• Welcome to Hurricane Electric's IPv6 Tunnel Broker Forums.

Why i can't acess this address [2001:470:83f2::710:1]

Started by reene2008, June 21, 2011, 09:19:01 AM

Previous topic - Next topic

reene2008

Pinging 2001:470:83f2::710:1 with 32 bytes of data:
Reply from 2001:470:83f2::710:1: TTL expired in transit.
Reply from 2001:470:83f2::710:1: TTL expired in transit.
Reply from 2001:470:83f2::710:1: TTL expired in transit.


The traceroute log shows there is loop between gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2) and 2001:470:1f05:46b:: (2001:470:1f05:46b::) ,
why does this happen ?

root@my-router:~# traceroute6 2001:470:83f2::710:1
traceroute to 2001:470:83f2::710:1 (2001:470:83f2::710:1) from 2001:470:xx:xxx::
2, 30 hops max, 16 byte packets
1 xxxxxxxx 462.937 ms  459.782 ms  464.646 ms
2  gige-g3-13.core1.hkg1.he.net (2001:470:0:ba::1)  471.736 ms  454.966 ms  445
.224 ms
3  gige-g3-7.core1.lax1.he.net (2001:470:0:16b::1)  601.472 ms  608.056 ms  623
.774 ms
4  10gigabitethernet7-3.core1.fmt2.he.net (2001:470:0:18d::1)  631.305 ms  621.
736 ms  629.472 ms
5  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  629.212 ms  616.926 m
s  601.104 ms
6  2001:470:1f05:46b:: (2001:470:1f05:46b::)  610.83 ms  623.354 ms *
7  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  644.836 ms  645.523 m
s  642.865 ms
8  2001:470:1f05:46b:: (2001:470:1f05:46b::)  643.052 ms  639.863 ms  652.648 m
s
9  * gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  767.077 ms  762.82
ms
10  2001:470:1f05:46b:: (2001:470:1f05:46b::)  756.582 ms  791.653 ms  775.611 m
s
11  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  777.414 ms  773.525 m
s  783.549 ms
12  2001:470:1f05:46b:: (2001:470:1f05:46b::)  778.206 ms  767.727 ms  778.52 ms
 789.084 mse0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  786.86 ms  782.569 ms
14  2001:470:1f05:46b:: (2001:470:1f05:46b::)  795.179 ms *  795.656 ms
15  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  800.597 ms  795.223 m
s  796.268 ms
16  * 2001:470:1f05:46b:: (2001:470:1f05:46b::)  815.287 ms  805.07 ms
17  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  814.652 ms *  816.663
ms
18  2001:470:1f05:46b:: (2001:470:1f05:46b::)  799.654 ms  801.1 ms  813.977 ms
19  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  830.469 ms  824.854 m
s  800.938 ms
20  * 2001:470:1f05:46b:: (2001:470:1f05:46b::)  838.427 ms *
21  gige-gbge0.tserv3.fmt2.ipv6.he.net (2001:470:0:45::2)  843.727 ms  820.448 m
s  822.849 ms
22  2001:470:1f05:46b:: (2001:470:1f05:46b::)  837.593 ms *



cholzhauer

It does look like there's a routing loop

Who/what is 2001:470:83f2::710:1?

Looks like an HE address, so I'd email ipv6@he.net and let them know.

And, no need to block out IP addresses, makes troubleshooting much harder

johnpoz

Man thats some crazy latency to the first hop as well.

1 xxxxxxxx 462.937 ms  459.782 ms  464.646 ms

kcochran

That high of an address off a tserv would be a routed /48.  If it's being kicked back to the tserv, that means the person who it's routed to doesn't have a route for it themselves and is left with going to default (back to the tserv).

reene2008

Quote from: johnpoz on June 22, 2011, 09:42:34 AM
Man thats some crazy latency to the first hop as well.

1 xxxxxxxx 462.937 ms  459.782 ms  464.646 ms
Yes,I'm in China, and connect from home to the he.net Tunnel Server in US, so the latency can't be low...

Sigh~  :(

snarked

There are closer tunnel endpoints than the U.S. for you:  Hong Kong and Singapore.

hunreal

Quote from: snarked on July 06, 2011, 11:04:26 AM
There are closer tunnel endpoints than the U.S. for you:  Hong Kong and Singapore.

Most US endpoints are better than HK or SG for China user. Chinese internet sux!

snarked

That may be true once network topography is determined, but there's no way any of us can tell that for him (except if we have a direct peering with his network).

reene2008

Quote from: hunreal on July 09, 2011, 08:54:21 AM
Quote from: snarked on July 06, 2011, 11:04:26 AM
There are closer tunnel endpoints than the U.S. for you:  Hong Kong and Singapore.

Most US endpoints are better than HK or SG for China user. Chinese internet sux!

Yes, you are right, I checked the ping result of those endpoints, the US endpoint is better, so i selected it.
I'm using a 10M fiber FTTH connection direct to my home, it's fast enough to open the websites in China, but the connection to US is poor.