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zebra: add comment about Linux ifdown handling

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Signed-off-by: David Lamparter <equinox@diac24.net>
This commit is contained in:
David Lamparter 2018-10-23 12:42:06 +02:00
parent 212df1de28
commit ef57f35f41
1 changed files with 4 additions and 0 deletions
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4
zebra/zebra_rib.c
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@ -1400,6 +1400,10 @@ static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn,
} }
/* Update nexthop for route, reset changed flag. */ /* Update nexthop for route, reset changed flag. */
/* Note: this code also handles the Linux case when an interface goes
* down, causing the kernel to delete routes without sending DELROUTE
* notifications
*/
if (!nexthop_active_update(rn, old, 1) && if (!nexthop_active_update(rn, old, 1) &&
(RIB_KERNEL_ROUTE(old))) (RIB_KERNEL_ROUTE(old)))
SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); SET_FLAG(old->status, ROUTE_ENTRY_REMOVED);