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ASA Dual ISPs for IPsec Tunnels with Dead Peer Detection configuration


We have more than 50 branch offices (IPsec Tunnels) terminated in ASA for VPN.

Now we are trying to have dual ISP for internet connection high availability.

Red Line is for VPN connection, in other words, F5 doesn't affect any VPN connection because ASA is connected directly to L2 switch through ISP routers.       


When I read the CCNP VPN, it has "Dead Peer Detection" feature which I can setup one more VPN termination point for each branch office. However, what I like to do is opposite because branch office doesn't have dual ISP. This is what I like to do.  When IPS 1 link is down from above diagram, Users in branch offices can communicate through another redundant IPsec tunnel through ISP2. We have cisco 881 and netgear routers in each branch office. I believe that I have to

1. setup dual IPsec tunnels at each router at branch offices (Cisco 881 and Netgear router)

2. there is no additional setup needed in ASA itself.



   ASA at Data Center (example of Dead Peer Detection setup: which we don't use for this senario)