On 11/11/11 6:30 PM, John Elliot wrote:
OSPF Issue Hope someone can assist with an ospf problem - We have an existing ospf adj running fine between R1+R2, we have just provisioned a second link, enabled ospf and we see it form adjacency which lasts ~60seconds, then R1 sees R2 as dead, and R2 Cannot see ourself in hello from R1, and then the whole thing starts again. With both adj. up(From R1): Neighbor ID Pri State Dead Time Address Interfacexxx.xxx.76.248 1 FULL/DR 00:00:00 xxx.xxx.66.62 Port-channel1.87xxx.xxx.76.248 1 FULL/DR 00:00:39 xxx.xxx.66.2 FastEthernet3/0 Then "new" link loses adj. after ~60seconds Neighbor ID Pri State Dead Time Address Interfacexxx.xxx.76.248 1 FULL/DR 00:00:38 xxx.xxx.66.2 FastEthernet3/0 NB - pings to/from both R1+R2 are clean(No loss/excessive latency), and both ends(Ints) set to mtu of 1500.
Right, both ends are set to mtu of 1500. Does it pass 1500? ping <far-side> df size 1500 I'm suspecting an intermediate (carrier) MTU problem. Neighboring up uses small-enough packets, but delivering the initial load of routing data hits the MTU problem and the session melts down. pt _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
