIP_DEL
);
340 static void zebra_evpn_neigh_send_add_del_to_client(struct zebra_neigh
*n
,
345 zebra_evpn_neigh_send_add_to_client(n
->zevpn
->vni
, &n
->ip
,
346 &n
->emac
, n
->mac
, n
->flags
,
348 else if (old_bgp_ready
)
349 zebra_evpn_neigh_send_del_to_client(n
->zevpn
->vni
, &n
->ip
,
351 n
->state
, true /*force*/);
354 /* if the static flag associated with the neigh changes we need
355 * to update the sync-neigh references against the MAC
356 * and inform the dataplane about the static flag changes.
358 void zebra_evpn_sync_neigh_static_chg(struct zebra_neigh
*n
, bool old_n_static
,
359 bool new_n_static
, bool defer_n_dp
,
360 bool defer_mac_dp
, const char *caller
)
362 struct zebra_mac
*mac
= n
->mac
;
366 if (old_n_static
== new_n_static
)
369 /* update the neigh sync references in the dataplane. if
370 * the neigh is in the middle of updates the caller can
371 * request for a defer
374 zebra_evpn_sync_neigh_dp_install(n
, false /* set_inactive */,
375 false /* force_clear_static */,
381 /* update the mac sync ref cnt */
382 old_mac_static
= zebra_evpn_mac_is_static(mac
);
384 ++mac
->sync_neigh_cnt
;
385 } else if (old_n_static
) {
386 if (mac
->sync_neigh_cnt
)
387 --mac
->sync_neigh_cnt
;
389 new_mac_static
= zebra_evpn_mac_is_static(mac
);
391 /* update the mac sync references in the dataplane */
392 if ((old_mac_static
!= new_mac_static
) && !defer_mac_dp
)
393 zebra_evpn_sync_mac_dp_install(mac
, false /* set_inactive */,
394 false /* force_clear_static */,
397 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
399 "sync-neigh ref-chg vni %u ip %pIA mac %pEA f 0x%x %d%s%s%s%s by %s",
400 n
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
402 old_n_static
? " old_n_static" : "",
403 new_n_static
? " new_n_static" : "",
404 old_mac_static
? " old_mac_static" : "",
405 new_mac_static
? " new_mac_static" : "", caller
);
408 /* Neigh hold timer is used to age out peer-active flag.
410 * During this wait time we expect the dataplane component or an
411 * external neighmgr daemon to probe existing hosts to independently
412 * establish their presence on the ES.
414 static void zebra_evpn_neigh_hold_exp_cb(struct thread
*t
)
416 struct zebra_neigh
*n
;
423 /* the purpose of the hold timer is to age out the peer-active
426 if (!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
))
429 old_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
430 old_n_static
= zebra_evpn_neigh_is_static(n
);
431 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
);
432 new_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
433 new_n_static
= zebra_evpn_neigh_is_static(n
);
435 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
436 zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x hold expired",
437 n
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
);
439 /* re-program the local neigh in the dataplane if the neigh is no
442 if (old_n_static
!= new_n_static
)
443 zebra_evpn_sync_neigh_static_chg(
444 n
, old_n_static
, new_n_static
, false /*defer_n_dp*/,
445 false /*defer_mac_dp*/, __func__
);
447 /* inform bgp if needed */
448 if (old_bgp_ready
!= new_bgp_ready
)
449 zebra_evpn_neigh_send_add_del_to_client(n
, old_bgp_ready
,
453 static inline void zebra_evpn_neigh_start_hold_timer(struct zebra_neigh
*n
)
458 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
459 zlog_debug("sync-neigh vni %u ip %pIA mac %pEA 0x%x hold start",
460 n
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
);
461 thread_add_timer(zrouter
.master
, zebra_evpn_neigh_hold_exp_cb
, n
,
462 zmh_info
->neigh_hold_time
, &n
->hold_timer
);
465 static void zebra_evpn_local_neigh_deref_mac(struct zebra_neigh
*n
,
466 bool send_mac_update
)
468 struct zebra_mac
*mac
= n
->mac
;
469 struct zebra_evpn
*zevpn
= n
->zevpn
;
477 if ((n
->flags
& ZEBRA_NEIGH_ALL_PEER_FLAGS
) && mac
->sync_neigh_cnt
) {
478 old_static
= zebra_evpn_mac_is_static(mac
);
479 --mac
->sync_neigh_cnt
;
480 new_static
= zebra_evpn_mac_is_static(mac
);
481 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
483 "sync-neigh deref mac vni %u ip %pIA mac %pEA ref %d",
484 n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
485 mac
->sync_neigh_cnt
);
486 if ((old_static
!= new_static
) && send_mac_update
)
487 /* program the local mac in the kernel */
488 zebra_evpn_sync_mac_dp_install(
489 mac
, false /* set_inactive */,
490 false /* force_clear_static */, __func__
);
493 listnode_delete(mac
->neigh_list
, n
);
494 zebra_evpn_deref_ip2mac(zevpn
, mac
);
497 bool zebra_evpn_neigh_is_bgp_seq_ok(struct zebra_evpn
*zevpn
,
498 struct zebra_neigh
*n
,
499 const struct ethaddr
*macaddr
, uint32_t seq
,
505 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
506 tmp_seq
= n
->loc_seq
;
509 tmp_seq
= n
->rem_seq
;
514 /* if the neigh was never advertised to bgp we must accept
515 * whatever sequence number bgp sends
516 * XXX - check with Vivek
518 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)
519 && !zebra_evpn_neigh_is_ready_for_bgp(n
)) {
520 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
521 || IS_ZEBRA_DEBUG_VXLAN
)
523 "%s-macip accept vni %u %s mac %pEA IP %pIA lower seq %u f 0x%x",
524 sync
? "sync" : "remote", zevpn
->vni
,
525 n_type
, macaddr
, &n
->ip
,
530 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
|| IS_ZEBRA_DEBUG_VXLAN
)
532 "%s-macip ignore vni %u %s mac %pEA IP %pIA as existing has higher seq %u f 0x%x",
533 sync
? "sync" : "remote", zevpn
->vni
, n_type
,
534 macaddr
, &n
->ip
, tmp_seq
, n
->flags
);
542 * Add neighbor entry.
544 static struct zebra_neigh
*zebra_evpn_neigh_add(struct zebra_evpn
*zevpn
,
545 const struct ipaddr
*ip
,
546 const struct ethaddr
*mac
,
547 struct zebra_mac
*zmac
,
550 struct zebra_neigh tmp_n
;
551 struct zebra_neigh
*n
= NULL
;
553 memset(&tmp_n
, 0, sizeof(tmp_n
));
554 memcpy(&tmp_n
.ip
, ip
, sizeof(struct ipaddr
));
555 n
= hash_get(zevpn
->neigh_table
, &tmp_n
, zebra_evpn_neigh_alloc
);
557 n
->state
= ZEBRA_NEIGH_INACTIVE
;
559 n
->dad_ip_auto_recovery_timer
= NULL
;
561 n
->uptime
= monotime(NULL
);
564 zmac
= zebra_evpn_mac_lookup(zevpn
, mac
);
565 zebra_evpn_local_neigh_ref_mac(n
, mac
, zmac
,
566 false /* send_mac_update */);
572 * Delete neighbor entry.
