[c-nsp] OSPF excessive retransmissions

Mark Pace Balzan mpb at melitacable.com
Tue Sep 11 07:14:42 EDT 2007


Hi,


I have a number of cisco and non-cisco OSPF speakers on an ethernet lan
that have been working ok for a while.

I changed switch and added a new router (new boxes are cisco kit), and
Im getting the following between some neighbours and the new box:

000799: Sep 11 07:26:14.252 CET: OSPF: Killing nbr 192.168.0.33 on
GigabitEthernet2/39 due to excessive (25) retransmissions
000800: Sep 11 07:26:14.252 CET: OSPF: 192.168.0.33 address 192.168.1.67
on GigabitEthernet2/39 is dead, state DOWN
000801: Sep 11 07:26:14.252 CET: %OSPF-5-ADJCHG: Process 100, Nbr
192.168.0.33 on GigabitEthernet2/39 from FULL to DOWN, Neighbor Down:
Too many retransmissions


Anyone has any clue what the cause for OSPF re-transmissions is, and any
pointers to some explanations to understand whats happening - my search
on CCO was rather futile unfortunately.


Thanks

Mark


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