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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: [Nanog] Cogent Router dropping packets
Not sure what you are talking about, cogent is all AS174... Other than a few odd routers doing DS3 aggregation I don't think there is any old PSInet network online (other than the AS number and IP addresses). Cogent integrated acquisitions quite quickly (I was an aleron customer and it only took two months from the purchase close for us to move from AS4200 to 174). As for the two BGP peer question, they do it anywhere where they have Ethernet distribution, at least as far I can tell. That being said, we don't use them anymore since we could not get them to play-ball on pricing at larger commits either (I won't buy cogent if they don't at least match the terms of our cheapest large-network transit provider). :) John van Oppen Spectrum Networks LLC 206.973.8302 (Direct) 206.973.8300 (main office) -----Original Message----- From: manolo [mailto:[email protected]] Sent: Monday, April 21, 2008 1:03 PM To: Joe Greco Cc: [email protected] Subject: Re: [Nanog] Cogent Router dropping packets I do have to say that the PSI net side of cogent is very good. We use them in Europe without many issues. I stay far away from the legacy cogent network in US. Manolo Joe Greco wrote: >> Joe Greco wrote: >> >>> For those unfamiliar, Cogent has a system where you set up an EBGP peering >>> with the Cogent router you're connected to, for the purposes of announcing >>> your routes into Cogent. However, these are typically smaller, aggregation >>> class routers, and do not handle full tables - so you don't get your routes >>> from that router. To get a full table FROM Cogent, you need to set up an >>> EBGP multihop session with them, to their nearest full-table router. I >>> believe they actually do all their BGP connections in that manner. >>> >> Depends on the service you purchase. Fast Ethernet seems to be delivered >> as eBGP-multihop (the first hop is just a L3 switch), however DS-3 is >> handled as a single BGP session. I'm not sure if GigE or SONET services >> are handled as multihop or not. >> > > GigE is, though perhaps not in all cases (we had a client buying x00Mbps > delivered over gigE, which was definitely multihop). > > >> Probably all depends what hardware they have at each POP.... >> > > In part, I'm sure. There is also a certain benefit to having consistency > throughout your network, and it sometimes struck me that many of the folks > working for Cogent had a bit more than average difficulty dealing with the > unusual situation. This is not meant harshly, btw. Generally I like the > Cogent folks, but they (and their products) have their faults, just as any > of the competition does. > > It may also help to remember that there's "legacy" Cogent and then there's > PSI/etc. Perhaps there are some differences as a result. > > The more things you can do using the same template, the less difficult it > is to support. On the flip side, the less flexible you are ... > > ... JG > _______________________________________________ NANOG mailing list [email protected] http://mailman.nanog.org/mailman/listinfo/nanog _______________________________________________ NANOG mailing list [email protected] http://mailman.nanog.org/mailman/listinfo/nanog
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