We have a rather unique situation within our Carrier Network.
We have our edge router (RouterA) connected to Level 3 and using the entire BGP table.
We have a service that we need to move to that router that carries specific traffic from our customer network and sends it to another router(RouterB) that acts as a VPN Peer with a foreign network.
The router that acts as a VPN Peer advertises that networks it can communicate with via BGP to our Equipment. The traffic that needs to go to that router (RouterB) must go to RouterB.
If we add the BGP ASN and receive network advertisements from routerB, is there a way we can ensure that all routes that are advertised from it, are the ones used by our RouterA to send the required traffic?
Essentially, we need to make it so that the BGP Peers from RouterB are a higher priority than the BGP Routes we have in RouterA that we receive from level 3.
Does anyone have any thoughts how we might go about that within a BGP Configuration?