I am trying to wrap my head around designing a MPLS network with a DMVPN/mGRE failover solution however it seems im running into a routing issue once I shut down the MPLS interface to test failover. As seen in the topology each branch peers to the te...

When attempting to bring the tunnel up w/ packet tracer the packets are being dropped by an implicit rule.. Is there a need for another ACL that would permit this traffic over the tunnel? Please see the relevant configurations below.. Thank you for a...