In an OSPF area some of the adjacences experiment issue. The problem occurs between 2 3640 linked together thanks to a switch 2950. The router display the following log and then restart the adjacence properly.
03:57:29: %OSPF-5-ADJCHG: Process 3, Nbr 188.8.131.52 on FastEthernet0/0 from FULL to EXSTART, SeqNumberMismatch
Noticed that the adjacence is actually never down therefore it receives the Hello packet. I didn't find any information about that mismatch log. Is it regarding the LSA sequence number, the neighbor ID or something else?
The message says that the OSPF neighbor was changed state from FULL to EXSTART because of the receipt of a Database Description packet from the neighbor with an Unexpected sequence number. How often do you get this message?
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...