I'm running a lab with GNS3 which is composed of 2 ASA's (8.4.2) and one host behind each ASA.
In this lab I want to set up a Lan-to-Lan VPN with both peer in IPv6, and internal networks still IPv4. (both peers are in dual-stack)
According to the Cisco documentation it should works :
"Specifically, the following topologies are supported when both peers are Cisco ASA 5500 series adaptive security appliances: [...]
The adaptive security appliances have IPv6 inside networks and the outside network is IPv4 (IPv6 addresses on the inside interface and IPv4 addresses on the outside interfaces)."
Here is a sample schema of the lab :
Note that I can ping both peers in IPv6 (ping fc00::2 from fc00::3 and vice-versa).
For the L2L configuration :
When I set the IPv4 address of the peer, everything works fine (both host can ping each others)
When i set the IPv6 address of the peer, the tunnel is up(there is traffic according to the VPN stats) but there is no "trace" of the traffic on the other side.
For example :
When I ping 10.1.2.2 from 10.1.1.2, I can see traffic in the tunnel (VPN stats in asdm), but the host 10.1.2.2 doesn't receive any echo request. ASA (with 10.1.1.1) doesn't see any traffic too.
Any help would be appreciated,