I have been setting up l2l VPNs for a customer using ASA 5505s. Recently we needed to setup a system through an ipv6 zone. The customer did not want to run dual stack on the inside so we configured ipv4 l2l with ipv6 peers on the outside. I really thought this would be a simple thing, but it has proven otherwise. Both ASAs can ping each other's ipv6 peer IP. At first I could not even get any ike traffic. The ASA reported it could not determine egress interface for outbound ipv4 traffic. It seemed that it wanted a route (or some trigger) to get the traffic into the tunnel. I added a default ipv4 route to an ipv4 address I set on the outside interface. This actually got the tunnel to come up, but I still could not ping all the way through. I cannot seem to find any examples or anything for doing ipv4 l2l over ipv6 backbone. Any help or example would be greatly appreciated.
Shelby
