I got a message from two ABR. message says 'Maximum age reached for an LS advertisment'. But there were not any link problems(no NMS loggs). link utilization also very small. I think that there is no possibility that ospf refresh packets would be droped. So what could be the reason for this message.
Each OSPF LSA has an age, which indicates whether the LSA is still valid. Once the LSA reaches the maximum age (one hour), it is discarded. During the aging process, the originating router sends a refresh packet every 30 minutes to refresh the LSA. Refresh packets are sent to keep the LSA from expiring, whether there has been a change in the network topology or not. Checksumming is performed on all LSAs every 10 minutes. The router keeps track of LSAs it generates and LSAs it receives from other routers. The router refreshes LSAs it generated; it ages the LSAs it received from other routers.
Actually I knew the concept of the ospf refresh packets. But in my problem I got an MaxAge reached problem for an LSA. this means there was a drop of ospf refresh packet. But this is to happen there should be a link down or link congestion. But there was no evidance for link down or link congestion. so I am seprise that what could be the reson for drop of ospf refresh packet.
I really need to know that is there any possiblity to drop ospf referesh packet with out any congestion in links? Or what are the possiblities that summary LSA reaches the MaxAge except following reasons,
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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