Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Running HSRP with BGP in dual homed multi-isp configuration

Posted on 2003-11-11
3
Medium Priority
?
1,128 Views
Last Modified: 2009-07-29
Hi..

My current setup is as follows: I have 2 7200's peering with two separate ISPs and i am running IBGP between the edge routers.

I am concerned that if the ethernet interface on any of the 7200 fails, will the ISP routers be informed that the route no longer exists and if so, can i run HSRP to track the ethernet interface, so that all the traffic gets routed over the second edge router.

Thanks in advance...

Hassan
0
Comment
Question by:babanmutum
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 12

Accepted Solution

by:
Scotty_cisco earned 240 total points
ID: 9734361
Hassan;

Your answer is if your router running BGP does not have an interface or a static route to the advertised network your router will not advertise the network. Hence your ISP should no longer advertise the network and everything will reconverge through the second ISP.  This does not solve your basic problem on best path selection I have answered that seperatly below.  for instance lets say you are advertising the 166.30.35.0/24 network and your Fastethernet on your primary router is 166.30.35.2 and the secondary router is 166.30.35.3 and you have no static route in any of the routers pointing to 166.30.35.0 when the fastehernet on the primary router fails all routes you are advertising for the 166.30.35.0; in that router only; get deleated from the routing table; and then the new routing table is re-advertised to your ISP minus the 166.30.35.0 network.

I had this exact same issue and the way I corrected may not work for you when it comes to best path selection.  I have 2 Fastethernet interfaces and used a crossover cable between the 2 routers between the second interfaces and created a new neigbor for both routers.  There is one Key thing that you must do if you do this however; that is in your Router BGP configuration make sure you issue this command "no synchronization".  This speeds up the process of routes updating especially if your ISP does not flush the routes.

0

Featured Post

Technology Partners: 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

It happens many times that access list (ACL) have to be applied to outgoing router interface in order to limit some traffic.This article is about how to test ACL from the router which is not very intuitive for everyone. Below scenario shows simple s…
The Cisco RV042 router is a popular small network interfacing device that is often used as an internet gateway. Network administrators need to get at the management interface to make settings, change passwords, etc. This access is generally done usi…
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…
Suggested Courses

618 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