OSPF Neighbor fails due to bad lsa ( loading state)
our backbone (6509) is connected to atm backbone (nortel passport) those are connected through gigaethernet interface and running ospf in area 0. One week ago we lost the ip connectivity between those backbones, the interfaces were in up but the neighbor relation fail and it was kept in LAODING STATE, according we the logs the neighbor relation fail becasue a BAD LSA was received (error messages %OSPF-4-ERRRCV:Bad LSU adv and %OSPF-4-BADLSATYPE:Invalid lsa:Bad LSA chksum Type 5 were received during the outage)
We check in cisco and this is quite normal behavior if we receive a bad LSA but the customer is asking why we have the same error message for long time and we didn't lost the neighbor relationship.
Somebody knows how many bad lsa we can receive before to lost the neighbor relationship.. or what kind of bag las can cause this behavior?? We receive two errors messages for bag lsa.. Somebody knows which is the different between those:
%OSPF-4-BADLSATYPE: Invalid lsa: Bad LSA chksum Type 5, Length 36, LSID 22.214.171.124 from 10.0.0.100, 10.10.3.1
%OSPF-4-ERRRCV: Received invalid packet: Bad LSU adv count from 10.10.3.241, GigabitEthernet1/21
Re: OSPF Neighbor fails due to bad lsa ( loading state)
thanks for your reply..
We have the bad lsa error message (%OSPF-4-BADLSATYPE:) for awhile (more than two months) and we didn't lost the neighbor relationship... so the customer is asking why or what cause this... do you know if there are a limit of bad lSA??... how many times the router will try to re-transmit one bad lsa.. why the router didn't reset the neighbor relationship and kept it in loading state until we reset the interface...
there is a configuration that let me reset the interface if I receive a certain number of bad lsa???
I hope you can help with those question and sorry if I disturb you too much.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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