congestion between Cogent and CenturyLink

Suresh Ramasubramanian ops.lists at gmail.com
Fri Feb 28 02:55:56 UTC 2014


With cogent? Now you will be asking us if the Pope is really Catholic :)
On 28-Feb-2014 7:43 AM, "Aidan Scheller" <aidan at aodhandigital.com> wrote:

> Hello,
>
>
>
> We send periodic 10-15Mbps bursts of traffic to a business partner and it
> appears to transition from Cogent to Century Link in Atlanta. During the
> day performance is normal and latency appears acceptable on a trace route.
>
>
>
> 12 ms 13 ms 12 ms te0-6-1-7.rcr21.msp01.atlas.cogentco.com [38.88.188.41]
>
> 26 ms 26 ms 27 ms be2410.ccr22.ord01.atlas.cogentco.com [154.54.7.229]
>
> 43 ms 44 ms 44 ms be2099.ccr22.atl01.atlas.cogentco.com [154.54.28.74]
>
> 44 ms 44 ms 44 ms be2051.ccr21.atl02.atlas.cogentco.com [154.54.0.162]
>
> 43 ms 42 ms 43 ms qwest.atl02.atlas.cogentco.com [154.54.13.30]
>
> 49 ms 49 ms 50 ms min-edge-10.inet.qwest.net [205.171.128.154]
>
>
>
> But after hours latency spikes and throughput drops to less than 1Mbps.
>
>
>
> te8-3.ccr01.msp01.atlas.cogentco.com (38.88.188.41) 4.603 ms
>
> te0-0-0-19.mpd22.ord01.atlas.cogentco.com (154.54.1.230) 17.838 ms
>
> be2099.ccr22.atl01.atlas.cogentco.com (154.54.28.74) 33.156 ms
>
> be2051.ccr21.atl02.atlas.cogentco.com (154.54.0.162) 36.449 ms
>
> qwest.atl02.atlas.cogentco.com (154.54.13.30) 89.583 ms
>
> min-edge-10.inet.qwest.net (205.171.128.150) 89.806 ms
>
>
>
> Century Link stated that Cogent is oversubscribing the link, and that
> they've requested Cogent resolve the problem, but that action has yet to be
> taken.  I've tried reaching out to Cogent but as we're not a direct
> customer they wouldn't provide assistance.
>
>
>
> Has anyone else seen similar issues?
>
>
>
> Thanks,
>
>
>
> Aidan
>


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