Regarding source based outbound routing (with redundancy)

Hello there! I am trying to do a source based outbound routing between multiple upstreams. Usually I picked outbound via localpref but here I wish to use Provider 1 for say 10.10.10.0/24 while provider 2 for small chunk of it say 10.10.10.0/28. I wish to keep failover support and thus so if provider 2 fails, I wish to push traffic again via Provider 1. Is this is possible only with VRF or I can push for some specific match rule in route maps? Thanks. -- Anurag Bhatia anuragbhatia.com Linkedin <http://in.linkedin.com/in/anuragbhatia21> | Twitter<https://twitter.com/anurag_bhatia> Skype: anuragbhatia.com