Chapter 11 IPsec VPN for FortiOS 5.0 : IPv6 Configuration : IPv6 IPsec VPN
  
IPv6 IPsec VPN
This chapter describes how to configure your FortiGate unit’s IPv6 IPsec VPN functionality. The following topics are included in this section:
Overview of IPv6 IPsec support
Configuring IPv6 IPsec VPNs
Site-to-site IPv6 over IPv6 VPN example
Site-to-site IPv4 over IPv6 VPN example
Site-to-site IPv6 over IPv4 VPN example