574 int zebra_evpn_neigh_del(struct zebra_evpn
*zevpn
, struct zebra_neigh
*n
)
576 struct zebra_neigh
*tmp_n
;
579 listnode_delete(n
->mac
->neigh_list
, n
);
581 /* Cancel auto recovery */
582 THREAD_OFF(n
->dad_ip_auto_recovery_timer
);
584 /* Cancel proxy hold timer */
585 zebra_evpn_neigh_stop_hold_timer(n
);
587 /* Free the VNI hash entry and allocated memory. */
588 tmp_n
= hash_release(zevpn
->neigh_table
, n
);
589 XFREE(MTYPE_NEIGH
, tmp_n
);
594 void zebra_evpn_sync_neigh_del(struct zebra_neigh
*n
)
599 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
600 zlog_debug("sync-neigh del vni %u ip %pIA mac %pEA f 0x%x",
601 n
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
);
603 old_n_static
= zebra_evpn_neigh_is_static(n
);
604 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_PROXY
);
605 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
))
606 zebra_evpn_neigh_start_hold_timer(n
);
607 new_n_static
= zebra_evpn_neigh_is_static(n
);
609 if (old_n_static
!= new_n_static
)
610 zebra_evpn_sync_neigh_static_chg(
611 n
, old_n_static
, new_n_static
, false /*defer-dp*/,
612 false /*defer_mac_dp*/, __func__
);
615 struct zebra_neigh
*zebra_evpn_proc_sync_neigh_update(
616 struct zebra_evpn
*zevpn
, struct zebra_neigh
*n
, uint16_t ipa_len
,
617 const struct ipaddr
*ipaddr
, uint8_t flags
, uint32_t seq
,
618 const esi_t
*esi
, struct sync_mac_ip_ctx
*ctx
)
620 struct interface
*ifp
= NULL
;
622 struct zebra_mac
*mac
= ctx
->mac
;
624 bool old_router
= false;
625 bool old_bgp_ready
= false;
627 bool inform_dataplane
= false;
628 bool inform_bgp
= false;
631 bool set_dp_inactive
= false;
633 ifindex_t ifindex
= 0;
636 ifp
= zevpn_map_to_svi(zevpn
);
638 ifindex
= ifp
->ifindex
;
640 is_router
= !!CHECK_FLAG(flags
, ZEBRA_MACIP_TYPE_ROUTER_FLAG
);
641 old_mac_static
= zebra_evpn_mac_is_static(mac
);
644 uint32_t n_flags
= 0;
646 /* New neighbor - create */
647 SET_FLAG(n_flags
, ZEBRA_NEIGH_LOCAL
);
648 if (CHECK_FLAG(flags
, ZEBRA_MACIP_TYPE_PROXY_ADVERT
))
649 SET_FLAG(n_flags
, ZEBRA_NEIGH_ES_PEER_PROXY
);
651 SET_FLAG(n_flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
);
652 SET_FLAG(n_flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
);
654 n
= zebra_evpn_neigh_add(zevpn
, ipaddr
, &mac
->macaddr
, mac
,
656 n
->ifindex
= ifindex
;
657 ZEBRA_NEIGH_SET_ACTIVE(n
);
660 inform_dataplane
= true;
662 set_dp_inactive
= true;
665 uint32_t old_flags
= n
->flags
;
670 old_n_static
= zebra_evpn_neigh_is_static(n
);
671 old_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
672 old_router
= !!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
674 mac_change
= !!memcmp(&n
->emac
, &mac
->macaddr
, ETH_ALEN
);
676 /* deref and clear old info */
679 zebra_evpn_neigh_send_del_to_client(
680 zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
681 n
->state
, false /*force*/);
682 old_bgp_ready
= false;
684 zebra_evpn_local_neigh_deref_mac(n
,
685 false /*send_mac_update*/);
687 /* clear old fwd info */
689 n
->r_vtep_ip
.s_addr
= 0;
691 /* setup new flags */
693 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
);
694 /* retain activity flag if the neigh was
697 if (old_flags
& ZEBRA_NEIGH_LOCAL
) {
698 n
->flags
|= (old_flags
& ZEBRA_NEIGH_LOCAL_INACTIVE
);
700 inform_dataplane
= true;
701 set_dp_inactive
= true;
702 n
->flags
|= ZEBRA_NEIGH_LOCAL_INACTIVE
;
705 if (CHECK_FLAG(flags
, ZEBRA_MACIP_TYPE_PROXY_ADVERT
)) {
706 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_PROXY
);
707 /* if the neigh was peer-active previously we
708 * need to keep the flag and start the
709 * holdtimer on it. the peer-active flag is
710 * cleared on holdtimer expiry.
712 if (CHECK_FLAG(old_flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
)) {
713 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
);
714 zebra_evpn_neigh_start_hold_timer(n
);
717 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
);
718 /* stop hold timer if a peer has verified
721 zebra_evpn_neigh_stop_hold_timer(n
);
723 ZEBRA_NEIGH_SET_ACTIVE(n
);
725 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
&& (old_flags
!= n
->flags
))
727 "sync-neigh vni %u ip %pIA mac %pEA old_f 0x%x new_f 0x%x",
728 n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
729 old_flags
, n
->flags
);
731 new_n_static
= zebra_evpn_neigh_is_static(n
);
733 set_dp_inactive
= true;
734 n
->flags
|= ZEBRA_NEIGH_LOCAL_INACTIVE
;
735 inform_dataplane
= true;
736 zebra_evpn_local_neigh_ref_mac(
737 n
, &mac
->macaddr
, mac
,
738 false /*send_mac_update*/);
739 } else if (old_n_static
!= new_n_static
) {
740 inform_dataplane
= true;
741 /* if static flags have changed without a mac change
742 * we need to create the correct sync-refs against
745 zebra_evpn_sync_neigh_static_chg(
746 n
, old_n_static
, new_n_static
,
747 true /*defer_dp*/, true /*defer_mac_dp*/,
751 /* Update the forwarding info. */
752 if (n
->ifindex
!= ifindex
) {
753 n
->ifindex
= ifindex
;
754 inform_dataplane
= true;
757 n
->uptime
= monotime(NULL
);
760 /* update the neigh seq. we don't bother with the mac seq as
761 * sync_mac_update already took care of that
763 tmp_seq
= MAX(n
->loc_seq
, seq
);
764 if (tmp_seq
!= n
->loc_seq
) {
765 n
->loc_seq
= tmp_seq
;
769 /* Mark Router flag (R-bit) */
771 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
773 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
775 if (old_router
!= is_router
)
776 inform_dataplane
= true;
778 new_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
779 if (old_bgp_ready
!= new_bgp_ready
)
782 new_mac_static
= zebra_evpn_mac_is_static(mac
);
783 if ((old_mac_static
!= new_mac_static
) || ctx
->mac_dp_update_deferred
)
784 zebra_evpn_sync_mac_dp_install(mac
, ctx
->mac_inactive
,
785 false /* force_clear_static */,
788 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
790 "sync-neigh %s vni %u ip %pIA mac %pEA if %s(%d) seq %d f 0x%x%s%s",
791 created
? "created" : "updated", n
->zevpn
->vni
,
793 ifp
? ifp
->name
: "", ifindex
, n
->loc_seq
, n
->flags
,
794 inform_bgp
? " inform_bgp" : "",
795 inform_dataplane
? " inform_dp" : "");
797 if (inform_dataplane
)
798 zebra_evpn_sync_neigh_dp_install(n
, set_dp_inactive
,
799 false /* force_clear_static */,
803 zebra_evpn_neigh_send_add_del_to_client(n
, old_bgp_ready
,
810 * Uninstall remote neighbor from the kernel.
812 static int zebra_evpn_neigh_uninstall(struct zebra_evpn
*zevpn
,
813 struct zebra_neigh
*n
)
815 struct interface
*vlan_if
;
817 if (!(n
->flags
& ZEBRA_NEIGH_REMOTE
))
820 vlan_if
= zevpn_map_to_svi(zevpn
);
824 ZEBRA_NEIGH_SET_INACTIVE(n
);
827 dplane_rem_neigh_delete(vlan_if
, &n
->ip
);
833 * Free neighbor hash entry (callback)
835 static void zebra_evpn_neigh_del_hash_entry(struct hash_bucket
*bucket
,
838 struct neigh_walk_ctx
*wctx
= arg
;
839 struct zebra_neigh
*n
= bucket
->data
;
841 if (((wctx
->flags
& DEL_LOCAL_NEIGH
) && (n
->flags
& ZEBRA_NEIGH_LOCAL
))
842 || ((wctx
->flags
& DEL_REMOTE_NEIGH
)
843 && (n
->flags
& ZEBRA_NEIGH_REMOTE
))
844 || ((wctx
->flags
& DEL_REMOTE_NEIGH_FROM_VTEP
)
845 && (n
->flags
& ZEBRA_NEIGH_REMOTE
)
846 && IPV4_ADDR_SAME(&n
->r_vtep_ip
, &wctx
->r_vtep_ip
))) {
847 if (wctx
->upd_client
&& (n
->flags
& ZEBRA_NEIGH_LOCAL
))
848 zebra_evpn_neigh_send_del_to_client(
849 wctx
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
850 n
->state
, false /*force*/);
852 if (wctx
->uninstall
) {
853 if (zebra_evpn_neigh_is_static(n
))
854 zebra_evpn_sync_neigh_dp_install(
855 n
, false /* set_inactive */,
856 true /* force_clear_static */,
858 if ((n
->flags
& ZEBRA_NEIGH_REMOTE
))
859 zebra_evpn_neigh_uninstall(wctx
->zevpn
, n
);
862 zebra_evpn_neigh_del(wctx
->zevpn
, n
);
869 * Delete all neighbor entries for this EVPN.
871 void zebra_evpn_neigh_del_all(struct zebra_evpn
*zevpn
, int uninstall
,
872 int upd_client
, uint32_t flags
)
874 struct neigh_walk_ctx wctx
;
876 if (!zevpn
->neigh_table
)
879 memset(&wctx
, 0, sizeof(wctx
));
881 wctx
.uninstall
= uninstall
;
882 wctx
.upd_client
= upd_client
;
885 hash_iterate(zevpn
->neigh_table
, zebra_evpn_neigh_del_hash_entry
,
890 * Look up neighbor hash entry.
