Hi all, There was this failure in SP network I work for which I can't make sense of
Seamless MPLS has been deployed Networkwide, There is a cluster of access layer routers,let me take one of them as 'A'.Router 'A' is in Ospf Area 5,It has three bgp RRs,these RRs are in the same cluster ID,and they've peered to the network main RRs.All network RRs are in the same ISIS-L2 domain.One of Area 5 RRs is connected to another Ospf Area(Area 1) with Router 'B' which is also an RR for area 1 access routers,with both ISIS and Ospf connectivity.Router A has some MPLS L3VPN services available in Router B. It was working fine.Recently,there was a new direct link introduced between Router A and B.We decided to extend Area 5 to Router B via new direct link, without adding Router B as an RR.Traffic was flowing via that link with no any issue. Yesterday we had a failure in the new link between Router A and B and Traffic from A to B failed to switch to old path.Weird thing is some services switched to old path,many others didn't,and even weirder Router A hosting same services for different sites with same vrf for service (Routing Table) also had other sites ok,and others not ok. I analyzed routing at the time, nothing seemed to be wrong except some sites were up others were not in the same area/router.And situation autorestored itself after almost an hour. Anyone with more insight, kindly assist.Thanks in advance. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
