Redistribute with a more specific mask

[mvaldiviab]

Hi folks,

I have a problem that I cannot find out a good solution.

This is the topology:

Company-A send a route 10.4.0.0/16 to Our Domain through BGP. Some prefixes of this network should be learn by the Company-B.

The problem is that the Company-B don't want to receive such a big network, they only want to receive 10.4.1.0/26.

I have some restrictions:

- I can't configure static routes

- The devices I can configure are only R-A, R-B and R-C

Please help me to find a good solution for this design.

[John Blakley · Accepted solution]

This is tricky. If you're peering with bgp, you can do a conditional injection based on a route that you have. You may want to look into that:

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ftbgpri.html

[mvaldiviab]

I read it, very interesting!!!

Could be a good solution but I don't have an aggregate route and is a requirement for this solution.