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

[Grant Moritz]

Same issue here with trace route but able to browse on native dual stacked
home connection.

  1    <1 ms    <1 ms    <1 ms
 2001-44b8-019a-c500-0000-0000-0000-0001.static.i
pv6.internode.on.net [2001:44b8:19a:c500::1]
  2    25 ms    26 ms    25 ms  loop0.lns20.adl2.internode.on.net[2001:44b8:802
0::a]
  3    24 ms    25 ms    25 ms  te3-3.cor3.adl2.internode.on.net[2001:44b8:8020
:e::1]
  4    25 ms     *       26 ms  g8-1.bdr1.adl6.internode.on.net[2001:44b8:8060:
25::1]
  5    48 ms     *       48 ms  pos1-0-0.bdr1.syd7.internode.on.net[2001:44b8:8
060:1::a]
  6    48 ms     *       47 ms  gi6-0-0-151.bdr1.syd6.internode.on.net[2001:44b
8:b060:151::1]
  7   196 ms   196 ms   197 ms  pos6-0.bdr1.lax1.internode.on.net[2001:44b8:b06
0:1::a]
  8   196 ms   196 ms   196 ms  2001:504:13::1a
  9   232 ms   197 ms   197 ms  2001:470:0:1e6::2
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14   328 ms   337 ms   330 ms  2001:1890:111e:201::15


On Thu, Aug 18, 2011 at 9:25 PM, Brandon Applegate <brandon at burn.net> wrote:

> 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."
>
>
>


-- 
Thanks,

Grant Moritz
AVCon Webhost / Forum Administrator
AVCon 2011 Events Staff
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