Peter Bieringer wrote:

> sorry for requesting help here, but hopefully there are some 
> people on the
> list who can check this world-wide (and perhaps the problem 
> and a solution)
> 
> Me and some others to here in Germany have much troubles connecting to
> www.deepspace6.net with 6to4 address as source:
> 
> 
> Server has 2 IPv6 addresses:
> 6bone:  3ffe:8300:0:1:10:a7ff:fe16:27f4

traceroute to deepspace6.net (3ffe:8300:0:1:10:a7ff:fe16:27f4) from
3ffe:8114:2000:240:290:27ff:fe24:c19f, 30 hops max, 16 byte packets
 1  gw-20.ams-02.nl.sixxs.net (3ffe:8114:1000::26)  41.729 ms  18.702 ms
28.987 ms
 2  Amsterdam.core.ipv6.intouch.net (2001:6e0::2)  44.545 ms  38.93 ms
19.663 ms
 3  gw-viagenie-cnit.ipv6.cnit.it (3ffe:830f::3)  123.507 ms  134.928 ms
137.097 ms
 4  gw-cnit-tilab.ipv6.cnit.it (3ffe:830f::c)  182.188 ms *  208.621 ms
 5  gw-fe-na.ipv6.cnit.it (3ffe:8300::4)  220.987 ms *  207.466 ms
 6  3ffe:8300:0:1:10:a7ff:fe16:27f4 (3ffe:8300:0:1:10:a7ff:fe16:27f4)
233.201 ms  235.604 ms  230.61 ms

It's more that their prefix is oddly routed:

traceroute to fs.ipv6.cnit.it (3ffe:8300:0:1:201:2ff:fe94:df20) from
3ffe:8114:2000:240:290:27ff:fe24:c19f, 30 hops max, 16 byte packets
 1  gw-20.ams-02.nl.sixxs.net (3ffe:8114:1000::26)  32.863 ms  61.985 ms
20.157 ms
 2  Amsterdam.core.ipv6.intouch.net (2001:6e0::2)  20.134 ms  20.513 ms
33.92 ms
 3  gw-viagenie-cnit.ipv6.cnit.it (3ffe:830f::3)  123.253 ms  124.119 ms
131.484 ms
 4  gw-cnit-tilab.ipv6.cnit.it (3ffe:830f::c)  183.053 ms *  205.704 ms
 5  gw-fe-na.ipv6.cnit.it (3ffe:8300::4)  240.375 ms *  218.757 ms
 6  * * fs.ipv6.cnit.it (3ffe:8300:0:1:201:2ff:fe94:df20)  375.714 ms

Check hop 3 which effectively says it goes over viagenie...

Let's inquiry the lookingglass (http://www.sixxs.net/tools/grh/lg/)
and indeed most paths go over the US (viagenie and esnet)

> Prod :  2001:760:204:10:10:a7ff:fe16:27f4

That doesn't even trace..

traceroute to 2001:760:204:10:10:a7ff:fe16:27f4
(2001:760:204:10:10:a7ff:fe16:27f4) from
3ffe:8114:2000:240:290:27ff:fe24:c19f, 30 hops max, 16 byte packets
 1  gw-20.ams-02.nl.sixxs.net (3ffe:8114:1000::26)  19.376 ms  19.863 ms
18.647 ms
 2  Amsterdam.core.ipv6.intouch.net (2001:6e0::2)  19.79 ms  18.625 ms
18.785 ms
 3  gw.ipv6.lt (2001:778:11:5::1)  92.729 ms  97.113 ms  93.586 ms
 4  se-gw.nordu.net (2001:6e0:0:10f::2)  149.247 ms  149.174 ms  149.116 ms
 5  6net-gw.nordu.net (2001:948:0:f008::1)  149.569 ms  149.165 ms  149.517
ms
 6  * * *
 7  * * *
 8  *

No wonder IE doesn't want to open the site using IPv6...

> 
> Problem exists since two weeks or so.
> 
> Perhaps someone could check this from different 6to4 
> addresses and/or look into routing tables of such routers.
>
> See traceroutes below for more.

I rather think it is a problem at cnit then in the 6to4 setup.
They really should be checking their routing tables.
And clean them up a lot.

Greets,
 Jeroen

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