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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Cogent and Level3 Peering Issues
AOL (AS1668) stopped peering with cogent yesterday for reasons they did not disclose publicly. Cogent sends same letter to all customers who asked for what is going on and in the letter they say that two weeks ago, peering to AOL was upgraded to OC48 from OC12 and now for some reason AOL stopped peering and if somebody has questions they should call AOL to complain .. (with phone# to their NOC provided in the letter - not very nice thing to do it like this in my opinion). Afterwards direct peering to AOL was lost, cogent started sending out all their data though Level3 (AOL upstrem), making them pay for that traffic and because of amount of data the peering links got congested easily - PAIX cogent->level3 peering in bay area for example had > 1 sec latency yesterday afternoon. After I spent some time yesterday investigating all that I found that actually cogent is only using former netrail (AS4006) peering links to send data out to that is going to AS1668 and only some of those links. On the other hand most level3 destined data from cogent is sent through PSI links (i.e. 16631 174 3356).. So for me currently I put up filters to route all AS1668 and Level3 data through savvis for routes that look like (16631 4006 3356 ... ) and it works out fine for now. Today I'm going to deal with incoming traffic but the problem I had is that I could not find AOL (AS1668) looking glass, traceroute or some other tool like that. I checked traceroute.org and was very surprised that large network like theirs does not have publicly available looking glass listed. So those of you who peer with them - how do you deal with network troubleshooting when you need to check soemthing from their network side? If you know where their looking glass is - please send me a link! P.S. If somebody is seeing level3->cogent route that is congested I'd also like to know as this is something I have to deal with today as well. Send this traceroute to me privately. On Wed, 18 Dec 2002, Dale Levesque wrote: > > Anyone happen to have more information on the problems that have been > happening with the peering between Cogent and Level3. Cogent gives the > standard answer when you call support, but some more specific > information would be great. > > Thanks > Dale >
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