Strange IPv6 reachability problem

[Mark Elkins]

Looks good to me (from Africa)

ilinux mje # traceroute6 2001:500:61:28::70
traceroute to 2001:500:61:28::70 (2001:500:61:28::70) from
2001:42a0:1000:ff02:21b:63ff:fec0:ebd7, 30 hops max, 24 byte packets
 1  cispos2-fe0-0.posix.co.za (2001:42a0:1000:ff02::1)  3.305 ms  12.45
ms  2.802 ms
 2  cisrb1-cispta2.posix.co.za (2001:42a0:0:ff01::1)  156.674 ms  66.934
ms  31.277 ms
 3  cisldn1-cisrbc1.posix.co.za (2001:42a0:0:ff04::2)  330.389 ms
320.796 ms  262.975 ms
 4  xe-11-2-0-112.lon10.ip6.tinet.net (2001:668:0:3::4000:51)  249.284
ms  244.168 ms  245.771 ms
 5  xe-4-1-0.lon11.ip6.tinet.net (2001:668:0:2::1:1621)  286.087 ms
246.995 ms  262.1 ms
 6  xe-1-0-0.lon80.ip6.tinet.net (2001:668:0:2::152)  272.294 ms
348.771 ms  248.937 ms
 7  xe-1-1-0.nyc20.ip6.tinet.net (2001:668:0:2::1:832)  436.734 ms
453.758 ms  363.583 ms
 8  2001:504:1::a500:1280:1 (2001:504:1::a500:1280:1)  390.877 ms
391.019 ms  443.15 ms
 9  int-0-5-0-0.r1.pao1.isc.org (2001:4f8:0:1::4b:1)  494.135 ms
434.337 ms  467.165 ms
10  int-0-1.r1.atl1.isc.org (2001:4f8:0:1::49:2)  594.24 ms  516.87 ms
554.559 ms
11  mirror.mycre.ws (2001:500:61:28::70)  455.684 ms  455.437 ms
481.774 ms
ilinux mje # 

Any reason why your trace shows no reverse DNS?

On the other hand - I can't trace to your folks house (though I am
impressed they almost seem to have IPv6 connectivity!)

ilinux mje # traceroute 2607:fe70:1002:0:202:b3ff:fe30:f633
traceroute to 2607:fe70:1002:0:202:b3ff:fe30:f633
(2607:fe70:1002:0:202:b3ff:fe30:f633), 30 hops max, 80 byte packets
 1  cispos2-fe0-0.posix.co.za (2001:42a0:1000:ff02::1)  26.890 ms
29.662 ms  29.659 ms
 2  cisrb1-cispta2.posix.co.za (2001:42a0:0:ff01::1)  55.028 ms  62.556
ms  62.557 ms
 3  cisldn1-cisrbc1.posix.co.za (2001:42a0:0:ff04::2)  454.318 ms
455.068 ms  455.068 ms
 4  xe-11-2-0-112.lon10.ip6.tinet.net (2001:668:0:3::4000:51)  461.118
ms  461.117 ms  461.109 ms
 5  xe-1-0-0.lon14.ip6.tinet.net (2001:668:0:2::1:1cd2)  463.133 ms
469.350 ms  469.347 ms
 6  as3549.ip6.tinet.net (2001:668:0:3::4000:2b2)  469.267 ms  447.280
ms  446.037 ms
 7  2001:450:2002:11f::2 (2001:450:2002:11f::2)  711.690 ms  688.340 ms
682.899 ms
 8  core0-eth2.rollernet.net (2607:fe70::1:1)  685.050 ms  443.968 ms
443.558 ms
 9  2607:fe70::5:2 (2607:fe70::5:2)  445.888 ms  442.923 ms  443.637 ms
10  2607:fe70::14:2 (2607:fe70::14:2)  446.092 ms  690.199 ms  432.083
ms
11  2607:fe70:1001::2 (2607:fe70:1001::2)  467.278 ms  470.694 ms
476.571 ms
12  * * *
13  * * *
14  * * *
15  * * *


On Sun, 2011-06-19 at 16:08 -0700, Seth Mattinen wrote:
> On 6/19/2011 3:59 PM, Jeroen Massar wrote:
> 
> > Nevertheless, the point stands, do you have a traceroute from
> > source->dest, as that might at least from that POV show where the path
> > is broken, a simple ping does not show that.
> >
> 
> traceroute to 2001:500:61:28::70 (2001:500:61:28::70), 30 hops max, 40 
> byte packets
>   1  2607:fe70:1002::1  2.385 ms  2.341 ms  2.308 ms
>   2  2607:fe70:1001::1  10.189 ms  10.176 ms  10.178 ms
>   3  2607:fe70::14:1  10.536 ms  10.526 ms  11.711 ms
>   4  2607:fe70::5:2  14.571 ms  14.612 ms  14.616 ms
>   5  2607:fe70::a:1  11.650 ms  11.631 ms  11.618 ms
>   6  2607:fe70::4:1  11.582 ms  15.339 ms  16.466 ms
>   7  2600:6:300::6  20.470 ms * *
>   8  2600:0:2:1239:144:232:6:61  16.270 ms  16.079 ms  16.100 ms
>   9  2600:0:2:1239:144:232:9:224  16.996 ms 2600:0:2:1239:144:232:24:34 
>   20.877 ms 2600:0:2:1239:144:232:9:224  20.790 ms
> 10  2600:0:2:1239:144:232:18:31  25.681 ms  25.753 ms  23.043 ms
> 11  2001:504:0:1::6939:1  23.044 ms  23.801 ms  20.814 ms
> 12  2001:470:0:32::2  29.885 ms  25.846 ms  25.799 ms
> 13  * * *
> 14  * * *
> 15  * * *

> ~Seth

-- 
  .  .     ___. .__      Posix Systems - Sth Africa
 /| /|       / /__       mje at posix.co.za  -  Mark J Elkins, Cisco CCIE
/ |/ |ARK \_/ /__ LKINS  Tel: +27 12 807 0590  Cell: +27 82 601 0496

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