congestion between Cogent and CenturyLink

Fri Feb 28 03:04:34 UTC 2014

+1, which semi-large eyeball does Cogent NOT have capacity problems to?

On 2/28/2014 午前 11:55, Suresh Ramasubramanian wrote:
> 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
>>