[58522] in North American Network Operators' Group
Re: BGP Path Filtering
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri May 16 20:07:57 2003
Date: Fri, 16 May 2003 20:07:31 -0400
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@merit.edu
Mail-Followup-To: nanog@merit.edu
In-Reply-To: <Pine.GSO.4.44.0305161925150.16580-100000@clifden.donelan.com>
Errors-To: owner-nanog-outgoing@merit.edu
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In a message written on Fri, May 16, 2003 at 08:00:00PM -0400, Sean Donelan=
wrote:
> Large ISPS (more than 500 eBGP neighbors and 5000 prefixes) are going to
MFN / AboveNet qualifies as a "large ISP" by your definition, yet:
> sufficient). ANS was the only major commercial provider I knew which
> explicitly configured BGP announcement filters for every network prefix
> from every source. According to studies, about 70% of large ISPs
We prefix-list filter all of our customers. We have from time to
time made an exception due to route limits, or people limits, but
we still exceed 99% of our customers are fully prefix-list filtered
on all inbound announcements. It's not that hard.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
Read TMBG List - tmbg-list-request@tmbg.org, www.tmbg.org
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