IPv6 cogentco.com

[Ethern M., Lin]

Here is the traceroute info from Taiwan:

% traceroute6 www.cogentco.com
traceroute6 to cogentco.com (2001:550:1::cc01) from
2001:c08:0:11:207:e9ff:fe15:adae, 64 hops max, 12 byte packets
 1  2001:c08:0:11::1:1  4.176 ms  4.677 ms  3.490 ms
 2  2001:c08:7f:1::1  0.667 ms  0.570 ms  0.490 ms
 3  2001:c08:7f:10::a  0.639 ms  0.696 ms  0.421 ms
 4  2001:c08:7f::2e  0.482 ms  0.471 ms  0.458 ms
 5  2001:c08:7f::21  30.764 ms  30.740 ms  30.705 ms
 6  2001:200:0:fe00::1253:0  30.902 ms  30.840 ms  30.793 ms
 7  lan-gate.jpnap.otemachi4.v6.dti.ad.jp  30.946 ms  30.869 ms  30.918 ms
 8  fa-1-3-2.a13.tokyjp01.jp.ra.gin.ntt.net  160.871 ms  160.892 ms  160.800 ms
 9  ae-3.a21.tokyjp01.jp.ra.gin.ntt.net  153.910 ms  153.511 ms  153.472 ms
10  ae-8.r20.tokyjp01.jp.bb.gin.ntt.net  268.867 ms  153.612 ms  159.711 ms
11  as-1.r20.snjsca04.us.bb.gin.ntt.net  153.830 ms  153.670 ms
ae-3.r20.osakjp01.jp.bb.gin.ntt.net  161.012 ms
12  as-2.r20.snjsca04.us.bb.gin.ntt.net  160.795 ms
po-1.r04.snjsca04.us.bb.gin.ntt.net  153.859 ms  153.936 ms
13  * * *

However it can't be reached through ping:

% ping6 www.cogentco.com
PING6(56=40+8+8 bytes) 2001:c08:0:11:207:e9ff:fe15:adae --> 2001:550:1::cc01
^C
--- cogentco.com ping6 statistics ---
62 packets transmitted, 0 packets received, 100.0% packet loss

Using telnet to test the connectivity:

% telnet www.cogentco.com 80
Trying 2001:550:1::cc01...
telnet: connect to address 2001:550:1::cc01: Operation timed out
Trying 38.100.128.10...
Connected to cogentco.com.
Escape character is '^]'.

The conclusion is: the IPv6 connectivity to Cogent is failed from Taiwan.


cheers,
Ethern

=============================
Ethern Lin <ethern at ascc.net>
Network Division
Computing Center, ACADEMIA SINICA
Phone: +886-2-2789-9953
Fax  : +886-2-2783-6444
=============================



On Tue, Aug 11, 2009 at 9:22 AM, Garry Dolley<gdolley at arpnetworks.com> 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.
>
> --
> Garry Dolley
> ARP Networks, Inc. | http://www.arpnetworks.com | (818) 206-0181
> Data center, VPS, and IP Transit solutions
> Member Los Angeles County REACT, Unit 336 | WQGK336
> Blog http://scie.nti.st
>