Chapter 11 IPsec VPN for FortiOS 5.0 : IPv6 Configuration : RIPng — RIP and IPv6 : Configuring other network devices
  
Configuring other network devices
The other devices on the internal network all support IPv6, and are running RIPng where applicable. They only need to know the internal interface network addresses of the FortiGate units.
The ISP routers need to know the FortiGate unit information such as IPv6 addresses.