The K value mismatch is the result of different versions of IOS on the two routers. There is a fairly new feature in EIGRP where EIGRP will send a "goodby" message if it is about to take down an interface or terminate a neighbor relationship (based on timeout of hello or protocol stopping or some issue). When the router with newer IOS sends the goodby message (which has its K values set to zero) the router with the older IOS does not understand the goodby message concept and interprets the message as a K value mismatch. If you want to fix this error then you should upgrade the IOS version to a version that does understand the goodby message.
This does not address the underlying problem of why the router is tearing down the neighbor relationship. It probably represents a packet loss issue somewhere along the data path between the routers. Ultimately you should investigate this problem. But I believe the original question was about the K value mismatch and I have provided information for that issue.
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 customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
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