[134310] in North American Network Operators' Group
Re: How many legitimate cases when Origin AS in BGP announcement
daemon@ATHENA.MIT.EDU (Stephane Bortzmeyer)
Tue Jan 4 11:05:58 2011
Date: Tue, 4 Jan 2011 17:05:10 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Akmal Shahbaz <akmal_shahbaz@yahoo.com>
In-Reply-To: <602626.85859.qm@web56003.mail.re3.yahoo.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Jan 04, 2011 at 04:38:19AM -0800,
Akmal Shahbaz <akmal_shahbaz@yahoo.com> wrote
a message of 443 lines which said:
> I am looking for example routing policies when any AS receiving BGP
> advertisement changes Origin AS in BGP AS set attribute to remove
> the received AS number and puts its own AS number.[legitimate cases]
When the old origin AS was a private one? Today, with 32bits AS,
everyone should have a public AS number but, in the real world, some
people do BGP with private AS that the upstream provider has to
change.
