Chapter 11 IPsec VPN for FortiOS 5.0 : IPv6 Configuration : IPv6 IPsec VPN : Site-to-site IPv6 over IPv6 VPN example : Configure FortiGate A routing
  
Configure FortiGate A routing
This simple example requires just two static routes. Traffic to the protected network behind FortiGate B is routed via the virtual IPsec interface toB. A default route sends all IPv6 traffic out on port2.
config router static6
edit 1
set device port2
set dst 0::/0
next
edit 2
set device toB
set dst fec0:0000:0000:0004::/64
end