Re: BGP advertise-best-external on RR

[Jeff Tantsura <jeff.tantsura () ericsson com>]

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 ) .
>
> Sent from my iPhone
>
> > 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 .