virtual router on a cat4500

[Eli Kagan]

Hi all,I need community feedback about carving a virtual router instance out of Cat4507r+e Sup7-e. Let me explain. I have a pair of said Cat4507 running as distribution switches. I need to add two new routers to terminate MPLS VPN connection. Currently this connection terminates on a firewall, which is not ideal and I would like to change it. Hence, two new routers. And then I thought, why not create a vrf on the catalyst and use it as my CE. All I need is two interfaces, BGP and OSPF. So physically I would still have same Cat4507 but logically it would be   [L3 distribution] --- [ firewall ] --- [ mpls ce ]where distribution is the default VRF on the Cat4507 and CE is the new VRF on the same Catalyst.Any reasons why I should not do it?One concern I have is running OSPF between these two VRFs.Any insight would be greatly appreciated.Thanks,Eli