I have this scenario (Router1 es a switch layer 3 of 3com and the rest cisco routers)
LAN RouterA1 ---FR--RouterA2 LAN
In this moment I have redundancy, the principal link is de RouterA1 with RouterA2, if the Router A2 down the router B2 take the control (stanby configuration) and the routing change because i use EIGRP in the four cisco routers, if only the link FR fail also de EIGR send the trafic to dsl (redundancy). The redundancy is ok
Now the question, I want to send the no critical trafic (https, pop3, ftp) to dsl and the rest critical data to FR but if the dsl link fail send all the trafic to dsl and also if FR fail send all the trafic to DSL.
I try to do this whith Policy routing (I put a rule in the the Router A2 what send the trafic https to RouterB2 and a rule in the Router A1 to send https to Remote LAN to the router B1) the problem was if the DSL link down the policy routing rule continuos send the trafic to dsl (down) and the https traffic down, I don´t know how to make a policy routing rule that if send trafic to a next router but if this fail send the trafic to another router or may exist a best solution thah polcy routing.