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BGP | route map

Hello!
Please help with understanding BGP route map.
I have BGP configuration with two neighbors. ISP1 and ISP2. ISP1 are primary and have higher weight value in Border Gateway Protocol -> Neighbor -> Weight.
I need specify when local users goes to specific resource only traffic in any cases goes through ISP2.

So I create Route map. Specify AS prepend, which is ASN of ISP2. So question is where I need to select that Route map? In Border Gateway Protocol -> Neighbor -> Route out? In ISP1 neighbor or ISP2 neighbor?
Thank you.

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0 Epoch over 10 years ago

I believe that you can use the route map for your outbound traffic to specific resources to have a different weight which will impact which path they take out of your network.

You should be careful about doing that though as you will create a split path, if you are making ISP 1 your primary with your BGP advertisements and prefixing, when you send traffic out ISP 2 via manual settings it is likely to come back in via ISP 1. Of course, it is more complex than this, but the general idea is the same.
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0 Epoch over 10 years ago

I believe that you can use the route map for your outbound traffic to specific resources to have a different weight which will impact which path they take out of your network.

You should be careful about doing that though as you will create a split path, if you are making ISP 1 your primary with your BGP advertisements and prefixing, when you send traffic out ISP 2 via manual settings it is likely to come back in via ISP 1. Of course, it is more complex than this, but the general idea is the same.
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BGP | route map

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