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| author | Louis Scalbert <louis.scalbert@6wind.com> | 2024-08-22 11:29:11 +0200 |
|---|---|---|
| committer | Louis Scalbert <louis.scalbert@6wind.com> | 2025-03-10 09:54:18 +0100 |
| commit | 5cde97678e85d51a90d8bf09149cd1b3ec6a7e82 (patch) | |
| tree | 87558ba6fa7430bdf962f0b8af704bcd28156729 | |
| parent | fb8bf9cf5929967e9a453679ae7b498203936ff8 (diff) | |
zebra: fix removed default route at vrf enabling
When a routing table (RT) already has a default route before being
assigned to a VRF, the default route vanishes in zebra after the VRF
assignment.
> root@router:~# ip route add blackhole default table 100
> root@router:~# ip route show table 100
> blackhole default
> root@router:~# vtysh -c 'show ip route table 100'
> [...]
> VRF default table 100:
> K>* 0.0.0.0/0 [0/0] unreachable (blackhole), 00:00:05
> root@router:~# ip l add red type vrf table 100
> root@router:~# vtysh -c 'show ip route table 100'
> root@router:~#
Do not override the default route if it exists.
Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
| -rw-r--r-- | zebra/zebra_vrf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/zebra/zebra_vrf.c b/zebra/zebra_vrf.c index 7e53a2e804..faafcf7892 100644 --- a/zebra/zebra_vrf.c +++ b/zebra/zebra_vrf.c @@ -457,8 +457,11 @@ static void zebra_vrf_table_create(struct zebra_vrf *zvrf, afi_t afi, memset(&p, 0, sizeof(p)); p.family = afi2family(afi); + /* create a fake default route or get the existing one */ rn = srcdest_rnode_get(zvrf->table[afi][safi], &p, NULL); - zebra_rib_create_dest(rn); + if (!rn->info) + /* do not override the existing default route */ + zebra_rib_create_dest(rn); } /* Allocate new zebra VRF. */ |