892 struct zebra_neigh
*zebra_evpn_neigh_lookup(struct zebra_evpn
*zevpn
,
893 const struct ipaddr
*ip
)
895 struct zebra_neigh tmp
;
896 struct zebra_neigh
*n
;
898 memset(&tmp
, 0, sizeof(tmp
));
899 memcpy(&tmp
.ip
, ip
, sizeof(struct ipaddr
));
900 n
= hash_lookup(zevpn
->neigh_table
, &tmp
);
906 * Process all neighbors associated with a MAC upon the MAC being learnt
907 * locally or undergoing any other change (such as sequence number).
909 void zebra_evpn_process_neigh_on_local_mac_change(struct zebra_evpn
*zevpn
,
910 struct zebra_mac
*zmac
,
914 struct zebra_neigh
*n
= NULL
;
915 struct listnode
*node
= NULL
;
916 struct zebra_vrf
*zvrf
= NULL
;
918 zvrf
= zevpn
->vxlan_if
->vrf
->info
;
920 if (IS_ZEBRA_DEBUG_VXLAN
)
921 zlog_debug("Processing neighbors on local MAC %pEA %s, VNI %u",
922 &zmac
->macaddr
, seq_change
? "CHANGE" : "ADD",
925 /* Walk all neighbors and mark any inactive local neighbors as
926 * active and/or update sequence number upon a move, and inform BGP.
927 * The action for remote neighbors is TBD.
928 * NOTE: We can't simply uninstall remote neighbors as the kernel may
929 * accidentally end up deleting a just-learnt local neighbor.
931 for (ALL_LIST_ELEMENTS_RO(zmac
->neigh_list
, node
, n
)) {
932 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
933 if (IS_ZEBRA_NEIGH_INACTIVE(n
) || seq_change
935 ZEBRA_NEIGH_SET_ACTIVE(n
);
936 n
->loc_seq
= zmac
->loc_seq
;
937 if (!(zebra_evpn_do_dup_addr_detect(zvrf
)
939 && !!CHECK_FLAG(n
->flags
,
940 ZEBRA_NEIGH_DUPLICATE
)))
941 zebra_evpn_neigh_send_add_to_client(
942 zevpn
->vni
, &n
->ip
, &n
->emac
,
943 n
->mac
, n
->flags
, n
->loc_seq
);
950 * Process all neighbors associated with a local MAC upon the MAC being
953 void zebra_evpn_process_neigh_on_local_mac_del(struct zebra_evpn
*zevpn
,
954 struct zebra_mac
*zmac
)
956 struct zebra_neigh
*n
= NULL
;
957 struct listnode
*node
= NULL
;
959 if (IS_ZEBRA_DEBUG_VXLAN
)
960 zlog_debug("Processing neighbors on local MAC %pEA DEL, VNI %u",
961 &zmac
->macaddr
, zevpn
->vni
);
963 /* Walk all local neighbors and mark as inactive and inform
965 * TBD: There is currently no handling for remote neighbors. We
966 * don't expect them to exist, if they do, do we install the MAC
967 * as a remote MAC and the neighbor as remote?
969 for (ALL_LIST_ELEMENTS_RO(zmac
->neigh_list
, node
, n
)) {
970 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
971 if (IS_ZEBRA_NEIGH_ACTIVE(n
)) {
972 ZEBRA_NEIGH_SET_INACTIVE(n
);
974 zebra_evpn_neigh_send_del_to_client(
975 zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
976 ZEBRA_NEIGH_ACTIVE
, false /*force*/);
983 * Process all neighbors associated with a MAC upon the MAC being remotely
986 void zebra_evpn_process_neigh_on_remote_mac_add(struct zebra_evpn
*zevpn
,
987 struct zebra_mac
*zmac
)
989 struct zebra_neigh
*n
= NULL
;
990 struct listnode
*node
= NULL
;
992 if (IS_ZEBRA_DEBUG_VXLAN
)
993 zlog_debug("Processing neighbors on remote MAC %pEA ADD, VNI %u",
994 &zmac
->macaddr
, zevpn
->vni
);
996 /* Walk all local neighbors and mark as inactive and inform
999 for (ALL_LIST_ELEMENTS_RO(zmac
->neigh_list
, node
, n
)) {
1000 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
1001 if (IS_ZEBRA_NEIGH_ACTIVE(n
)) {
1002 ZEBRA_NEIGH_SET_INACTIVE(n
);
1004 zebra_evpn_neigh_send_del_to_client(
1005 zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
1006 ZEBRA_NEIGH_ACTIVE
, false /* force */);
1013 * Process all neighbors associated with a remote MAC upon the MAC being
1016 void zebra_evpn_process_neigh_on_remote_mac_del(struct zebra_evpn
*zevpn
,
1017 struct zebra_mac
*zmac
)
1019 /* NOTE: Currently a NO-OP. */
1022 static inline void zebra_evpn_local_neigh_update_log(
1023 const char *pfx
, struct zebra_neigh
*n
, bool is_router
,
1024 bool local_inactive
, bool old_bgp_ready
, bool new_bgp_ready
,
1025 bool inform_dataplane
, bool inform_bgp
, const char *sfx
)
1027 if (!IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
1030 zlog_debug("%s neigh vni %u ip %pIA mac %pEA f 0x%x%s%s%s%s%s%s %s", pfx
,
1031 n
->zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
1032 is_router
? " router" : "",
1033 local_inactive
? " local-inactive" : "",
1034 old_bgp_ready
? " old_bgp_ready" : "",
1035 new_bgp_ready
? " new_bgp_ready" : "",
1036 inform_dataplane
? " inform_dp" : "",
1037 inform_bgp
? " inform_bgp" : "", sfx
);
1040 /* As part Duplicate Address Detection (DAD) for IP mobility
1041 * MAC binding changes, ensure to inherit duplicate flag
1044 static int zebra_evpn_ip_inherit_dad_from_mac(struct zebra_vrf
*zvrf
,
1045 struct zebra_mac
*old_zmac
,
1046 struct zebra_mac
*new_zmac
,
1047 struct zebra_neigh
*nbr
)
1049 bool is_old_mac_dup
= false;
1050 bool is_new_mac_dup
= false;
1052 if (!zebra_evpn_do_dup_addr_detect(zvrf
))
1054 /* Check old or new MAC is detected as duplicate
1055 * mark this neigh as duplicate
1059 CHECK_FLAG(old_zmac
->flags
, ZEBRA_MAC_DUPLICATE
);
1062 CHECK_FLAG(new_zmac
->flags
, ZEBRA_MAC_DUPLICATE
);
1063 /* Old and/or new MAC can be in duplicate state,
1064 * based on that IP/Neigh Inherits the flag.
1065 * If New MAC is marked duplicate, inherit to the IP.
1066 * If old MAC is duplicate but new MAC is not, clear
1067 * duplicate flag for IP and reset detection params
1068 * and let IP DAD retrigger.
1070 if (is_new_mac_dup
&& !CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
)) {
1071 SET_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
);
1072 /* Capture Duplicate detection time */
1073 nbr
->dad_dup_detect_time
= monotime(NULL
);
1074 /* Mark neigh inactive */
1075 ZEBRA_NEIGH_SET_INACTIVE(nbr
);
1078 } else if (is_old_mac_dup
&& !is_new_mac_dup
) {
1079 UNSET_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
);
1081 nbr
->detect_start_time
.tv_sec
= 0;
1082 nbr
->detect_start_time
.tv_usec
= 0;
1087 static void zebra_evpn_dad_ip_auto_recovery_exp(struct thread
*t
)
1089 struct zebra_vrf
*zvrf
= NULL
;
1090 struct zebra_neigh
*nbr
= NULL
;
1091 struct zebra_evpn
*zevpn
= NULL
;
1093 nbr
= THREAD_ARG(t
);
1095 /* since this is asynchronous we need sanity checks*/
1096 zvrf
= vrf_info_lookup(nbr
->zevpn
->vrf_id
);
1100 zevpn
= zebra_evpn_lookup(nbr
->zevpn
->vni
);
1104 nbr
= zebra_evpn_neigh_lookup(zevpn
, &nbr
->ip
);
1108 if (IS_ZEBRA_DEBUG_VXLAN
)
1110 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x learn count %u vni %u auto recovery expired",
1111 __func__
, &nbr
->emac
, &nbr
->ip
, nbr
->flags
,
1112 nbr
->dad_count
, zevpn
->vni
);
1114 UNSET_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
);
1116 nbr
->detect_start_time
.tv_sec
= 0;
1117 nbr
->detect_start_time
.tv_usec
= 0;
1118 nbr
->dad_dup_detect_time
= 0;
1119 nbr
->dad_ip_auto_recovery_timer
= NULL
;
1120 ZEBRA_NEIGH_SET_ACTIVE(nbr
);
1123 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_LOCAL
)) {
1124 zebra_evpn_neigh_send_add_to_client(zevpn
->vni
, &nbr
->ip
,
1125 &nbr
->emac
, nbr
->mac
,
1126 nbr
->flags
, nbr
->loc_seq
);
1127 } else if (!!CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1128 zebra_evpn_rem_neigh_install(zevpn
, nbr
, false /*was_static*/);
1132 static void zebra_evpn_dup_addr_detect_for_neigh(
1133 struct zebra_vrf
*zvrf
, struct zebra_neigh
*nbr
, struct in_addr vtep_ip
,
1134 bool do_dad
, bool *is_dup_detect
, bool is_local
)
1137 struct timeval elapsed
= {0, 0};
1138 bool reset_params
= false;
1140 if (!zebra_evpn_do_dup_addr_detect(zvrf
))
1143 /* IP is detected as duplicate or inherit dup
1144 * state, hold on to install as remote entry
1145 * only if freeze is enabled.
