Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

BGP Load Balancing & Fail Over

Hi,

We have a situation, Our Company got our own AS number with three our own /24 Subnets, and we are peering with 2 different ISP's and receiving only default routes.

We want to advertise our 3 subnet from both ISP for load balancing & fail over , two subnets will be preferred from one ISP link for incoming & outgoing traffic and one subnet will be preferred from second ISP for incoming & outgoing traffic by prepending AS-Path attribute.

With this configuration, we are able to browse all web sites except our countries web sites. Looking like Asymmetric routing is causing problems.

Now your help is required to solve this problem or someone can suggest any good design for BGP load balancing & fail over.

Subnets:

1.   X.X.22.X/24

2.   X.X.24.X/24

3.   X.X.25.X/25

Rough Topology Diagram is attached for understanding.

Thanks in Advance.

Bilal.

2 REPLIES
Bronze

BGP Load Balancing & Fail Over

Re: BGP Load Balancing & Fail Over

Check with each ISP where you want the advertised network to be less preferred how it's being treated with the ISP itself as ISPs they use bgp community strings to make a certain route preferred over same ISP for that ISP customers and this could be the reason !

Sent from Cisco Technical Support iPhone App

541
Views
0
Helpful
2
Replies
CreatePlease to create content