I have a question regarding route maps + route re-distribution from ospf into BGP.
Our network has 3 routers + currently runs ospf between them, we have upgraded our WAN links on router2 + router3-backup link to a new MPLS solution running BGP.
The current number of ospf routes on our network is 600+
The maximum number of allowed routes on the new MPLS service is 500, if we simply re-distribute ospf into BGP we will exceed our maximum allowed routing table.
Router1 is connected to the older ATM solution, which will still be in place, and certain subnets should go down this link and not sent into the MPLS links.
All other WAN traffic should go down the new MPLS links.
I think we need to implement some ospf route maps on router1 so that ony the allowed subnets will be sent onto router2 and then onto the MPLS network.
My question is where should the route maps be placed on the network to filter the traffic between the older ATM link + the new MPLS service.
Im not sure if this is the way to go, and any comments / feedback would be much appreciated.
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