On Apr 12, 2008, at 12:15 AM, Markus Boelter wrote:
Hi!
Is the ipv6 routing to www.FreeBSD.org broken? This traceroute6 is
from a
Comcast cablemodem line in Santa Clara, CA.
traceroute6 to www.freebsd.org (2001:4f8:fff6::21) from
2002:4c67:29ce::216:cbff:fead:95f9, 30 hops max, 12 byte packets
1 2002:4c67:29ce::21b:63ff:fef5:89a1 1.938 ms 0.422 ms 0.31 ms
2 2002:c058:6301:: 70.306 ms 73.252 ms 71.707 ms
3 stf.ge-1.3.0-33.core1.chi.bb6.your.org 72.595 ms 70.735 ms
71.919 ms
4 ge-0-0-1-107.cr1.ord1.us.nlayer.net 71.992 ms 70.133 ms 81.845
ms
5 xe-2-1-0.cr1.ord1.us.nlayer.net 69.469 ms 86.334 ms 71.393 ms
6 xe-2-1-0.cr2.iad1.us.nlayer.net 93.72 ms 89.703 ms 90.785 ms
7 xe-0.equinix.asbnva01.us.bb.gin.ntt.net 94.846 ms 98.588 ms
96.885 ms
8 ae-0.r20.asbnva01.us.bb.gin.ntt.net 102.865 ms 95.485 ms 95.3 ms
9 as-0.r20.snjsca04.us.bb.gin.ntt.net 173.125 ms 164.067 ms
196.141 ms
10 ae-1.r21.plalca01.us.bb.gin.ntt.net 170.93 ms 170.291 ms
161.528 ms
11 xe-3-4.r03.plalca01.us.bb.gin.ntt.net 174.246 ms 187.715 ms
179.749 ms
12 * * *
^C
I'm with your.org, the 6to4 relay provider you're using there. There
looks like there might be a MTU problem there possibly too... 12 byte
packets work for me:
traceroute6 to 2001:4f8:fff6::21 (2001:4f8:fff6::21) from
2001:4978:1:410:207:e9ff:fe13:5c82, 64 hops max, 12 byte packets
1 stf.ge-1.3.0-33.core1.chi.bb6.your.org 0.642 ms 0.498 ms 0.438
ms
2 ge-0-0-1-107.cr1.ord1.us.nlayer.net 0.519 ms 0.421 ms 0.399 ms
3 xe-2-1-0.cr1.ord1.us.nlayer.net 0.494 ms 0.431 ms 0.394 ms
4 xe-2-1-0.cr2.iad1.us.nlayer.net 56.583 ms 18.452 ms 18.444 ms
5 xe-0.equinix.asbnva01.us.bb.gin.ntt.net 23.696 ms 23.796 ms
31.787 ms
6 ae-0.r20.asbnva01.us.bb.gin.ntt.net 23.825 ms 23.790 ms 23.865
ms
7 as-0.r20.snjsca04.us.bb.gin.ntt.net 78.954 ms 78.748 ms 84.759
ms
8 ae-1.r21.plalca01.us.bb.gin.ntt.net 77.244 ms 71.859 ms 71.898
ms
9 xe-3-4.r03.plalca01.us.bb.gin.ntt.net 111.361 ms 167.676 ms
92.019 ms
10 ge-0.isc.plalca01.us.bb.gin.ntt.net 164.071 ms 203.144 ms
208.322 ms
11 gig-2-1-0.r7.pao1.isc.org 77.275 ms 77.120 ms 77.144 ms
12 ipv6gw-isc.freebsd.org 78.388 ms 78.822 ms 73.404 ms
13 www.freebsd.org 78.649 ms 78.716 ms 73.372 ms
but 1400 byte packets don't:
traceroute6 to 2001:4f8:fff6::21 (2001:4f8:fff6::21) from
2001:4978:1:410:207:e9ff:fe13:5c82, 64 hops max, 1400 byte packets
1 stf.ge-1.3.0-33.core1.chi.bb6.your.org 6.110 ms 0.984 ms 1.003
ms
2 ge-0-0-1-107.cr1.ord1.us.nlayer.net 0.974 ms 0.893 ms 0.833 ms
3 xe-2-1-0.cr1.ord1.us.nlayer.net 0.516 ms 0.453 ms 0.442 ms
4 xe-2-1-0.cr2.iad1.us.nlayer.net 18.559 ms 18.649 ms 18.588 ms
5 xe-0.equinix.asbnva01.us.bb.gin.ntt.net 24.361 ms 24.249 ms
24.193 ms
6 ae-0.r20.asbnva01.us.bb.gin.ntt.net 24.309 ms 24.405 ms 24.463
ms
7 as-0.r20.snjsca04.us.bb.gin.ntt.net 74.135 ms 79.199 ms 74.157
ms
8 ae-1.r21.plalca01.us.bb.gin.ntt.net 72.514 ms 77.348 ms 77.665
ms
9 xe-3-4.r03.plalca01.us.bb.gin.ntt.net 77.567 ms 77.494 ms
77.521 ms
10 ge-0.isc.plalca01.us.bb.gin.ntt.net 71.997 ms * 77.345 ms
11 gig-2-1-0.r7.pao1.isc.org 100.200 ms 72.491 ms 77.545 ms
12 * * *
13 * * *
Even if I force our router to take a different path, it's no better:
traceroute6 to 2001:4f8:fff6::21 (2001:4f8:fff6::21) from
2001:4978:1:410:207:e9ff:fe13:5c82, 64 hops max, 1400 byte packets
1 stf.ge-1.3.0-33.core1.chi.bb6.your.org 1.204 ms 1.052 ms 0.952
ms
2 2001:470:0:7f::1 2.728 ms 0.593 ms 0.527 ms
3 10g-3-2.core1.sjc2.ipv6.he.net 58.063 ms 58.138 ms 58.017 ms
4 10g-3-2.core1.pao1.ipv6.he.net 58.649 ms 58.773 ms 58.782 ms
5 he.pao1.isc.org 58.883 ms 58.779 ms *
6 gig-2-1-0.r7.pao1.isc.org 59.597 ms 59.443 ms 59.497 ms
7 * * *
8 * * *
Since 6to4 is asymmetrical, I'm guessing the problem is the route back
to 2002::/16 (6to4) from within ISC's network.
I'll open a ticket with ISC and see if we can figure out what the
problem is together.
-- Kevin
your.org
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