IPv6 cogentco.com

[Seth Mattinen]

Garry Dolley wrote:
> On Mon, Aug 10, 2009 at 10:22:22AM -0700, Ted Mittelstaedt wrote:
>> 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).
>> We have a Looking Glass that you can use to look this up:
>>
>> http://whois.ipinc.net/cgi-bin/lg.pl
>>
>> as do many other ISPs.  And no, they aren't in our table.
>>
>> Hopefully someone can CC this to the NANOG list.
> 
> 2001:550::/32 isn't in my table either.
> 

I can see it:

routy-core0>sh bgp ipv6 unicast 2001:550::/32
BGP routing table entry for 2001:550::/32, version 4564852
Paths: (1 available, best #1, table Global-IPv6-Table)
  Not advertised to any peer
  6435 6435 701 12702 286 3549 174, (received & used)
    2620:0:950::242:128 (metric 1) from 2620:0:950::242:128 (208.79.242.128)
      Origin IGP, metric 0, localpref 90, valid, internal, best

traceroute to www.cogentco.com (2001:550:1::cc01), 30 hops max, 40 byte
packets
 1  2620:0:950:beef::242:33  0.439 ms  0.859 ms  1.995 ms
 2  2620:0:950:c2::242:149  3.127 ms  5.007 ms  4.958 ms
 3  2620:0:950:c0::242:142  1.854 ms  1.841 ms  1.827 ms
 4  2001:1888::1:16:1  156.790 ms  156.811 ms  156.798 ms
 5  * * *
 6  * * *
 7  * * *
 8  2001:7f8::11e:0:1  254.765 ms  268.849 ms  268.821 ms
 9  2001:450:2002:c1::1  275.832 ms  261.593 ms  261.538 ms
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *

But it doesn't work. Maybe someone is ignoring /48's (which is what I
announce) and there's no route back.

~Seth