diff options
| author | Donald Sharp <sharpd@nvidia.com> | 2024-09-11 20:19:51 +0200 |
|---|---|---|
| committer | Donald Sharp <sharpd@nvidia.com> | 2024-09-16 15:34:05 +0200 |
| commit | 3be8b48e6bab845a57b9bee83158f5b5bdf10555 (patch) | |
| tree | cae2cdf4d787482c4f0a418c6fd54afbd04f5d25 /zebra/zebra_nhg.c | |
| parent | zebra: Expose _route_entry_dump_nh so it can be used. (diff) | |
| download | frr-3be8b48e6bab845a57b9bee83158f5b5bdf10555.tar.xz frr-3be8b48e6bab845a57b9bee83158f5b5bdf10555.zip | |
zebra: Reinstall nexthop when interface comes back up
If a interface down event caused a nexthop group to remove
one of the entries in the kernel, have it be reinstalled
when the interface comes back up. Mark the nexthop as
usable.
new behavior:
eva# show nexthop-group rib 181818168
ID: 181818168 (sharp)
RefCnt: 1
Uptime: 00:00:23
VRF: default(bad-value)
Valid, Installed
Depends: (35) (38) (44) (51)
via 192.168.99.33, dummy1 (vrf default), weight 1
via 192.168.100.33, dummy2 (vrf default), weight 1
via 192.168.101.33, dummy3 (vrf default), weight 1
via 192.168.102.33, dummy4 (vrf default), weight 1
eva# conf
eva(config)# int dummy3
eva(config-if)# shut
eva(config-if)# do show nexthop-group rib 181818168
ID: 181818168 (sharp)
RefCnt: 1
Uptime: 00:00:44
VRF: default(bad-value)
Depends: (35) (38) (44) (51)
via 192.168.99.33, dummy1 (vrf default), weight 1
via 192.168.100.33, dummy2 (vrf default), weight 1
via 192.168.101.33, dummy3 (vrf default) inactive, weight 1
via 192.168.102.33, dummy4 (vrf default), weight 1
eva(config-if)# no shut
eva(config-if)# do show nexthop-group rib 181818168
ID: 181818168 (sharp)
RefCnt: 1
Uptime: 00:00:53
VRF: default(bad-value)
Valid, Installed
Depends: (35) (38) (44) (51)
via 192.168.99.33, dummy1 (vrf default), weight 1
via 192.168.100.33, dummy2 (vrf default), weight 1
via 192.168.101.33, dummy3 (vrf default), weight 1
via 192.168.102.33, dummy4 (vrf default), weight 1
eva(config-if)# exit
eva(config)# exit
eva# exit
sharpd@eva ~/frr1 (master) [255]> ip nexthop show id 181818168
id 181818168 group 35/38/44/51 proto 194
sharpd@eva ~/frr1 (master)>
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Diffstat (limited to 'zebra/zebra_nhg.c')
| -rw-r--r-- | zebra/zebra_nhg.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/zebra/zebra_nhg.c b/zebra/zebra_nhg.c index 3dc4f2437..6493ca6af 100644 --- a/zebra/zebra_nhg.c +++ b/zebra/zebra_nhg.c @@ -3782,6 +3782,17 @@ void zebra_interface_nhg_reinstall(struct interface *ifp) frr_each_safe (nhg_connected_tree, &rb_node_dep->nhe->nhg_dependents, rb_node_dependent) { + struct nexthop *nhop_dependent = + rb_node_dependent->nhe->nhg.nexthop; + + while (nhop_dependent && + !nexthop_same(nhop_dependent, nh)) + nhop_dependent = nhop_dependent->next; + + if (nhop_dependent) + SET_FLAG(nhop_dependent->flags, + NEXTHOP_FLAG_ACTIVE); + if (IS_ZEBRA_DEBUG_NHG) zlog_debug("%s dependent nhe %pNG Setting Reinstall flag", __func__, |