[74063] in North American Network Operators' Group
Re: Provider/NAP filtering policies
daemon@ATHENA.MIT.EDU (Bill Woodcock)
Mon Sep 13 13:52:35 2004
Date: Mon, 13 Sep 2004 10:41:41 -0700 (PDT)
From: Bill Woodcock <woody@pch.net>
To: JDeane@sungardfutures.com
Cc: nanog@merit.edu
In-Reply-To: <FAC2A70D63CFF249BFE0291EE9001E520226EF0F@e2kfutures1.internal.sungard.corp>
Errors-To: owner-nanog-outgoing@merit.edu
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
