IPv6 contact for www.citrix.com - MTU problem?

[Brandon Applegate]

On Thu, 18 Aug 2011, Daniel Roesen wrote:

> Can you lower your own end's tunnel MTU to 1280 and see what happens?
> If their MSS is 1360, I guess their server NIC MTU is set to 1420 or
> so - if this is lower than your tunnel MTU, you won't see any
> fragmentation-related problems (their side not reacting to "frag needed"
> ICMP) indeed.
>

Yes, broken with my tunnel @ 1280.  Looks like a classic PMTUD blackhole 
on their end.  My box sends them packet too big, they keep sending 1360.
x
--
Brandon Applegate - CCIE 10273
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