In a message written on Fri, Feb 18, 2011 at 04:36:28PM -0500, Christopher Morrow wrote:
leaking the IX prefix to customers, to me, seems like a recipe for much wider/unintended leakage :(
Oh, it is. I remember when MAE-EAST was injected by at least 50 people into the DFZ because back then people weren't careful enough to just send such things to customers. AMS-IX (and others) have the better solution. They have AS1200, announce the exchange LAN from AS1200 (195.69.144.0/22). They will peer with you if you are at the exchange, see http://www.ams-ix.net/as1200-peering/. I believe, but can't find a reference really quick that they get transit for it from a couple of providers so those that don't peer still have the route. I mean really, you have a block. If your IXP matters it's already taking up space in all of the largest ISP's tables anyway, so there's no "saving a route argument". Get an ASN, which since your multi-homed is trivial, announce the block from there and peer with your exchange participants. Everyone is happy, the route is consistent, and life is good. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/