1147 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
)) {
1148 if (IS_ZEBRA_DEBUG_VXLAN
)
1150 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x skip installing, learn count %u recover time %u",
1151 __func__
, &nbr
->emac
, &nbr
->ip
,
1152 nbr
->flags
, nbr
->dad_count
,
1153 zvrf
->dad_freeze_time
);
1155 if (zvrf
->dad_freeze
)
1156 *is_dup_detect
= true;
1158 /* warn-only action, neigh will be installed.
1159 * freeze action, it wil not be installed.
1167 /* Check if detection time (M-secs) expired.
1168 * Reset learn count and detection start time.
1169 * During remote mac add, count should already be 1
1170 * via local learning.
1172 monotime_since(&nbr
->detect_start_time
, &elapsed
);
1173 reset_params
= (elapsed
.tv_sec
> zvrf
->dad_time
);
1175 if (is_local
&& !reset_params
) {
1176 /* RFC-7432: A PE/VTEP that detects a MAC mobility
1177 * event via LOCAL learning starts an M-second timer.
1179 * NOTE: This is the START of the probe with count is
1180 * 0 during LOCAL learn event.
1182 reset_params
= !nbr
->dad_count
;
1186 if (IS_ZEBRA_DEBUG_VXLAN
)
1188 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x detection time passed, reset learn count %u",
1189 __func__
, &nbr
->emac
, &nbr
->ip
,
1190 nbr
->flags
, nbr
->dad_count
);
1191 /* Reset learn count but do not start detection
1192 * during REMOTE learn event.
1195 /* Start dup. addr detection (DAD) start time,
1196 * ONLY during LOCAL learn.
1199 monotime(&nbr
->detect_start_time
);
1201 } else if (!is_local
) {
1202 /* For REMOTE IP/Neigh, increment detection count
1203 * ONLY while in probe window, once window passed,
1204 * next local learn event should trigger DAD.
1209 /* For LOCAL IP/Neigh learn event, once count is reset above via either
1210 * initial/start detection time or passed the probe time, the count
1211 * needs to be incremented.
1216 if (nbr
->dad_count
>= zvrf
->dad_max_moves
) {
1218 EC_ZEBRA_DUP_IP_DETECTED
,
1219 "VNI %u: MAC %pEA IP %pIA detected as duplicate during %s VTEP %pI4",
1220 nbr
->zevpn
->vni
, &nbr
->emac
, &nbr
->ip
,
1221 is_local
? "local update, last" : "remote update, from",
1224 SET_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
);
1226 /* Capture Duplicate detection time */
1227 nbr
->dad_dup_detect_time
= monotime(NULL
);
1229 /* Start auto recovery timer for this IP */
1230 THREAD_OFF(nbr
->dad_ip_auto_recovery_timer
);
1231 if (zvrf
->dad_freeze
&& zvrf
->dad_freeze_time
) {
1232 if (IS_ZEBRA_DEBUG_VXLAN
)
1234 "%s: duplicate addr MAC %pEA IP %pIA flags 0x%x auto recovery time %u start",
1235 __func__
, &nbr
->emac
, &nbr
->ip
,
1236 nbr
->flags
, zvrf
->dad_freeze_time
);
1238 thread_add_timer(zrouter
.master
,
1239 zebra_evpn_dad_ip_auto_recovery_exp
,
1240 nbr
, zvrf
->dad_freeze_time
,
1241 &nbr
->dad_ip_auto_recovery_timer
);
1243 if (zvrf
->dad_freeze
)
1244 *is_dup_detect
= true;
1248 int zebra_evpn_local_neigh_update(struct zebra_evpn
*zevpn
,
1249 struct interface
*ifp
,
1250 const struct ipaddr
*ip
,
1251 const struct ethaddr
*macaddr
, bool is_router
,
1252 bool local_inactive
, bool dp_static
)
1254 struct zebra_vrf
*zvrf
;
1255 struct zebra_neigh
*n
= NULL
;
1256 struct zebra_mac
*zmac
= NULL
, *old_zmac
= NULL
;
1257 uint32_t old_mac_seq
= 0, mac_new_seq
= 0;
1258 bool upd_mac_seq
= false;
1259 bool neigh_mac_change
= false;
1260 bool neigh_on_hold
= false;
1261 bool neigh_was_remote
= false;
1262 bool do_dad
= false;
1263 struct in_addr vtep_ip
= {.s_addr
= 0};
1264 bool inform_dataplane
= false;
1265 bool created
= false;
1266 bool new_static
= false;
1267 bool old_bgp_ready
= false;
1270 /* Check if the MAC exists. */
1271 zmac
= zebra_evpn_mac_lookup(zevpn
, macaddr
);
1273 /* create a dummy MAC if the MAC is not already present */
1274 if (IS_ZEBRA_DEBUG_VXLAN
)
1275 zlog_debug("AUTO MAC %pEA created for neigh %pIA on VNI %u",
1276 macaddr
, ip
, zevpn
->vni
);
1278 zmac
= zebra_evpn_mac_add(zevpn
, macaddr
);
1279 zebra_evpn_mac_clear_fwd_info(zmac
);
1280 memset(&zmac
->flags
, 0, sizeof(uint32_t));
1281 SET_FLAG(zmac
->flags
, ZEBRA_MAC_AUTO
);
1283 if (CHECK_FLAG(zmac
->flags
, ZEBRA_MAC_REMOTE
)) {
1285 * We don't change the MAC to local upon a neighbor
1286 * learn event, we wait for the explicit local MAC
1287 * learn. However, we have to compute its sequence
1288 * number in preparation for when it actually turns
1295 zvrf
= zevpn
->vxlan_if
->vrf
->info
;
1297 if (IS_ZEBRA_DEBUG_VXLAN
)
1298 zlog_debug(" Unable to find vrf for: %d",
1299 zevpn
->vxlan_if
->vrf
->vrf_id
);
1303 /* Check if the neighbor exists. */
1304 n
= zebra_evpn_neigh_lookup(zevpn
, ip
);
1306 /* New neighbor - create */
1307 n
= zebra_evpn_neigh_add(zevpn
, ip
, macaddr
, zmac
, 0);
1309 /* Set "local" forwarding info. */
1310 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
);
1311 n
->ifindex
= ifp
->ifindex
;
1314 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
1317 bool old_local_inactive
;
1319 old_local_inactive
= !!CHECK_FLAG(
1320 n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
);
1322 old_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
1324 /* Note any changes and see if of interest to BGP. */
1325 mac_different
= !!memcmp(&n
->emac
, macaddr
, ETH_ALEN
);
1327 !!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
1328 new_static
= zebra_evpn_neigh_is_static(n
);
1329 if (!mac_different
&& is_router
== cur_is_router
1330 && old_local_inactive
== local_inactive
1331 && dp_static
!= new_static
) {
1332 if (IS_ZEBRA_DEBUG_VXLAN
)
1334 " Ignoring entry mac is the same and is_router == cur_is_router");
1335 n
->ifindex
= ifp
->ifindex
;
1340 if (!mac_different
) {
1341 /* XXX - cleanup this code duplication */
1342 bool is_neigh_freezed
= false;
1344 /* Only the router flag has changed. */
1347 ZEBRA_NEIGH_ROUTER_FLAG
);
1349 UNSET_FLAG(n
->flags
,
1350 ZEBRA_NEIGH_ROUTER_FLAG
);
1354 ZEBRA_NEIGH_LOCAL_INACTIVE
);
1356 UNSET_FLAG(n
->flags
,
1357 ZEBRA_NEIGH_LOCAL_INACTIVE
);
1359 zebra_evpn_neigh_is_ready_for_bgp(n
);
1361 if (dp_static
!= new_static
)
1362 inform_dataplane
= true;
1364 /* Neigh is in freeze state and freeze action
1365 * is enabled, do not send update to client.
