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Keeping Aggregate Addresses in BGP From Entering the Local Routing Table

I have configured an aggregate address in BGP on a Cisco 2500 router. I need to send the aggregate to my external BGP (eBGP) neighbor, but I want to keep this route out of the IP routing table in which it is locally configured. This route is causing a major routing loop.

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Anonymous
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Re: Keeping Aggregate Addresses in BGP From Entering the Local R

Do an aggregate address command on a router. Then create extended ACL permitting or denying a particular network(s) with specific masks. and apply it to a neighbor by using neighbor x.x.x.x distribute-list Y out

you can specify to let only 133.3.0.0 to ebgp neighbor and only more specific routes 133.3.1.0 and 133.3.2.0 to your IBGP neighbor. all you have to know is how to manipulate extended acls and match on mask. unfortunately there's no easier way to do it.

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