> I've tried searching around for this problem but haven't found much info. > > We upgraded some 7301 routers the other night
to which software? > 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# we've seen this once in an environment where the path/interface MTU didn't match.. can you check the MTU on the interface(s) and the MSS negotiated? TCP transaction debug might help.. oli _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/