Re: Smallest Transit MTU

[Daniel Hagerty <hag () linnaean org>]

Joe Abley <jabley () isc org> writes:

> 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?

    It's not unheard of for tunelling technologies to run PMTU across
the bearer network to dynamically adjust the MTU of the tunnel.  I
think cisco supports it at least.