IPv6 cogentco.com

Bernhard Schmidt berni at birkenwald.de
Sat Aug 8 11:19:40 CEST 2009


Ryan Rawdon wrote:

> ryan at vps-mon01:~$ host cogentco.com
> cogentco.com has address 38.100.128.10
> cogentco.com has IPv6 address 2001:550:1::cc01
> 
> Can anyone actually reach them via the v6 address?  I get timeouts from 
> anywhere I have tried it so far (various points on Hurricane Electric's 
> network).

Cogent probably goes for the transit-free gig, but only seems to peer 
with GBLX, NTT and UPC so far according to GRH.

traceroute to cogentco.com (2001:550:1::cc01) from 2001:1b10:100:3::1:2, 
port 33434, from port 50360, 30 hops max, 60 byte packets
  1  backbone1-gige-0-3-15.teleport-iabg.de (2001:1b10:100:3::11)  0.453 ms
  2  mchn-s1-rou-1030.DE.eurorings.net (2001:680:0:800f::a)  0.627 ms
  3  ffm-s1-rou-1030.eurorings.net (2001:680::134:222:84:72)  9.076 ms
  4  2001:450:2002:c1::1 (2001:450:2002:c1::1)  9.517 ms
  5  2001:550:3::d (2001:550:3::d)  166.032 ms
  6  te8-2.mpd01.sjc01.atlas.cogentco.com (::ffff:154.54.6.237)  242.218 ms
  7  te7-2.mpd01.lax01.atlas.cogentco.com (::ffff:154.54.6.29)  242.355 ms
  8  te3-8.mpd01.iah01.atlas.cogentco.com (::ffff:154.54.2.197)  242.316 ms
  9  te3-7.mpd01.atl01.atlas.cogentco.com (::ffff:154.54.5.201)  242.204 ms
10  te9-4.mpd01.dca01.atlas.cogentco.com (::ffff:154.54.1.226)  242.170 ms
11  te8-1.mpd01.dca02.atlas.cogentco.com (::ffff:154.54.1.70)  242.390 ms
12  2001:550:1::1 (2001:550:1::1)  242.587 ms
13  cogentco.com (2001:550:1::cc01)  242.332 ms

The latency is a mess of course, but I can reach it just fine.

Bernhard



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