Cogent latency / congestion

Mon Aug 20 19:42:26 UTC 2007

> Date: Mon, 20 Aug 2007 15:21:38 -0400
> From: Mike Tancsa <mike at sentex.net>
> Sender: owner-nanog at merit.edu
> 
> 
> 
> Does anyone have any details about the Cogent outage that started 
> this morning (9am GMT-400) and is still continuing ?   If its a fibre 
> cut between Montville (NJ?) and Cleveland OH 
> (http://status.cogentco.com/) why is it so bad in Chicago and Albany 
> locations ?  Is there really that little excess capacity ?
> 
> My connection out of Toronto is pretty bad via Albany
> 
>   3  g8-22.mpd01.yyz02.atlas.cogentco.com (38.104.158.77)  7.470 
> ms  6.754 ms  6.481 ms
>   4  v3493.mpd01.yyz01.atlas.cogentco.com (154.54.5.85)  6.981 
> ms  6.730 ms  6.984 ms
>   5  g2-0-0-3490.core01.yyz01.atlas.cogentco.com (154.54.5.73)  6.482 
> ms  7.175 ms  5.974 ms
>   6  p4-0.core01.alb02.atlas.cogentco.com (66.28.4.217)  105.954 
> ms  112.055 ms  111.426 ms
>   7  p6-0.core01.bos01.atlas.cogentco.com (154.54.7.42)  115.413 
> ms  117.090 ms  113.816 ms
> 
> and Bell's through Chicago is even worse
> 
> 6  64.230.229.5 (64.230.229.5)  12.572 ms  36.983 ms  200.187 ms
>   7  64.230.242.97 (64.230.242.97)  4.685 ms  5.439 ms  3.645 ms
>   8  64.230.147.14 (64.230.147.14)  14.351 ms  15.344 ms  14.387 ms
>   9  206.108.103.142 (206.108.103.142)  14.374 ms  14.280 ms  14.255 ms
> 10  p13-0.core01.ord01.atlas.cogentco.com (154.54.11.29)  156.616 ms 
> *  142.150 ms
> 11  te3-1.mpd01.ord01.atlas.cogentco.com (154.54.1.206)  135.199 
> ms  138.900 ms *
> 12  t2-4.mpd01.mci01.atlas.cogentco.com (154.54.2.233)  152.292 
> ms  149.956 ms  148.095 ms
> 13  t4-2.mpd01.iah01.atlas.cogentco.com (154.54.5.221)  149.047 
> ms  150.556 ms  151.232 ms
> 
>          ---Mike
> 
> 
> --------------------------------------------------------------------
> Mike Tancsa,                                      tel +1 519 651 3400
> Sentex Communications,                            mike at sentex.net
> Providing Internet since 1994                    www.sentex.net
> Cambridge, Ontario Canada                         www.sentex.net/mike
> 

There is a fiber cut (occurred at about 2:11 UTC) in Ohio. I'm not sure if
that has anything to do with this problem. It is impacting some
traffic between Chicago and New York, though.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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