Today I am unable to reach us.archive.ubuntu.com using IPv6. It hasn't been a problem in the past. Here's a traceroute from my home via the sixxs tunnel: joel@homestar:~$ traceroute6 2001:67c:1562::16 traceroute to 2001:67c:1562::16 (2001:67c:1562::16) from 2001:4830:1600:84bf::3, 30 hops max, 24 byte packets 1 asus-ap6 (2001:4830:1600:84bf::1) 0.416 ms 0.371 ms 0.362 ms 2 gw-1216.qas-01.us.sixxs.net (2001:4830:1600:4bf::1) 43.478 ms 44.757 ms 42.102 ms 3 sixxs-asbnva-gw.customer.occaid.net (2001:4830:e6:7::2) 42.117 ms 43.749 ms 42.195 ms 4 iad0-b0-ge2.hotnic.net (2001:4810:0:100::1) 44.889 ms 45.686 ms 42.823 ms 5 10gigabitethernet2-2.core1.ash1.he.net (2001:504:0:2::6939:1) 45.441 ms 50.657 ms 50.439 ms 6 100ge5-1.core1.nyc4.he.net (2001:470:0:299::2) 54.975 ms 55.829 ms 52.835 ms 7 * * * 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * ^C I did a trace from another machine I have that is on Comcast with native IPv6 and this is what I get: root@buffalo-ap:~# traceroute6 2001:67c:1562::16 traceroute to 2001:67c:1562::16 (2001:67c:1562::16), 30 hops max, 16 byte packets 1 2001:558:6020:178::1 (2001:558:6020:178::1) 20.653 ms 12.957 ms 18.069 ms 2 xe-7-3-0-32767-sur01.oceancity.md.bad.comcast.net (2001:558:342:8014::1) 8.021 ms 39.921 ms 9.609 ms 3 ae-44-0-ar04.whitemarsh.md.bad.comcast.net (2001:558:340:44f::1) 14.145 ms 13.058 ms 13.111 ms 4 he-3-5-0-0-11-cr01.newyork.ny.ibone.comcast.net (2001:558:0:f63f::1) 19.622 ms 21.839 ms 19.194 ms 5 he-0-13-0-0-pe03.111eighthave.ny.ibone.comcast.net (2001:558:0:f56d::2) 18.502 ms 19.108 ms 18.116 ms 6 be7922.ccr21.jfk10.atlas.cogentco.com (2001:550:3::2a9) 20.097 ms 18.039 ms 22.774 ms 7 be2057.ccr42.jfk02.atlas.cogentco.com (2001:550:0:1000::9a36:50b1) 18.420 ms 18.397 ms 18.647 ms 8 be2096.ccr22.bos01.atlas.cogentco.com (2001:550:0:1000::9a36:1e2a) 24.381 ms 24.498 ms 24.214 ms 9 2001:550:2:2c::15:2 (2001:550:2:2c::15:2) 24.506 ms 23.987 ms 24.290 ms 10 economy.canonical.com (2001:67c:1562::16) 24.609 ms 23.519 ms 24.646 ms I'm not having any problem reaching either facebook or google, which is where most of my IPv6 traffic goes.