From: Marko Milivojevic (markom@vodafone.is)
Date: Thu Jun 07 2007 - 21:26:43 ART
Make sure that all OSPF have the same MTU or configure "ip ospf mtu-ignore"
on them.
> Has anybody seen a problem where you have ip ospf network
> point-to-multipoint enabled (with OSPF neighbor statements) on an
> interface that is actually in an ethernet broadcast segment and get the
> error to many DBD retransmitions. The problem eventually solved itself
> after many hours (after giving up on it) and all the neighbor
> relationships came up but of course, that is unsat. The problem we
> think it might be is that it is multicasting and unicasting out to its
> neighbors at the same time and it might be causing problems. Seen a few
> threads online where adding the non-broadcast keyword to the network
> type actually fixed this problem. Would you agree to this or know of
> any documentation that states this issue and the reason behind it.
> Thanks for your help! Let me know if you have any questions.
>
>
>
>
>
> Jun 2 20:26:32: %OSPF-5-ADJCHG: Process 11456, Nbr 0.0.0.0 on
> GigabitEthernet4/0.100 from DOWN to DOWN, Neighbor Down: Ignore timer
> expired
>
> Jun 2 20:47:49: %OSPF-5-ADJCHG: Process 11456, Nbr 10.10.64.8 on
> GigabitEthernet4/0.100 from EXSTART to DOWN, Neighbor Down: Too many DBD
> retransmitions
>
> Jun 2 20:48:49: %OSPF-5-ADJCHG: Process 11456, Nbr 0.0.0.0 on
> GigabitEthernet4/0.100 from DOWN to DOWN, Neighbor Down: Ignore timer
> expired
>
> Jun 2 20:50:02: %OSPF-5-ADJCHG: Process 11456, Nbr 10.10.64.8 on
> GigabitEthernet4/0.100 from EXSTART to DOWN, Neighbor Down: Too many DBD
> retransmitions
[snip]
This archive was generated by hypermail 2.1.4 : Sun Jul 01 2007 - 17:24:47 ART