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

Brandon Applegate brandon at burn.net
Thu Aug 18 13:55:09 CEST 2011


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
PGP Key fingerprint:
7407 DC86 AA7B A57F 62D1 A715 3C63 66A1 181E 6996
"SH1-0151.  This is the serial number, of our orbital gun."




More information about the ipv6-ops mailing list