Re: Smallest Transit MTU

[Joe Abley <jabley () isc org>]

On 29 Dec 2004, at 16:33, Tony Rall wrote:

> But that only affects tcp traffic - it does nothing to help other
> protocols.

Are there any common examples of the DF bit being set on non-TCP 
packets?

> The better solution is to ensure that PMTUD works correctly for your
> network, and get on the case of any correspondent or provider for 
> which it
> doesn't.

Making sure that pMTUd works in your own network doesn't solve the 
problem. You need to make sure it works properly in every other network 
with which you ever might want to exchange a 1500-byte packet.


Joe