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How many legitimate cases when Origin AS in BGP announcement changed by another AS?
- Subject: How many legitimate cases when Origin AS in BGP announcement changed by another AS?
- From: bortzmeyer at nic.fr (Stephane Bortzmeyer)
- Date: Tue, 4 Jan 2011 17:05:10 +0100
- In-reply-to: <[email protected]>
- References: <[email protected]> <[email protected]>
On Tue, Jan 04, 2011 at 04:38:19AM -0800,
Akmal Shahbaz <akmal_shahbaz at 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.