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71 lines
2.2 KiB
71 lines
2.2 KiB
From eb3e472904e30f35825f08319608217082d4af21 Mon Sep 17 00:00:00 2001
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From: Radhika Mahankali <radhika@cumulusnetworks.com>
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Date: Mon, 9 Apr 2018 15:30:32 -0700
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Subject: [PATCH] ospf: BFD down not tearing down OSPF adjacency for
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point-to-point network
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Root Cause:
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Lookup for the point-to-point neighbor was failing because the neighbor
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lookup was based on neighbor interface IP address. But, for point-to-point
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neighbor the key is router-id for lookup. Lookup failure was causing the
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BFD updates from PTM to get dropped.
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Fix:
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Added walk of the neighbor list if the network type is point-to-point to
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find the appropriate neighbor. The match is based on source IP address of
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the neighbor since that’s the address registered with BFD for monitoring.
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Ticket: CM-20411
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Signed-off-by: Radhika Mahankali <radhika@cumulusnetworks.com>
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---
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ospfd/ospf_bfd.c | 26 ++++++++++++++++++++++++--
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1 file changed, 24 insertions(+), 2 deletions(-)
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diff --git a/ospfd/ospf_bfd.c b/ospfd/ospf_bfd.c
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index a17975270a..05ec4991e5 100644
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--- a/ospfd/ospf_bfd.c
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+++ b/ospfd/ospf_bfd.c
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@@ -202,8 +202,9 @@ static int ospf_bfd_interface_dest_update(ZAPI_CALLBACK_ARGS)
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struct interface *ifp;
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struct ospf_interface *oi;
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struct ospf_if_params *params;
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- struct ospf_neighbor *nbr;
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+ struct ospf_neighbor *nbr = NULL;
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struct route_node *node;
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+ struct route_node *n_node;
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struct prefix p;
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int status;
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int old_status;
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@@ -231,7 +232,28 @@ static int ospf_bfd_interface_dest_update(ZAPI_CALLBACK_ARGS)
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if ((oi = node->info) == NULL)
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continue;
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- nbr = ospf_nbr_lookup_by_addr(oi->nbrs, &p.u.prefix4);
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+ /* walk the neighbor list for point-to-point network */
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+ if (oi->type == OSPF_IFTYPE_POINTOPOINT) {
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+ for (n_node = route_top(oi->nbrs); n_node;
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+ n_node = route_next(n_node)) {
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+ nbr = n_node->info;
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+ if (nbr) {
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+ /* skip myself */
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+ if (nbr == oi->nbr_self) {
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+ nbr = NULL;
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+ continue;
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+ }
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+
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+ /* Found the matching neighbor */
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+ if (nbr->src.s_addr ==
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+ p.u.prefix4.s_addr)
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+ break;
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+ }
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+ }
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+ } else {
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+ nbr = ospf_nbr_lookup_by_addr(oi->nbrs, &p.u.prefix4);
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+ }
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+
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if (!nbr || !nbr->bfd_info)
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continue;
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