On Sun, Nov 21, 2010 at 6:26 PM, Lobo <[email protected]> wrote: > I've tried searching around for this problem but haven't found much info. > > We upgraded some 7301 routers the other night and there are a couple of > neighbors which have not been able to re-establish themselves. Debugging > from one of the routers shows this: > > Nov 21 21:06:51.902 EST: BGP: Neighbor validation failed. Flags: 0x10, > Neighbor-topo check: passed, Router ID: 172.29.1.1 > frorr01# > Nov 21 21:07:00.098 EST: BGP: Neighbor validation failed. Flags: 0x10, > Neighbor-topo check: passed, Router ID: 172.29.1.1 > frorr01# > Nov 21 21:07:10.482 EST: BGP: Neighbor validation failed. Flags: 0x10, > Neighbor-topo check: passed, Router ID: 172.29.1.1 > frorr01# > > I've found this a great tool for working through BGP neighbor problems: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009478a.shtml#bgp_trouble_neighbor
<http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009478a.shtml#bgp_trouble_neighbor>Also - some problems I've seen / had: incorrect BGP peer IP, ASN wrong, iBGP loopback not reachable (is it in IGP?), ACL block tcp/179 things like that. Not sure if any of this helps... Kenny _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
