MTU mismatch on one link

Dan White dwhite at
Fri Aug 31 14:28:44 UTC 2012

On 08/31/12 09:30 -0400, Tom Taylor wrote:
>Has anyone run into a situation where the MTU at one end of a link 
>was configured differently from the MTU at the other end? How did you 
>catch it?
>In general, do you see any need for a debugging tool to be 
>standardized to find such mismatches?

Performing a ping with a large packet size '-s', and/or with packet
fragmentation turned off '-M do' have been our primary tools for finding
MTU (layer 2 and layer 3) mismatches.

Dan White

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