How do you configure a secondary IPSEC L2L tunnel without using GRE tunnels on Cisco routers? Is this even possible with the use of crypto ACL's? Example specifics below:
Three routers (All Cisco); a Primary VPN Head-end, a secondary VPN Head-end, and a VPN remote. The remote has two tunnels built to each head-end router. It uses the primary tunnel to reach the 10.0.0.0/8 range but will use the secondary to reach this same range in the event the Primary Head-End fails.