If i remember correctly, latest IOS-XE supports the removal of private AS from anywhere in
the as-path.
--
Tassos
Simon Allard wrote on 15/06/2011 20:14:
That only works if the private AS is originating the routes. Since the Private
AS's are actually in the middle of the path that command will do nothing.
I have been struck by this issue in the past, and the only way I could resolve
it was to change my private AS's to publics, or originate the customers routes.
I got some nasty emails from people telling me I was leaking private AS's into
the global bgp table. Not fun!
-----Original Message-----
From: cisco-nsp-boun...@puck.nether.net
[mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Robert Crowe (rocrowe)
Sent: Wednesday, 15 June 2011 2:15 a.m.
To: techt...@gmail.com; cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] BGP Private-AS removal
http://www.cisco.com/en/US/docs/ios/iproute_bgp/configuration/guide/irg_
remove_as_ps10592_TSD_Products_Configuration_Guide_Chapter.html
neighbor {ip-address | peer-group-name} remove-private-as [all [replace-as]]
Robert Crowe
Email: rocr...@cisco.com
-----Original Message-----
From: cisco-nsp-boun...@puck.nether.net
[mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of techt...@gmail.com
Sent: Tuesday, June 14, 2011 12:35 AM
To: cisco-nsp@puck.nether.net
Subject: [c-nsp] BGP Private-AS removal
Hi,
I have a situation as follows:
C1 --- P1 --- P2 --- P3 --- ISP1 --- ISP2
All routers have eBGP peer relationship were C1 holds public AS, P1 to
P3
holds private AS (each) and ISP1 is my edge router with my public AS.
Configuring remove-private-as on ISP1 wouldn't remove the private-as as it will
see it a configuration error due to public-private-public sequence.
Is there any other way to remove the private AS and preserve the AS-Path with
only public?
Best Regards,
Techtalm
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