Support for dual AS and AS migration

[Ondrej Zajicek]

On Sun, Feb 18, 2018 at 05:00:36PM +0000, Adam Król wrote:
> Is there any description how does AS path look like in that kind of configuration?
> 
> Let's consider that scheme:
> 
> PEER A		<->		ISP (bird - one instance)	<->	PEER B
> AS 65499 	<->	 AS 65505 		AS 65510	<->	AS 65496
> 
> How side A see side B? Bird adds all AS numbers of ISP to AS path?

Hi

When route is exported to a BGP peer, BIRD prepends ASN based on ASN of
exporting BGP protocol instance. Therefore, only one ASN is prepended to
AS path automatically. If you want to have both AS numbers in AS path,
you would have to use filters.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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