[99902] in North American Network Operators' Group
Upstreams blocking /24s? (was Re: How Not to Multihome)
daemon@ATHENA.MIT.EDU (David Conrad)
Mon Oct 8 19:19:10 2007
In-Reply-To: <20071008144849.6370A2D2@resin18.mta.everyone.net>
Cc: <nanog@merit.edu>
From: David Conrad <drc@virtualized.org>
Date: Mon, 8 Oct 2007 16:06:52 -0700
To: <surfer@mauigateway.com>
Errors-To: owner-nanog@merit.edu
Hi,
On Oct 8, 2007, at 2:48 PM, Scott Weeks wrote:
> However, if it's less than a /24 it won't get very far as most
> upstreams block prefixes longer than a /24.
I'm curious: a couple of people have indicated they do not believe
this to be the case. Anybody have any hard data on what filters are
actually in use today?
Others have indicated that such filters (assuming they exist) will
not last in the face of paying customers presenting longer than /24
prefixes for routing. Specifically, that ISPs will relax their
filters (allowing longer than /24) in order to get their peers to
accept their long prefixes. Anybody have an opinion on the
likelihood of this?
Thanks,
-drc
