Chapter 11 IPsec VPN for FortiOS 5.0 : Hardware offloading and acceleration : IPsec offloading configuration examples
  
IPsec offloading configuration examples
The following examples configure two FortiASIC NPx network processor accelerated VPNs, one route‑based, the other policy based. In both cases, the network topology is as shown in Figure 284.
Figure 284: Hardware accelerated IPsec VPN topology