1368 (zebra_evpn_do_dup_addr_detect(zvrf
)
1370 && CHECK_FLAG(n
->flags
,
1371 ZEBRA_NEIGH_DUPLICATE
));
1373 zebra_evpn_local_neigh_update_log(
1374 "local", n
, is_router
, local_inactive
,
1375 old_bgp_ready
, new_bgp_ready
, false,
1376 false, "flag-update");
1378 if (inform_dataplane
)
1379 zebra_evpn_sync_neigh_dp_install(
1380 n
, false /* set_inactive */,
1381 false /* force_clear_static */,
1384 /* if the neigh can no longer be advertised
1385 * remove it from bgp
1387 if (!is_neigh_freezed
) {
1388 zebra_evpn_neigh_send_add_del_to_client(
1392 if (IS_ZEBRA_DEBUG_VXLAN
1393 && IS_ZEBRA_NEIGH_ACTIVE(n
))
1395 " Neighbor active and frozen");
1400 /* The MAC has changed, need to issue a delete
1401 * first as this means a different MACIP route.
1402 * Also, need to do some unlinking/relinking.
1403 * We also need to update the MAC's sequence number
1404 * in different situations.
1406 if (old_bgp_ready
) {
1407 zebra_evpn_neigh_send_del_to_client(
1408 zevpn
->vni
, &n
->ip
, &n
->emac
, n
->flags
,
1409 n
->state
, false /*force*/);
1410 old_bgp_ready
= false;
1413 old_mac_seq
= CHECK_FLAG(old_zmac
->flags
,
1416 : old_zmac
->loc_seq
;
1417 neigh_mac_change
= upd_mac_seq
= true;
1418 zebra_evpn_local_neigh_deref_mac(
1419 n
, true /* send_mac_update */);
1422 /* if mac changes abandon peer flags and tell
1423 * dataplane to clear the static flag
1425 if (zebra_evpn_neigh_clear_sync_info(n
))
1426 inform_dataplane
= true;
1427 /* Update the forwarding info. */
1428 n
->ifindex
= ifp
->ifindex
;
1430 /* Link to new MAC */
1431 zebra_evpn_local_neigh_ref_mac(
1432 n
, macaddr
, zmac
, true /* send_mac_update */);
1433 } else if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1435 * Neighbor has moved from remote to local. Its
1436 * MAC could have also changed as part of the move.
1438 if (memcmp(n
->emac
.octet
, macaddr
->octet
, ETH_ALEN
)
1443 CHECK_FLAG(old_zmac
->flags
,
1446 : old_zmac
->loc_seq
;
1447 neigh_mac_change
= upd_mac_seq
= true;
1448 zebra_evpn_local_neigh_deref_mac(
1449 n
, true /* send_update */);
1452 /* Link to new MAC */
1453 zebra_evpn_local_neigh_ref_mac(
1454 n
, macaddr
, zmac
, true /*send_update*/);
1456 /* Based on Mobility event Scenario-B from the
1457 * draft, neigh's previous state was remote treat this
1460 neigh_was_remote
= true;
1461 vtep_ip
= n
->r_vtep_ip
;
1462 /* Mark appropriately */
1463 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
);
1464 n
->r_vtep_ip
.s_addr
= INADDR_ANY
;
1465 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
);
1466 n
->ifindex
= ifp
->ifindex
;
1470 /* If MAC was previously remote, or the neighbor had a different
1471 * MAC earlier, recompute the sequence number.
1474 uint32_t seq1
, seq2
;
1476 seq1
= CHECK_FLAG(zmac
->flags
, ZEBRA_MAC_REMOTE
)
1479 seq2
= neigh_mac_change
? old_mac_seq
+ 1 : 0;
1480 mac_new_seq
= zmac
->loc_seq
< MAX(seq1
, seq2
) ? MAX(seq1
, seq2
)
1485 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
);
1487 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
);
1489 /* Mark Router flag (R-bit) */
1491 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
1493 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
1495 /* if zebra and dataplane don't agree this is a sync entry
1496 * re-install in the dataplane */
1497 new_static
= zebra_evpn_neigh_is_static(n
);
1498 if (dp_static
!= new_static
)
1499 inform_dataplane
= true;
1501 /* Check old and/or new MAC detected as duplicate mark
1502 * the neigh as duplicate
1504 if (zebra_evpn_ip_inherit_dad_from_mac(zvrf
, old_zmac
, zmac
, n
)) {
1506 EC_ZEBRA_DUP_IP_INHERIT_DETECTED
,
1507 "VNI %u: MAC %pEA IP %pIA detected as duplicate during local update, inherit duplicate from MAC",
1508 zevpn
->vni
, macaddr
, &n
->ip
);
1511 /* For IP Duplicate Address Detection (DAD) is trigger,
1512 * when the event is extended mobility based on scenario-B
1513 * from the draft, IP/Neigh's MAC binding changed and
1514 * neigh's previous state was remote.
1516 if (neigh_mac_change
&& neigh_was_remote
)
1519 zebra_evpn_dup_addr_detect_for_neigh(zvrf
, n
, vtep_ip
, do_dad
,
1520 &neigh_on_hold
, true);
1522 if (inform_dataplane
)
1523 zebra_evpn_sync_neigh_dp_install(n
, false /* set_inactive */,
1524 false /* force_clear_static */,
1527 /* Before we program this in BGP, we need to check if MAC is locally
1528 * learnt. If not, force neighbor to be inactive and reset its seq.
1530 if (!CHECK_FLAG(zmac
->flags
, ZEBRA_MAC_LOCAL
)) {
1531 zebra_evpn_local_neigh_update_log(
1532 "local", n
, is_router
, local_inactive
, false, false,
1533 inform_dataplane
, false, "auto-mac");
1534 ZEBRA_NEIGH_SET_INACTIVE(n
);
1536 zmac
->loc_seq
= mac_new_seq
;
1540 zebra_evpn_local_neigh_update_log("local", n
, is_router
, local_inactive
,
1541 false, false, inform_dataplane
, true,
1542 created
? "created" : "updated");
1544 /* If the MAC's sequence number has changed, inform the MAC and all
1545 * neighbors associated with the MAC to BGP, else just inform this
1548 if (upd_mac_seq
&& zmac
->loc_seq
!= mac_new_seq
) {
1549 if (IS_ZEBRA_DEBUG_VXLAN
)
1551 "Seq changed for MAC %pEA VNI %u - old %u new %u",
1552 macaddr
, zevpn
->vni
,
1553 zmac
->loc_seq
, mac_new_seq
);
1554 zmac
->loc_seq
= mac_new_seq
;
1555 if (zebra_evpn_mac_send_add_to_client(zevpn
->vni
, macaddr
,
1557 zmac
->loc_seq
, zmac
->es
))
1559 zebra_evpn_process_neigh_on_local_mac_change(zevpn
, zmac
, 1,
1564 n
->loc_seq
= zmac
->loc_seq
;
1566 if (!neigh_on_hold
) {
1567 ZEBRA_NEIGH_SET_ACTIVE(n
);
1568 new_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
1569 zebra_evpn_neigh_send_add_del_to_client(n
, old_bgp_ready
,
1572 if (IS_ZEBRA_DEBUG_VXLAN
)
1573 zlog_debug(" Neighbor on hold not sending");
1578 int zebra_evpn_remote_neigh_update(struct zebra_evpn
*zevpn
,
1579 struct interface
*ifp
,
1580 const struct ipaddr
*ip
,
1581 const struct ethaddr
*macaddr
,
1584 struct zebra_neigh
*n
= NULL
;
1585 struct zebra_mac
*zmac
= NULL
;
1587 /* If the neighbor is unknown, there is no further action. */
1588 n
= zebra_evpn_neigh_lookup(zevpn
, ip
);
1592 /* If a remote entry, see if it needs to be refreshed */
1593 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1595 if (state
& NUD_STALE
)
1596 zebra_evpn_rem_neigh_install(zevpn
, n
,
1597 false /*was_static*/);
1600 /* We got a "remote" neighbor notification for an entry
1601 * we think is local. This can happen in a multihoming
1602 * scenario - but only if the MAC is already "remote".
1603 * Just mark our entry as "remote".
