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zebra: ignore sync updates from bgp if the dest ES is not ready

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In the window immediately after an ES deletion bgpd can send MAC-IP updates
using that ES. Zebra needs to ignore these updates to prevent creation
of stale entries.

Ticket: #2668488

Signed-off-by: Anuradha Karuppiah <anuradhak@nvidia.com>
This commit is contained in:
Anuradha Karuppiah 2021-08-10 08:56:55 -07:00
parent 6e59c4a71d
commit 38f681e1ca
1 changed files with 18 additions and 2 deletions
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20
zebra/zebra_evpn.c
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@ -1423,8 +1423,24 @@ void zebra_evpn_rem_macip_add(vni_t vni, const struct ethaddr *macaddr,
* REMOTE - if ES is not local
*/
if (flags & ZEBRA_MACIP_TYPE_SYNC_PATH) {
zebra_evpn_process_sync_macip_add(zevpn, macaddr, ipa_len,
ipaddr, flags, seq, esi);
struct zebra_evpn_es *es;
es = zebra_evpn_es_find(esi);
if (es && (es->flags & ZEBRA_EVPNES_READY_FOR_BGP)) {
zebra_evpn_process_sync_macip_add(zevpn, macaddr,
ipa_len, ipaddr,
flags, seq, esi);
} else {
if (IS_ZEBRA_DEBUG_EVPN_MH_ES) {
char esi_str[ESI_STR_LEN];
esi_to_str(esi, esi_str, sizeof(esi_str));
zlog_debug(
"Ignore sync-macip add; ES %s is not ready",
esi_str);
}
}
return;
}