Home page logo

nanog logo nanog mailing list archives

Redundant Routes, BGP with MPLS provider
From: "Tribble, Wesley" <WTribble () sterneagee com>
Date: Thu, 30 Aug 2012 13:17:55 -0500

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 primary and backup data center locations.  The 
routes(as advertised by the vendor's routers) will be the same at both locations.  I would like to advertise the routes 
from multiple locations at the same time, rather than suppress the routes and advertise conditionally.

What is the best method to Instruct the provider's network to prefer the Primary Data Center routes over the DR site?  
Keep in mind that I am only peering with the provider over BGP and I have no visibility to the underlying MPLS 
architecture or configuration.  Although if you have specific questions  about their architecture, I can work to get 

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-path than the Primary location
-Use Community Strings to influence local preference.(Still working to find out if Provider will pass our community 

Just looking for some ideas and best practices.  Any thoughts or insight would be much welcomed and appreciated.  This 
is my first message on NANOG, so please be gentle.  I apologize in advance if I have done something incorrectly.


Sterne Agee Group, Inc. and its subsidiaries request that you do not transmit orders
and instructions regarding your Sterne Agee account by e-mail. Transactional details
do not supersede normal trade confirmations or statements. The information contained
in this transmission is privileged and confidential. It is intended for the use of the
individual or entity named above. The information contained herein is based on sources
we believe reliable but is not considered all-inclusive. Opinions are our current
opinions only and are subject to change without notice. Offerings are subject to prior
sale and/or change in price. Prices, quotes, rates and yields are subject to change
without notice. Sterne Agee & Leach, Inc. member FINRA and SIPC, is a registered
broker-dealer subsidiary of Sterne Agee Group, Inc. Generally, investments are NOT
your Financial Advisor with information regarding specific investments. Sterne Agee
reserves the right to monitor all electronic correspondence.

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]