1605 zmac
= zebra_evpn_mac_lookup(zevpn
, macaddr
);
1606 if (!zmac
|| !CHECK_FLAG(zmac
->flags
, ZEBRA_MAC_REMOTE
)) {
1608 "Ignore remote neigh %pIA (MAC %pEA) on L2-VNI %u - MAC unknown or local",
1609 &n
->ip
, macaddr
, zevpn
->vni
);
1613 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ALL_LOCAL_FLAGS
);
1614 SET_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
);
1615 ZEBRA_NEIGH_SET_ACTIVE(n
);
1616 n
->r_vtep_ip
= zmac
->fwd_info
.r_vtep_ip
;
1622 /* Notify Neighbor entries to the Client, skips the GW entry */
1624 zebra_evpn_send_neigh_hash_entry_to_client(struct hash_bucket
*bucket
,
1627 struct mac_walk_ctx
*wctx
= arg
;
1628 struct zebra_neigh
*zn
= bucket
->data
;
1629 struct zebra_mac
*zmac
= NULL
;
1631 if (CHECK_FLAG(zn
->flags
, ZEBRA_NEIGH_DEF_GW
))
1634 if (CHECK_FLAG(zn
->flags
, ZEBRA_NEIGH_LOCAL
)
1635 && IS_ZEBRA_NEIGH_ACTIVE(zn
)) {
1636 zmac
= zebra_evpn_mac_lookup(wctx
->zevpn
, &zn
->emac
);
1640 zebra_evpn_neigh_send_add_to_client(wctx
->zevpn
->vni
, &zn
->ip
,
1642 zn
->flags
, zn
->loc_seq
);
1646 /* Iterator of a specific EVPN */
1647 void zebra_evpn_send_neigh_to_client(struct zebra_evpn
*zevpn
)
1649 struct neigh_walk_ctx wctx
;
1651 memset(&wctx
, 0, sizeof(wctx
));
1654 hash_iterate(zevpn
->neigh_table
,
1655 zebra_evpn_send_neigh_hash_entry_to_client
, &wctx
);
1658 void zebra_evpn_clear_dup_neigh_hash(struct hash_bucket
*bucket
, void *ctxt
)
1660 struct neigh_walk_ctx
*wctx
= ctxt
;
1661 struct zebra_neigh
*nbr
;
1662 struct zebra_evpn
*zevpn
;
1663 char buf
[INET6_ADDRSTRLEN
];
1665 nbr
= (struct zebra_neigh
*)bucket
->data
;
1669 zevpn
= wctx
->zevpn
;
1671 if (!CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
))
1674 if (IS_ZEBRA_DEBUG_VXLAN
) {
1675 ipaddr2str(&nbr
->ip
, buf
, sizeof(buf
));
1676 zlog_debug("%s: clear neigh %s dup state, flags 0x%x seq %u",
1677 __func__
, buf
, nbr
->flags
, nbr
->loc_seq
);
1680 UNSET_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
);
1682 nbr
->detect_start_time
.tv_sec
= 0;
1683 nbr
->detect_start_time
.tv_usec
= 0;
1684 nbr
->dad_dup_detect_time
= 0;
1685 THREAD_OFF(nbr
->dad_ip_auto_recovery_timer
);
1687 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_LOCAL
)) {
1688 zebra_evpn_neigh_send_add_to_client(zevpn
->vni
, &nbr
->ip
,
1689 &nbr
->emac
, nbr
->mac
,
1690 nbr
->flags
, nbr
->loc_seq
);
1691 } else if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1692 zebra_evpn_rem_neigh_install(zevpn
, nbr
, false /*was_static*/);
1697 * Print a specific neighbor entry.
1699 void zebra_evpn_print_neigh(struct zebra_neigh
*n
, void *ctxt
,
1703 char buf1
[ETHER_ADDR_STRLEN
];
1704 char buf2
[INET6_ADDRSTRLEN
];
1705 const char *type_str
;
1706 const char *state_str
;
1707 bool flags_present
= false;
1708 struct zebra_vrf
*zvrf
= NULL
;
1709 struct timeval detect_start_time
= {0, 0};
1710 char timebuf
[MONOTIME_STRLEN
];
1711 char thread_buf
[THREAD_TIMER_STRLEN
];
1713 char up_str
[MONOTIME_STRLEN
];
1715 zvrf
= zebra_vrf_get_evpn();
1716 uptime
= monotime(NULL
);
1717 uptime
-= n
->uptime
;
1719 frrtime_to_interval(uptime
, up_str
, sizeof(up_str
));
1721 ipaddr2str(&n
->ip
, buf2
, sizeof(buf2
));
1722 prefix_mac2str(&n
->emac
, buf1
, sizeof(buf1
));
1723 type_str
= CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
) ? "local" : "remote";
1724 state_str
= IS_ZEBRA_NEIGH_ACTIVE(n
) ? "active" : "inactive";
1725 vty
= (struct vty
*)ctxt
;
1727 bool sync_info
= false;
1729 vty_out(vty
, "IP: %s\n",
1730 ipaddr2str(&n
->ip
, buf2
, sizeof(buf2
)));
1731 vty_out(vty
, " Type: %s\n", type_str
);
1732 vty_out(vty
, " State: %s\n", state_str
);
1733 vty_out(vty
, " Uptime: %s\n", up_str
);
1734 vty_out(vty
, " MAC: %s\n",
1735 prefix_mac2str(&n
->emac
, buf1
, sizeof(buf1
)));
1736 vty_out(vty
, " Sync-info:");
1737 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
)) {
1738 vty_out(vty
, " local-inactive");
1741 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_PROXY
)) {
1742 vty_out(vty
, " peer-proxy");
1745 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
)) {
1746 vty_out(vty
, " peer-active");
1749 if (n
->hold_timer
) {
1750 vty_out(vty
, " (ht: %s)",
1751 thread_timer_to_hhmmss(thread_buf
,
1760 json_object_string_add(json
, "uptime", up_str
);
1761 json_object_string_add(json
, "ip", buf2
);
1762 json_object_string_add(json
, "type", type_str
);
1763 json_object_string_add(json
, "state", state_str
);
1764 json_object_string_add(json
, "mac", buf1
);
1765 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
))
1766 json_object_boolean_true_add(json
, "localInactive");
1767 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_PROXY
))
1768 json_object_boolean_true_add(json
, "peerProxy");
1769 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ES_PEER_ACTIVE
))
1770 json_object_boolean_true_add(json
, "peerActive");
1772 json_object_string_add(
1773 json
, "peerActiveHold",
1774 thread_timer_to_hhmmss(thread_buf
,
1778 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1781 json_object_string_add(json
, "remoteEs",
1782 n
->mac
->es
->esi_str
);
1784 vty_out(vty
, " Remote ES: %s\n",
1785 n
->mac
->es
->esi_str
);
1788 json_object_string_addf(json
, "remoteVtep",
1789 "%pI4", &n
->r_vtep_ip
);
1791 vty_out(vty
, " Remote VTEP: %pI4\n",
1795 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DEF_GW
)) {
1797 vty_out(vty
, " Flags: Default-gateway");
1798 flags_present
= true;
1800 json_object_boolean_true_add(json
, "defaultGateway");
1802 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
)) {
1805 flags_present
? " ,Router" : " Flags: Router");
1806 flags_present
= true;
1812 vty_out(vty
, " Local Seq: %u Remote Seq: %u\n", n
->loc_seq
,
1815 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
)) {
1816 vty_out(vty
, " Duplicate, detected at %s",
1817 time_to_string(n
->dad_dup_detect_time
,
1819 } else if (n
->dad_count
) {
1820 monotime_since(&n
->detect_start_time
,
1821 &detect_start_time
);
1822 if (detect_start_time
.tv_sec
<= zvrf
->dad_time
) {
1823 time_to_string(n
->detect_start_time
.tv_sec
,
1826 " Duplicate detection started at %s, detection count %u\n",
1827 timebuf
, n
->dad_count
);
1831 json_object_int_add(json
, "localSequence", n
->loc_seq
);
1832 json_object_int_add(json
, "remoteSequence", n
->rem_seq
);
1833 json_object_int_add(json
, "detectionCount", n
->dad_count
);
1834 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
))
1835 json_object_boolean_true_add(json
, "isDuplicate");
1837 json_object_boolean_false_add(json
, "isDuplicate");
1841 void zebra_evpn_print_neigh_hdr(struct vty
*vty
, struct neigh_walk_ctx
*wctx
)
1843 vty_out(vty
, "Flags: I=local-inactive, P=peer-active, X=peer-proxy\n");
1844 vty_out(vty
, "%*s %-6s %-5s %-8s %-17s %-30s %s\n", -wctx
->addr_width
,
1845 "Neighbor", "Type", "Flags", "State", "MAC", "Remote ES/VTEP",
1849 static char *zebra_evpn_print_neigh_flags(struct zebra_neigh
*n
,
1851 uint32_t flags_buf_sz
)
1853 snprintf(flags_buf
, flags_buf_sz
, "%s%s%s",
1854 (n
->flags
& ZEBRA_NEIGH_ES_PEER_ACTIVE
) ?
1856 (n
->flags
& ZEBRA_NEIGH_ES_PEER_PROXY
) ?
1858 (n
->flags
& ZEBRA_NEIGH_LOCAL_INACTIVE
) ?
1865 * Print neighbor hash entry - called for display of all neighbors.
