On Saturday, July 13, 2002, at 06:17 , Stephen Stuart wrote:
>> Legend speaks of a well known BGP community referred to as 'no export',
>> which causes people with no direct connections to $carrier to not
>> have to listen to all that extra junk while still engineering inbound
>> traffic w/ more specifics for people who peer directly in diverse
>> locations. Amazing!
>
> Indeed, I know from personal experience the heartbreak of supplying
> no-export to a BGP peer who does not honor it, and propagates the
> more-specific prefixes that I give them globally.
The earlier comment made reference to 1221's prestigious and long-held
position at the top of the CIDR report.
Rumour has it that the deaggregated set of long-prefix routes advertised
by 1221 to its peers and transit providers is there because of the
requirement of 1221 to balance inbound traffic from ASes with which 1221
does not directly peer (as in BGP), over an array of random legacy
transmission capacity under and around the Pacific. It is not obvious
how no-export helps with this general problem (although see
draft-ietf-ptomaine-nopeer-00).
[I am not now, nor have I ever been involved in designing or applying
routing policy for AS1221, but I have been known to drink the occasional
beer with people who have.]
Joe