Chapter 11 IPsec VPN for FortiOS 5.0 : IPv6 Configuration : IPv6 IPsec VPN : Configuring IPv6 IPsec VPNs : Phase 2 configuration
  
Phase 2 configuration
To create an IPv6 IPsec phase 2 configuration in the web-based manager, you need to define IPv6 selectors in the Advanced settings. Change the default “0.0.0.0/0” address for Source address and Destination address to the IPv6 value “::/0”. If needed, enter specific IPv6 addresses, address ranges or subnet addresses in these fields.
In the CLI, set src‑addr‑type and dst‑addr‑type to ip6, range6 or subnet6 to specify IPv6 selectors. By default, zero selectors are entered, “::/0” for the subnet6 address type, for example. The simplest IPv6 phase 2 configuration looks like this:
config vpn ipsec phase2-interface
edit tunnel6_p2
set phase1name tunnel6
set proposal 3des-md5
set src-addr-type subnet6
set dst-addr-type subnet6
end