1867 void zebra_evpn_print_neigh_hash(struct hash_bucket
*bucket
, void *ctxt
)
1870 json_object
*json_evpn
= NULL
, *json_row
= NULL
;
1871 struct zebra_neigh
*n
;
1872 char buf1
[ETHER_ADDR_STRLEN
];
1873 char buf2
[INET6_ADDRSTRLEN
];
1874 char addr_buf
[PREFIX_STRLEN
];
1875 struct neigh_walk_ctx
*wctx
= ctxt
;
1876 const char *state_str
;
1880 json_evpn
= wctx
->json
;
1881 n
= (struct zebra_neigh
*)bucket
->data
;
1884 json_row
= json_object_new_object();
1886 prefix_mac2str(&n
->emac
, buf1
, sizeof(buf1
));
1887 ipaddr2str(&n
->ip
, buf2
, sizeof(buf2
));
1888 state_str
= IS_ZEBRA_NEIGH_ACTIVE(n
) ? "active" : "inactive";
1889 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
1890 if (wctx
->flags
& SHOW_REMOTE_NEIGH_FROM_VTEP
)
1893 if (json_evpn
== NULL
) {
1894 vty_out(vty
, "%*s %-6s %-5s %-8s %-17s %-30s %u/%u\n",
1895 -wctx
->addr_width
, buf2
, "local",
1896 zebra_evpn_print_neigh_flags(n
, flags_buf
,
1897 sizeof(flags_buf
)), state_str
, buf1
,
1898 "", n
->loc_seq
, n
->rem_seq
);
1900 json_object_string_add(json_row
, "type", "local");
1901 json_object_string_add(json_row
, "state", state_str
);
1902 json_object_string_add(json_row
, "mac", buf1
);
1903 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DEF_GW
))
1904 json_object_boolean_true_add(json_row
,
1906 json_object_int_add(json_row
, "localSequence",
1908 json_object_int_add(json_row
, "remoteSequence",
1910 json_object_int_add(json_row
, "detectionCount",
1912 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
))
1913 json_object_boolean_true_add(json_row
,
1916 json_object_boolean_false_add(json_row
,
1920 } else if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
1921 if ((wctx
->flags
& SHOW_REMOTE_NEIGH_FROM_VTEP
)
1922 && !IPV4_ADDR_SAME(&n
->r_vtep_ip
, &wctx
->r_vtep_ip
))
1925 if (json_evpn
== NULL
) {
1926 if ((wctx
->flags
& SHOW_REMOTE_NEIGH_FROM_VTEP
)
1927 && (wctx
->count
== 0))
1928 zebra_evpn_print_neigh_hdr(vty
, wctx
);
1930 if (n
->mac
->es
== NULL
)
1931 inet_ntop(AF_INET
, &n
->r_vtep_ip
,
1932 addr_buf
, sizeof(addr_buf
));
1934 vty_out(vty
, "%*s %-6s %-5s %-8s %-17s %-30s %u/%u\n",
1935 -wctx
->addr_width
, buf2
, "remote",
1936 zebra_evpn_print_neigh_flags(n
, flags_buf
,
1937 sizeof(flags_buf
)), state_str
, buf1
,
1938 n
->mac
->es
? n
->mac
->es
->esi_str
: addr_buf
,
1939 n
->loc_seq
, n
->rem_seq
);
1941 json_object_string_add(json_row
, "type", "remote");
1942 json_object_string_add(json_row
, "state", state_str
);
1943 json_object_string_add(json_row
, "mac", buf1
);
1945 json_object_string_add(json_row
, "remoteEs",
1946 n
->mac
->es
->esi_str
);
1948 json_object_string_addf(json_row
, "remoteVtep",
1949 "%pI4", &n
->r_vtep_ip
);
1950 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DEF_GW
))
1951 json_object_boolean_true_add(json_row
,
1953 json_object_int_add(json_row
, "localSequence",
1955 json_object_int_add(json_row
, "remoteSequence",
1957 json_object_int_add(json_row
, "detectionCount",
1959 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
))
1960 json_object_boolean_true_add(json_row
,
1963 json_object_boolean_false_add(json_row
,
1970 json_object_object_add(json_evpn
, buf2
, json_row
);
1974 * Print neighbor hash entry in detail - called for display of all neighbors.
1976 void zebra_evpn_print_neigh_hash_detail(struct hash_bucket
*bucket
, void *ctxt
)
1979 json_object
*json_evpn
= NULL
, *json_row
= NULL
;
1980 struct zebra_neigh
*n
;
1981 char buf
[INET6_ADDRSTRLEN
];
1982 struct neigh_walk_ctx
*wctx
= ctxt
;
1985 json_evpn
= wctx
->json
;
1986 n
= (struct zebra_neigh
*)bucket
->data
;
1990 ipaddr2str(&n
->ip
, buf
, sizeof(buf
));
1992 json_row
= json_object_new_object();
1994 zebra_evpn_print_neigh(n
, vty
, json_row
);
1997 json_object_object_add(json_evpn
, buf
, json_row
);
2000 void zebra_evpn_print_dad_neigh_hash(struct hash_bucket
*bucket
, void *ctxt
)
2002 struct zebra_neigh
*nbr
;
2004 nbr
= (struct zebra_neigh
*)bucket
->data
;
2008 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
))
2009 zebra_evpn_print_neigh_hash(bucket
, ctxt
);
2012 void zebra_evpn_print_dad_neigh_hash_detail(struct hash_bucket
*bucket
,
2015 struct zebra_neigh
*nbr
;
2017 nbr
= (struct zebra_neigh
*)bucket
->data
;
2021 if (CHECK_FLAG(nbr
->flags
, ZEBRA_NEIGH_DUPLICATE
))
2022 zebra_evpn_print_neigh_hash_detail(bucket
, ctxt
);
2025 void zebra_evpn_neigh_remote_macip_add(struct zebra_evpn
*zevpn
,
2026 struct zebra_vrf
*zvrf
,
2027 const struct ipaddr
*ipaddr
,
2028 struct zebra_mac
*mac
,
2029 struct in_addr vtep_ip
, uint8_t flags
,
2032 struct zebra_neigh
*n
;
2033 int update_neigh
= 0;
2034 struct zebra_mac
*old_mac
= NULL
;
2035 bool old_static
= false;
2036 bool do_dad
= false;
2037 bool is_dup_detect
= false;
2041 is_router
= !!CHECK_FLAG(flags
, ZEBRA_MACIP_TYPE_ROUTER_FLAG
);
2043 /* Check if the remote neighbor itself is unknown or has a
2044 * change. If so, create or update and then install the entry.
2046 n
= zebra_evpn_neigh_lookup(zevpn
, ipaddr
);
2047 if (!n
|| !CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)
2048 || is_router
!= !!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
)
2049 || (memcmp(&n
->emac
, &mac
->macaddr
, sizeof(struct ethaddr
)) != 0)
2050 || !IPV4_ADDR_SAME(&n
->r_vtep_ip
, &vtep_ip
) || seq
!= n
->rem_seq
)
2055 n
= zebra_evpn_neigh_add(zevpn
, ipaddr
, &mac
->macaddr
,
2058 /* When host moves but changes its (MAC,IP)
2059 * binding, BGP may install a MACIP entry that
2060 * corresponds to "older" location of the host
2061 * in transient situations (because {IP1,M1}
2062 * is a different route from {IP1,M2}). Check
2063 * the sequence number and ignore this update
2067 if (!zebra_evpn_neigh_is_bgp_seq_ok(
2068 zevpn
, n
, &mac
->macaddr
, seq
, false))
2070 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
2071 old_static
= zebra_evpn_neigh_is_static(n
);
2072 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
2074 "sync->remote neigh vni %u ip %pIA mac %pEA seq %d f0x%x",
2075 n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
2077 if (IS_ZEBRA_NEIGH_ACTIVE(n
))
2078 zebra_evpn_neigh_send_del_to_client(
2079 zevpn
->vni
, &n
->ip
, &n
->emac
,
2082 zebra_evpn_neigh_clear_sync_info(n
);
2084 if (memcmp(&n
->emac
, &mac
->macaddr
,
2085 sizeof(struct ethaddr
))
2087 /* update neigh list for macs */
2089 zebra_evpn_mac_lookup(zevpn
, &n
->emac
);
2091 listnode_delete(old_mac
->neigh_list
, n
);
2093 zebra_evpn_deref_ip2mac(zevpn
, old_mac
);
2096 listnode_add_sort(mac
->neigh_list
, n
);
2097 memcpy(&n
->emac
, &mac
->macaddr
, ETH_ALEN
);
2099 /* Check Neigh's curent state is local
2100 * (this is the case where neigh/host has moved
2101 * from L->R) and check previous detction
2102 * started via local learning.
