I have two routers 3825 both having one Internet link and MPLS link from different subscribers as shown in the attachment. Site 1 consists of RTR A and RTR B . And site 2 consists of RTR A and RTR B . Now I want to have MPLS and Internet link both to work as redundant.
Now if suppose one MPLS link of site 1 (say MPLS A) goes down. How shall the Site 2 router B will came to know that it has to send the packets to MPLS B instead of MPLS A.