On Mon, 13 Sep 2004 JDeane@sungardfutures.com wrote: > I was hoping someone could point me in the direction of provider/NAP > prefix filtering policies. Most important to me is UU and Cogent, but a > concise listing of notables would be much appreciated. Just to clarify, NAPs or Internet exchanges are typically (like more than 99% of the time) layer-2 services, which don't pay attention to or care about layer-3 things like IP prefixes. A few have policies regarding what participants should filter on their own behalf, but of the four hundered odd exchanges currently operating out there, I don't know of any which filter prefixes themselves. Virtually all _providers_ over a certain size filter heavily, of course, and that's probably the portion of your question you'll get more (and more useful) answers to. -Bill