Hey Lukas, Both platforms:
7600's -> c7600s72033-advipservicesk9-mz.151-3.S4.bin ASR1001-X -> asr1001x-universal.03.13.02.S.154-3.S2-ext.SPA.bin It's a static Tunnel with FRR set. The only commonality we can find it in all cases - the forwarding path for the LSP on the midpoint is ECMP ... The crap thing is - we are having real difficulty in reproducing this in the LAB... -----Original Message----- From: Lukas Tribus [mailto:[email protected]] Sent: Tuesday, 17 November 2015 12:42 AM To: Ben Cornish; '[email protected]' Subject: RE: [c-nsp] stuck transit LSP's > Hey All, > > For the purpose of this issue / explanation.. We run lots of brocade LSP's > over top of a Cisco MPLS network. > Mostly of ASR 1K's and 7600's - all running LDP and RSVP dual stack for > transiting these LSP's. brocade MLX / CER's / CES's on the edge. > The Cisco routers are simply transiting the LSP's. > > Everything works as expected except after we see a OSPF topology change. For > example a carrier link drop and come back. > After this event, we see the odd LSP just sit in a up/down state. As in over > a hundred FRR around the issue yet one of 2 just don't. > It seems the cisco is still signals back to the brocades that the tunnel is > ok - when its clearly not. The brocades all indicate tunnels are fine. > The tunnel remains down and each end believes its up. The only > identifications we see is the 'show mpls traffic-eng tunnels' is its up/down > - on the cisco transiting LSP device. > We see next to no pattern and the issue when repeats doesn't always affect > the same LSP's. > > The only resolution is to tear the tunnel down manually and bring it back. > Re-optimisation doesn't work. > > Curious if anyone has seen an issue like this ? or any suggestions ? This happens on both ASR1k and 7600 midpoints? In different releases? What about the requested tunnel bandwidth, is it static or are you using something like auto-bw? The requested bandwidth may be the pattern you are looking for (thinking of CSCsg44555). Lukas _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