2104 * RFC-7432: A PE/VTEP that detects a MAC
2105 * mobilit event via local learning starts
2106 * an M-second timer.
2107 * VTEP-IP or seq. change along is not
2108 * considered for dup. detection.
2110 * Mobilty event scenario-B IP-MAC binding
2113 if ((!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
))
2119 /* Set "remote" forwarding info. */
2120 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ALL_LOCAL_FLAGS
);
2121 n
->r_vtep_ip
= vtep_ip
;
2122 SET_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
);
2124 /* Set router flag (R-bit) to this Neighbor entry */
2125 if (CHECK_FLAG(flags
, ZEBRA_MACIP_TYPE_ROUTER_FLAG
))
2126 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
2128 UNSET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
2130 /* Check old or new MAC detected as duplicate,
2131 * inherit duplicate flag to this neigh.
2133 if (zebra_evpn_ip_inherit_dad_from_mac(zvrf
, old_mac
, mac
, n
)) {
2135 EC_ZEBRA_DUP_IP_INHERIT_DETECTED
,
2136 "VNI %u: MAC %pEA IP %pIA detected as duplicate during remote update, inherit duplicate from MAC",
2137 zevpn
->vni
, &mac
->macaddr
, &n
->ip
);
2140 /* Check duplicate address detection for IP */
2141 zebra_evpn_dup_addr_detect_for_neigh(
2142 zvrf
, n
, n
->r_vtep_ip
, do_dad
, &is_dup_detect
, false);
2143 /* Install the entry. */
2145 zebra_evpn_rem_neigh_install(zevpn
, n
, old_static
);
2148 /* Update seq number. */
2152 int zebra_evpn_neigh_gw_macip_add(struct interface
*ifp
,
2153 struct zebra_evpn
*zevpn
, struct ipaddr
*ip
,
2154 struct zebra_mac
*mac
)
2156 struct zebra_neigh
*n
;
2160 n
= zebra_evpn_neigh_lookup(zevpn
, ip
);
2162 n
= zebra_evpn_neigh_add(zevpn
, ip
, &mac
->macaddr
, mac
, 0);
2164 /* Set "local" forwarding info. */
2165 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
);
2166 ZEBRA_NEIGH_SET_ACTIVE(n
);
2167 memcpy(&n
->emac
, &mac
->macaddr
, ETH_ALEN
);
2168 n
->ifindex
= ifp
->ifindex
;
2170 /* Only advertise in BGP if the knob is enabled */
2171 if (advertise_gw_macip_enabled(zevpn
)) {
2173 SET_FLAG(n
->flags
, ZEBRA_NEIGH_DEF_GW
);
2174 /* Set Router flag (R-bit) */
2175 if (ip
->ipa_type
== IPADDR_V6
)
2176 SET_FLAG(n
->flags
, ZEBRA_NEIGH_ROUTER_FLAG
);
2178 if (IS_ZEBRA_DEBUG_VXLAN
)
2180 "SVI %s(%u) L2-VNI %u, sending GW MAC %pEA IP %pIA add to BGP with flags 0x%x",
2181 ifp
->name
, ifp
->ifindex
, zevpn
->vni
,
2182 &mac
->macaddr
, ip
, n
->flags
);
2184 zebra_evpn_neigh_send_add_to_client(
2185 zevpn
->vni
, ip
, &n
->emac
, n
->mac
, n
->flags
, n
->loc_seq
);
2186 } else if (advertise_svi_macip_enabled(zevpn
)) {
2188 SET_FLAG(n
->flags
, ZEBRA_NEIGH_SVI_IP
);
2189 if (IS_ZEBRA_DEBUG_VXLAN
)
2191 "SVI %s(%u) L2-VNI %u, sending SVI MAC %pEA IP %pIA add to BGP with flags 0x%x",
2192 ifp
->name
, ifp
->ifindex
, zevpn
->vni
,
2193 &mac
->macaddr
, ip
, n
->flags
);
2195 zebra_evpn_neigh_send_add_to_client(
2196 zevpn
->vni
, ip
, &n
->emac
, n
->mac
, n
->flags
, n
->loc_seq
);
2202 void zebra_evpn_neigh_remote_uninstall(struct zebra_evpn
*zevpn
,
2203 struct zebra_vrf
*zvrf
,
2204 struct zebra_neigh
*n
,
2205 struct zebra_mac
*mac
,
2206 const struct ipaddr
*ipaddr
)
2208 if (zvrf
->dad_freeze
&& CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
)
2209 && CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)
2210 && (memcmp(n
->emac
.octet
, mac
->macaddr
.octet
, ETH_ALEN
) == 0)) {
2211 struct interface
*vlan_if
;
2213 vlan_if
= zevpn_map_to_svi(zevpn
);
2214 if (IS_ZEBRA_DEBUG_VXLAN
)
2216 "%s: IP %pIA (flags 0x%x intf %s) is remote and duplicate, read kernel for local entry",
2217 __func__
, ipaddr
, n
->flags
,
2218 vlan_if
? vlan_if
->name
: "Unknown");
2220 neigh_read_specific_ip(ipaddr
, vlan_if
);
2223 /* When the MAC changes for an IP, it is possible the
2224 * client may update the new MAC before trying to delete the
2225 * "old" neighbor (as these are two different MACIP routes).
2226 * Do the delete only if the MAC matches.
2228 if (!memcmp(n
->emac
.octet
, mac
->macaddr
.octet
, ETH_ALEN
)) {
2229 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL
)) {
2230 zebra_evpn_sync_neigh_del(n
);
2231 } else if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
2232 zebra_evpn_neigh_uninstall(zevpn
, n
);
2233 zebra_evpn_neigh_del(zevpn
, n
);
2234 zebra_evpn_deref_ip2mac(zevpn
, mac
);
2239 int zebra_evpn_neigh_del_ip(struct zebra_evpn
*zevpn
, const struct ipaddr
*ip
)
2241 struct zebra_neigh
*n
;
2242 struct zebra_mac
*zmac
;
2245 struct zebra_vrf
*zvrf
;
2247 /* If entry doesn't exist, nothing to do. */
2248 n
= zebra_evpn_neigh_lookup(zevpn
, ip
);
2252 zmac
= zebra_evpn_mac_lookup(zevpn
, &n
->emac
);
2254 if (IS_ZEBRA_DEBUG_VXLAN
)
2256 "Trying to del a neigh %pIA without a mac %pEA on VNI %u",
2263 /* If it is a remote entry, the kernel has aged this out or someone has
2264 * deleted it, it needs to be re-installed as FRR is the owner.
2266 if (CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_REMOTE
)) {
2267 zebra_evpn_rem_neigh_install(zevpn
, n
, false /*was_static*/);
2271 /* if this is a sync entry it cannot be dropped re-install it in
2274 old_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
2275 if (zebra_evpn_neigh_is_static(n
)) {
2276 if (IS_ZEBRA_DEBUG_EVPN_MH_NEIGH
)
2277 zlog_debug("re-add sync neigh vni %u ip %pIA mac %pEA 0x%x",
2278 n
->zevpn
->vni
, &n
->ip
, &n
->emac
,
2281 if (!CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
))
2282 SET_FLAG(n
->flags
, ZEBRA_NEIGH_LOCAL_INACTIVE
);
2283 /* inform-bgp about change in local-activity if any */
2284 new_bgp_ready
= zebra_evpn_neigh_is_ready_for_bgp(n
);
2285 zebra_evpn_neigh_send_add_del_to_client(n
, old_bgp_ready
,
2288 /* re-install the entry in the kernel */
2289 zebra_evpn_sync_neigh_dp_install(n
, false /* set_inactive */,
2290 false /* force_clear_static */,
2296 zvrf
= zevpn
->vxlan_if
->vrf
->info
;
2298 zlog_debug("%s: VNI %u vrf lookup failed.", __func__
,
2303 /* In case of feeze action, if local neigh is in duplicate state,
2304 * Mark the Neigh as inactive before sending delete request to BGPd,
2305 * If BGPd has remote entry, it will re-install
2307 if (zvrf
->dad_freeze
&& CHECK_FLAG(n
->flags
, ZEBRA_NEIGH_DUPLICATE
))
2308 ZEBRA_NEIGH_SET_INACTIVE(n
);
2310 /* Remove neighbor from BGP. */
2311 zebra_evpn_neigh_send_del_to_client(zevpn
->vni
, &n
->ip
, &n
->emac
,
2315 /* Delete this neighbor entry. */
2316 zebra_evpn_neigh_del(zevpn
, n
);
2318 /* see if the AUTO mac needs to be deleted */
2319 if (CHECK_FLAG(zmac
->flags
, ZEBRA_MAC_AUTO
)
2320 && !zebra_evpn_mac_in_use(zmac
))
2321 zebra_evpn_mac_del(zevpn
, zmac
);