[j-nsp] BFD between Cisco - Juniper when FRR is enabled does not torn down primary tunnel
cj11st at gmail.com
Fri Apr 3 15:02:44 EDT 2009
we have run into a problem with BFD between Cisco and Juniper box when
MPLS-FRR is configured.
ISIS is used as IGP protocol and one hop MPLS-TE tunnels are configured with
link protection. BFD is configured on both sides (under IS-IS protocol).
After primary logical link is dropped between Cisco-Juniper (simulating DWDM
system), BFD session and isis adj are torn down on both sides. The problem
is that Juniper does not signal to MPLS-TE FRR that physical interface is
logicaly down and FRR should be used. Instead it keeps primary tunnel up
showing faulty interface as outgoing. The result is that traffic is
blackholed. On the other side Cisco re-routes traffic corectly.
Am I missing some configuration or this is a known issue?
Config on both sides (FRR without BFD works fine):
hold-time up 0 down 0;
"$9$9cAaCORSrvxNd9AIclKx7jHqmfzAtO1IcApclMXbwHqm"; ## SECRET-DATA
overload timeout 600;
level 1 disable;
authentication-key "$9$L04XVYoJD.P5bsfz3/0OxNd"; ## SECRET-DATA
On Cisco side I have under interface:
bfd interval 300 min_rx 300 multiplier 3
and under router isis:
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