I'm only lightly familiar with the ASA, so I don't know if this is even possible. Here's what we'd like to do:
We have some mobile laptops with Sprint cards as well as wifi cards. These laptops would have a Cisco VPN client installed. We want them to be able to use the VPN when their in Sprint coverage areas, but they also need to be able to use it when they pull into certain wifi hotspots we have created for them throughout our city.
Their IP address will change when the switch networks, so I'm sure that would break the VPN. One option is to have the user disconnect and reconnect every time they move in and out of these zones, but we'd rather find a way for it to happen dynamically. These are emergency service workers and they have enough on their minds without having to deal with our VPN issues. We want to make it transparent to them, if possible.
Is there a way to make the tunnel dynamically reconnect every time the laptop grabs a new IP address?