[outages] routing loop in cogent?

[Daniel Corbe]

Also call USLEC, it seems it might be a problem on their side, because  
it reaches cogent's uslec edge obviously.

On Jun 23, 2008, at 6:4317 000PM, Daniel Corbe wrote:

> You should have kept the traceroute running.  They might be passing  
> packets back and fourth a couple of dozen times as a practical joke  
> before eventually delivering the traffic to the next hop.
>
> Cogent = WIN
>
> On Jun 23, 2008, at 6:3911 000PM, Josh Fiske wrote:
>
>> Is anyone else seeing some routing loops in Cogent's network?
>>
>> ala:
>>
>> ...
>> 18  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  34.475  
>> ms  36.336 ms  34.087 ms
>> 19  uslec.iad01.atlas.cogentco.com (154.54.11.214)  39.286 ms   
>> 38.188 ms  37.530 ms
>> 20  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  33.148  
>> ms  37.066 ms  35.823 ms
>> 21  * uslec.iad01.atlas.cogentco.com (154.54.11.214)  38.403 ms   
>> 37.534 ms
>> 22  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  35.051  
>> ms  33.120 ms  34.209 ms
>> 23  uslec.iad01.atlas.cogentco.com (154.54.11.214)  39.112 ms * *
>> 24  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  34.603  
>> ms  34.994 ms  34.119 ms
>> 25  * uslec.iad01.atlas.cogentco.com (154.54.11.214)  36.929 ms   
>> 38.443 ms
>> 26  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  34.784  
>> ms  35.317 ms  33.839 ms
>> 27  uslec.iad01.atlas.cogentco.com (154.54.11.214)  37.185 ms   
>> 38.327 ms  39.863 ms
>> 28  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  35.362  
>> ms  36.451 ms  34.788 ms
>> 29  uslec.iad01.atlas.cogentco.com (154.54.11.214)  38.600 ms   
>> 39.782 ms  40.031 ms
>> 30  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  38.156  
>> ms  39.726 ms  35.726 ms
>> 31  uslec.iad01.atlas.cogentco.com (154.54.11.214)  47.281 ms   
>> 37.617 ms  49.460 ms
>> 32  gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213)  35.389  
>> ms  35.988 ms  35.609 ms
>> 33  uslec.iad01.atlas.cogentco.com (154.54.11.214)  39.162 ms   
>> 121.744 ms^C
>>
>>
>> - - - -
>> Joshua Fiske '03, '04
>> Network and Security Engineer
>> Clarkson University, Office of Information Technology
>> (315) 268-6722 -- Fax:  (315) 268-6570
>> GPG Key:  http://clarkson.edu/~jfiske/jfiske_pub.asc
>> jfiske at clarkson.edu
>>
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