congestion between Cogent and CenturyLink


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 []

26 ms 26 ms 27 ms []

43 ms 44 ms 44 ms []

44 ms 44 ms 44 ms []

43 ms 42 ms 43 ms []

49 ms 49 ms 50 ms []

But after hours latency spikes and throughput drops to less than 1Mbps. ( 4.603 ms ( 17.838 ms ( 33.156 ms ( 36.449 ms ( 89.583 ms ( 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?



With cogent? Now you will be asking us if the Pope is really Catholic :slight_smile:

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

Soon, Comcast... Given what's going on w/ them and Netflix.



I'm already seeing a huge improvement to Comcast after Netflix moved a lot of traffic off of the ports.

I saw the same effect after the Netflix peering started.