[84262] in North American Network Operators' Group
Re: 12/8 problems?
daemon@ATHENA.MIT.EDU (Richard A Steenbergen)
Fri Sep 9 11:26:08 2005
Date: Fri, 9 Sep 2005 11:25:25 -0400
From: Richard A Steenbergen <ras@e-gerbil.net>
To: Drew Linsalata <drew@gothambus.com>
Cc: nanog@nanog.org
In-Reply-To: <4321A659.9030607@gothambus.com>
Errors-To: owner-nanog@merit.edu
On Fri, Sep 09, 2005 at 11:12:25AM -0400, Drew Linsalata wrote:
>
> Apologies for a post of an operational nature, but is anyone else seeing
> problems with AT&Ts 12/8 block?
>
> From a New York router connected to Global Crossing and Peer 1:
>
> border-1.nycmny> sh ip bgp 12.xxx.xxx.xxx
>
> BGP routing table entry for 12.0.0.0/8, version 86901457
> Paths: (2 available, best #1)
> Not advertised to any peer
> 3549 12956 26210
> 64.213.176.97 from 64.213.176.97 (208.50.59.1)
> Origin incomplete, metric 2602, localpref 100, valid, external,
> best, ref 2
> Community: 232589665 232618104
> 13768 12956 26210, (received-only)
> 64.34.84.117 from 64.34.84.117 (216.187.124.10)
> Origin incomplete, localpref 100, external, ref 2
>
> Route views is showing a 12/8 with a fair amount of dampening/flap
> penalties in the last 10-12 minutes.
Looks like 12956 is announcing some /8s to every peer and transit. Worse
still, Sprint and GX are propagating it. This is not the first time that
Telefonica has leaked a lot of garbage routes with serious network impact
as a result (nor is it the second or third, actually).
12.0.0.0/8
64.0.0.0/8
65.0.0.0/8
I'd say both GX and Sprint have a lot to answer for right about now.
--
Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
