Hi, In your case I¹d recommend to use diverse path, due to its simplicity and non disruptive deployment characteristics. As you know - diverse path requires additional BGP session per additional (second, next, etc) path, in most cases not a problem, however mileage might vary. To my memory, in Cisco land - it has only been implemented in IOS, not XR, please check. Cheers, Jeff -----Original Message----- From: Diptanshu Singh <diptanshu.singh@gmail.com> Date: Monday, August 24, 2015 at 10:53 PM To: Mohamed Kamal <mkamal@noor.net> Cc: "nanog@nanog.org" <nanog@nanog.org> Subject: Re: BGP advertise-best-external on RR
Yes . In the case of diverse path , shadow route reflector will be the one wherever you enable commands to trigger diverse path computation.
Good thing with diverse path is that the RR-Clients don't have to have any support but bad thing is that it can only reflect One additional best-path( second best path ) .
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On Aug 24, 2015, at 2:31 PM, Mohamed Kamal <mkamal@noor.net> wrote:
It's only supported on the 15.2(4)S and later not the SRE train. I might consider an upgrade.
One more question regarding this, can you configure the RR to be the main and shadow RR?
Mohamed Kamal Core Network Sr. Engineer
On 8/24/2015 9:16 PM, Diptanshu Singh wrote: BGP Add-Path might be your friend . You can look at diverse-path as well .