[155947] in North American Network Operators' Group
Re: Redundant Routes, BGP with MPLS provider
daemon@ATHENA.MIT.EDU (Walter Keen)
Fri Aug 31 11:13:54 2012
Date: Fri, 31 Aug 2012 08:12:57 -0700 (PDT)
From: Walter Keen <walter.keen@rainierconnect.net>
To: Christopher Morrow <morrowc.lists@gmail.com>
In-Reply-To: <CAL9jLabF3LzUwHtrQhf6_v=q+Oi93Ev6Gwtef=uCi7vFxho50A@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Assuming the MPLS provider is a single company, and uses BGP at all sites to talk to your routers, I would simply set the MED (in cisco terms) to reflect what you desire.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094934.shtml
This assumes however that the failover you require is based on the router at the primary site going down. I understand it's for DR, but if you have your routing equipment on a UPS/Generator at the primary site, it's something to think about. DR may mean more than just your link or site going down, for some people it goes as far as the server farm going down (but the router still up). Something to think about.
----- Original Message -----
From: "Christopher Morrow" <morrowc.lists@gmail.com>
To: "Wesley Tribble" <WTribble@sterneagee.com>
Cc: nanog@nanog.org
Sent: Friday, August 31, 2012 7:05:17 AM
Subject: Re: Redundant Routes, BGP with MPLS provider
On Thu, Aug 30, 2012 at 2:17 PM, Tribble, Wesley
<WTribble@sterneagee.com> wrote:
> -Prepend the routes from the DR site so that they will have a longer AS-path than the Primary location
yes
