Date: Sat, 12 Apr 2008 01:02:14 -0500 From: Kevin Day <toasty@dragondata.com> To: Markus Boelter <m@freebsd.org> Cc: hackers@freebsd.org Subject: Re: www.FreeBSD.org IPv6 broken? Message-ID: <883CE4E8-4B70-4C56-9F1B-A6BCE67D85B5@dragondata.com> In-Reply-To: <20080412051535.GC36035@rebooten.de> References: <20080412051535.GC36035@rebooten.de>
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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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