On 24 September 2015 at 10:51, Dan Peachey <[email protected]> wrote: > 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 loves willies
This is exactly what I was thinking. Are you using LFA/FRR, so these are backup LSP? Cheers, James. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
