we have some ASA and PIX devices connected to an IOS Router in our main datacenter using IPSec L2L tunnels.
Is it possible to create a "backup tunnel" between such an PIX/ASA and an other IOS Router in our backup datacenter ?
We would like the traffic to use the main tunnel if it is up, but to automatically switch to the "backup tunnel" in case the primary one fails. Main and backup IOS Router are located in the same LAN and are talking OSPF. I know it is possible to add multiple peers to a crypto map on the ASA, but I don't know how to route this on the datacenter routers.