Re: Strange EIGRP problem

Hi,

I experienced such problem when there was L2 loop in the network. Then
EIGRP packets are duplicated and the error message for K-values
mismatch appears.
Check your L2 topology, especially switch interconnections - there may
be 2 links between switches but only one configured.

HTH,

-- 
Piotr Matusiak
CCIE #19860 (R&S, SEC)
2009/9/16 Christopher Copley <copley.chris_at_gmail.com>:
> Group,
>
> I have been hard at work and I have ran into what is a very strange issue I
> want to share, as I think it might be a good topic for the new trouble
> shooting section.   I had an issue where I had a switch and a router
> connecting via eigrp with just a very basic config.  The adjacancy kept
> bouncing and I debugged and kept getting a mismatched K value.   I did a
> show ip protocols and each neighbor had the default values.  I have a server
> on my lab so I ran wireshark  on it to see what was happening, and each
> neighbor was sending the correct k values.   I thought it was a strange
> issue with the EIGRP process, so I deleted the process and recreated on both
> the router and the switch.   After this did not work, I thought that maybe
> it was some strange layer2 issue.   I looked at my L2 data path and saw it
> was going a very strange direction.   So I cleaned up the layer2 traffic
> topology to take a more direct path, and it corrected the issue.
>
> Has anyone see the issue of weird stuff like this?  That it appear to not be
> layer 2 related per error messages and debugs, but that actually end up
> being layer 2 issues?
>
> Chris
>
>
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