proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-06-04 04:38:44 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

bgpd: fix bgp vrf instance creation from implicit

Browse Source 
In bgp route leak, when import vrf x is executed,
it creates bgp instance as hidden with asn value as unspecified.

When router bgp x is configured ensure the correct as,
asnotation is applied otherwise running config shows asn value as 0.

This can lead to frr-reload failure when any FRR config change.

Fix:
Move asn and asnotiation, as_pretty value in common done section,
so when bgp_create gets existing instance but before returning
update asn and required fields in common section.

In bgp_create(): when returning for hidden at least update asn
and required when bgp instance created implicitly due to vrf leak.

if (hidden) {
    bgp = bgp_old;
    goto peer_init; <<<
}

Before fix:
show running:

router bgp 0 vrf purple
 bgp router-id 10.10.3.11
 !
 address-family ipv4 unicast
  redistribute static
  import vrf blue
 exit-address-family
 !
 address-family ipv6 unicast
  import vrf blue
 exit-address-family
 !
 address-family l2vpn evpn
  advertise ipv4 unicast
  advertise ipv6 unicast
 exit-address-family
exit

Testing:

1) following snippet config:
router bgp 63420 vrf blue
 import vrf purple
router bgp 63420 vrf purple
 import vrf blue
2) restart frr leads to the running config with 0 asn value.

Signed-off-by: Chirag Shah <chirag@nvidia.com>
This commit is contained in:
Chirag Shah 2025-02-10 18:56:15 -08:00
parent baf4c1a78f
commit 2ff08af78e
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
bgpd/bgpd.c
View File

@ -3418,17 +3418,6 @@ static struct bgp *bgp_create(as_t *as, const char *name,
}
bgp = XCALLOC(MTYPE_BGP, sizeof(struct bgp));
bgp->as = *as;
if (as_pretty)
bgp->as_pretty = XSTRDUP(MTYPE_BGP_NAME, as_pretty);
else
bgp->as_pretty = XSTRDUP(MTYPE_BGP_NAME, asn_asn2asplain(*as));
if (asnotation != ASNOTATION_UNDEFINED) {
bgp->asnotation = asnotation;
SET_FLAG(bgp->config, BGP_CONFIG_ASNOTATION);
} else
asn_str2asn_notation(bgp->as_pretty, NULL, &bgp->asnotation);
if (BGP_DEBUG(zebra, ZEBRA)) {
if (inst_type == BGP_INSTANCE_TYPE_DEFAULT)
@ -3472,6 +3461,18 @@ static struct bgp *bgp_create(as_t *as, const char *name,
bgp->peer = list_new();
peer_init:
bgp->as = *as;
if (as_pretty)
bgp->as_pretty = XSTRDUP(MTYPE_BGP_NAME, as_pretty);
else
bgp->as_pretty = XSTRDUP(MTYPE_BGP_NAME, asn_asn2asplain(*as));
if (asnotation != ASNOTATION_UNDEFINED) {
bgp->asnotation = asnotation;
SET_FLAG(bgp->config, BGP_CONFIG_ASNOTATION);
} else
asn_str2asn_notation(bgp->as_pretty, NULL, &bgp->asnotation);
bgp->peer->cmp = (int (*)(void *, void *))peer_cmp;
bgp->peerhash = hash_create(peer_hash_key_make, peer_hash_same,
"BGP Peer Hash");