Solved

BGP Routing with 2 peers

Posted on 2013-06-07
4
284 Views
Last Modified: 2013-07-19
We have a rather unique situation within our Carrier Network.

We have our edge router (RouterA) connected to Level 3 and using the entire BGP table.

We have a service that we need to move to that router that carries specific traffic from our customer network and sends it to another router(RouterB) that acts as a VPN Peer with a foreign network.

The router that acts as a VPN Peer advertises that networks it can communicate with via BGP to our Equipment. The traffic that needs to go to that router (RouterB) must go to RouterB.

If we add the BGP ASN and receive network advertisements from routerB, is there a way we can ensure that all routes that are advertised from it, are the ones used by our RouterA to send the required traffic?

Essentially, we need to make it so that the BGP Peers from RouterB are a higher priority than the BGP Routes we have in RouterA that we receive from level 3.


Does anyone have any thoughts how we might go about that within a BGP Configuration?

Thanks!
0
Comment
Question by:shanehooton
4 Comments
 
LVL 78

Expert Comment

by:arnold
ID: 39231041
Are you trying to isolate a speifuc server to only come in via routerB?
The difficulty is that BGP advertises blocks of IPs,
What is a connection between routers and routerB?
 You could route stuff coming in from routerA to routerB.
0
 
LVL 18

Expert Comment

by:Garry-G
ID: 39231049
Essentially, we need to make it so that the BGP Peers from RouterB are a higher priority than the BGP Routes we have in RouterA that we receive from level 3.

Not sure if I understand your setup correctly, but wouldn't an increased local preference for routes received from Router B solve that? Local preference supersedes AS hop count, so you should be done at that point ...
0
 

Author Comment

by:shanehooton
ID: 39231074
Our Edge router has the entire BGP Table downloaded from Level 3. However, routes are advertised from Router B to our Edge router. We need those routes to have a higher preference than the Level 3 advertisements.

ie.. any traffic on our internal side destination for networks advertized from routerB are sent to RouterB and not upstream to Level 3.

How do we go about that
0
 
LVL 22

Accepted Solution

by:
Jody Lemoine earned 500 total points
ID: 39231621
Make sure router B's prefixes are set to a higher local preference and that they're set to use the no-export community so that you don't advertise them out to your provider. The first will make them preferred and the second will keep them local to your AS.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
IPv6 question 1 50
Cisco RV 130 - No internet on wired connections, wireless clients ok 32 99
Can't ping New Linux Servers 40 99
ACL deny / Permit 10 45
There are two basic ways to configure a static route for Cisco IOS devices. I've written this article to highlight a case study comparing the configuration of a static route using the next-hop IP and the configuration of a static route using an outg…
Creating an OSPF network that automatically (dynamically) reroutes network traffic over other connections to prevent network downtime.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

679 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question