John Payne wrote:
If nobody filtered BGP at all (in or out), you would have the state you
are expecting. However, you would have both a capacity problem, and an
economic failure, as you may well end up with cogent trying to send all
(much) of it's level3 destined traffic through a customer's connection
with much smaller pipes... or overloading it's connectivity to one of
its other peers. The economic failure comes because now you're
expecting a third party to transit packets between cogent and level3
without being paid for it (and some of those connections are metered).
Okay. I always figured that the difference between peering and transit
was that you paid for one and not the other. I had no idea that when you
bought transit from someone, you weren't automatically buying transit to
_all_ of that providers other connections.
Interesting. Balkanization of the Internet anyone? As one other
commenter hinted at, it does sound like a recipe for encouraging
multi-homing, even at the lowest levels. How many ASN's can the system
handle currently?
--
Jeff Shultz
- Re: Cogent/Level 3 depeering Jeff Shultz
-