MTU mismatch on one link

Mike A mikea at
Fri Aug 31 14:03:03 UTC 2012

On Fri, Aug 31, 2012 at 01:52:09PM +0000, Paul Vinciguerra wrote:
> You need to raise your MTU above that on the other side and do a ping size sweep.  Unlike at Layer-3 when you can use set a DF bit and get back an ICMP error, at Layer-2 when you exceed the far side's MTU, the packets are silently dropped.

In the past, I've found a binary search on ping size to be very
efficient. YMMV, of course. 

Mike Andrews, W5EGO
mikea at
Tired old sysadmin 

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