On Thu, Apr 17, 2008 at 14:50:47 +0200, Julien Cristau wrote: > I seem to have trouble sending mail to liszt over ipv6. The connection > is established ok, the data is sent, and then liszt's MTA times out > (this might be unrelated to ipv6, but the subsequent delivery attempt > over ipv4 always succeeds).
Looks like a pmtu discovery issue. ping6 -s 1438 works, ping6 -s 1439 doesn't. The route seems to be: 1. 2001:41d0:1:63ff:ff:ff:ff:ff 2. 2001:41d0::592 3. 2001:5a0:1900::9 4. 2001:5a0:1900::2 5. 2001:5a0:0:100::a 6. 2001:5a0:1400::1 7. 2001:5a0:200:200::1 8. 2001:5a0:200:100::1 9. 2001:5a0:200::5 10. 2001:5a0:200::10 11. 2001:2000:3081:3::2 12. 2001:41b8:0:f006::5 13. 2001:41b8:0:1003:213:21ff:fe20:1 ... and stops after 2001:5a0:200::5 when increasing the packet size. tracepath6 gets stuck at the same point. Not sure what I can do :/ Cheers, Julien -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
