Robert Moskowitz wrote:
> I have a /48 native IPv6 prefix routed to my home lab.
>
> I come back from IETF, and Firefox 3.0.6 is hanging accessing
> www.ietf.org on my duo-stack Centos 5.2 laptop.
That is called a Path MTU issue.
As you have a Linux box, install the tracepath6 tool (iputils-tracepath
on Debian, probably similar package for an RPM distro) and then do a
"tracepath6 www.ietf.org" and you will see where it goes wrong, then
contact your provider and pass them that info.
It is kinda funny to see big old AT&T hanging behind OCCAID; I hope the
secretariat is not paying AT&T too much for that kind of 'transit'.
(seems that Sprint and Telia also have the route but don't play transit
for AT&T thus the only transit for AT&T is OCCAID...) Lets hope that
improves soon...
Greets,
Jeroen
--
jeroen@purgatory:~$ tracepath6 www.ietf.org
1 : [LOCALHOST] pmtu 1500
2: gehenna.ch.unfix.org 1.581ms pmtu 1480
3: xen-gw.zrh.sixxs.net 26.816ms
4: ipman.zrh.sixxs.net 29.298ms
5: ge0-3.br01.zrh254.ipv6.ip-man.net 29.472ms
6: pos3-0.cr01.gva02.ipv6.ip-man.net 33.045ms
7: srp1-0.cr01.gva16.ipv6.ip-man.net 33.928ms
8: pos2-0.br01.ams254.ipv6.ip-man.net 51.227ms
9: amsix.r1.ams2.nl.opencarrier.eu 53.085ms
10: opencarrier-ams-px.occaid.net 71.227ms
11: bbr01-p1-0.nwrk01.occaid.net 143.202ms asymm 12
12: r1.mdtnj.ipv6.att.net 194.826ms
13: 2001:1890:61:9017::2 270.532ms
14: mail.ietf.org 263.312ms reached
Resume: pmtu 1480 hops 14 back 51
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