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zebra: fix missing kernel routes

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The `rib_update_handle_kernel_route_down_possibility()` didn't consider
the kernel routes ( blackhole )  without interface.  When some other
interfaces are down, these kernel routes will be wrongly removed.

Signed-off-by: anlan_cs <anlan_cs@126.com>
(cherry picked from commit 44a82da405)
This commit is contained in:
anlan_cs 2024-10-31 22:44:05 +08:00 committed by Mergify
parent 02f4fef5ff
commit 3cb4dcda5c
1 changed files with 1 additions and 1 deletions
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zebra/zebra_rib.c
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@ -4490,7 +4490,7 @@ rib_update_handle_kernel_route_down_possibility(struct route_node *rn,
struct interface *ifp = if_lookup_by_index(nexthop->ifindex,
nexthop->vrf_id);
if (ifp && if_is_up(ifp)) {
if ((ifp && if_is_up(ifp)) || nexthop->type == NEXTHOP_TYPE_BLACKHOLE) {
alive = true;
break;
}