[155928] in North American Network Operators' Group
Redundant Routes, BGP with MPLS provider
daemon@ATHENA.MIT.EDU (Tribble, Wesley)
Fri Aug 31 04:08:09 2012
From: "Tribble, Wesley" <WTribble@sterneagee.com>
To: "nanog@nanog.org" <nanog@nanog.org>
Date: Thu, 30 Aug 2012 13:17:55 -0500
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hello all,
I am an Network Operator working in an Enterprise environment with offices =
all over the country(mostly connected via MPLS). We are currently working =
towards building a Disaster Recovery Site that will host some of our vendor=
routers and provide the capability to access these vendors from both our p=
rimary and backup data center locations. The routes(as advertised by the v=
endor's routers) will be the same at both locations. I would like to adver=
tise the routes from multiple locations at the same time, rather than suppr=
ess the routes and advertise conditionally.
What is the best method to Instruct the provider's network to prefer the Pr=
imary Data Center routes over the DR site? Keep in mind that I am only pee=
ring with the provider over BGP and I have no visibility to the underlying =
MPLS architecture or configuration. Although if you have specific question=
s about their architecture, I can work to get answers.
Discussing in house, we have gone over a few different options:
-Advertise specific routes from primary site and summary routes from the DR=
site. Most specific will always be chosen.
-Prepend the routes from the DR site so that they will have a longer AS-pat=
h than the Primary location
-Use Community Strings to influence local preference.(Still working to find=
out if Provider will pass our community strings)
Just looking for some ideas and best practices. Any thoughts or insight wo=
uld be much welcomed and appreciated. This is my first message on NANOG, s=
o please be gentle. I apologize in advance if I have done something incorr=
ectly.
Wes
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