[c-nsp] BGP Private-AS removal

[Tassos Chatzithomaoglou]

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-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Robert Crowe (rocrowe)
> Sent: Wednesday, 15 June 2011 2:15 a.m.
> To: techtalm at gmail.com; cisco-nsp at 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: rocrowe at cisco.com
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of techtalm at gmail.com
> Sent: Tuesday, June 14, 2011 12:35 AM
> To: cisco-nsp at 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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