In the digram below all the routers are attached to a shared segment.
at the moment all know about the connected networks via OSPF and would currently talk directly to each other over a single hop.
what I want to achive is if a user in network 192.168.1.0 sends a packet to 192.168.4.0. then rather than CAB1 user CAB4 ip as the next hope. it uses the core as the next hope address. (IE all traffic gets routed by the Core, rather than just getting switchs through it).
I know I can achive this with route maps, but I was trying to achive it with costs, by making the core links to the CABS low cost, but the links between the cabs high cost. So OSPF would choses the double hop as the prefered route.
But I can't get this to work, any suggestions how I might achive this.
I want all traffic routed by the central CORE as all traffic needs to be filtered by the same rule sets, And as the central router is a beefy beast and the traffic from each CAB being low I am not worried to much about any proformance hits I might take.
