On 22 September 2015 at 23:59, CiscoNSP List <[email protected]> wrote:
> Hi Everyone, > > > > Bit of a strange one. > > > > 2 x ASR1001's (ASR1 and ASR2) directly connected (POPA), with OSPF, MPLS > and BGP established > > > > ASR1 connects to POPB (ME36001), also with OSPF, MPLS and BGP established > > > > ME36001 connects to ME36002 at POPB, also with OSPF, MPLS and BGP > established > > > > ME36002 connects to an ASR1006 at POPC, also with OSPF, MPLS and BGP > established > > > > We have a new link connecting to ASR2(POPA) that goes to POPD, also with > OSPF, MPLS and BGP established - but OSPF cost set high so that it is not > used...due to a strange outage it causes when OSPF is set to no cost. > > > > As soon as the new link on ASR2(POPA) and ASR1006(POPD) OSPF is set to no > cost, ASR2(POPA) for some reason establishes LDP to ME36002(POPC) - but it > has no direct connection to this device, nor is targetted LDP enabled to > this device, and ASR1(POPA) establishes LDP to ASR1006(POPC) - but it also > has no direct connection to this device, nor is targetted LDP enabled to > this device....result of these LDP sessions establishing is ASR1(POPA) > losing BGP neighbourships to three other routers that are connected via the > ASR1006(POPC). > > > > Ive opened a TAC case, but if anyone can explain how/why the LDP sessions > would establish when this new link is "activated" it would be greatly > appreciated! > > > > Cheers. > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > Have you turned on remote-lfa under OSPF? This will dynamically create targeted LDP sessions. Regards, Dan _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
