Chapter 11 IPsec VPN for FortiOS 5.0 : Phase 2 parameters : Basic phase 2 settings
  
Basic phase 2 settings
After IPsec VPN phase 1 negotiations complete successfully, phase 2 negotiation begins. Phase 2 parameters define the algorithms that the FortiGate unit can use to encrypt and transfer data for the remainder of the session. The basic phase 2 settings associate IPsec phase 2 parameters with a phase 1 configuration.
When defining phase 2 parameters, you can choose any set of phase 1 parameters to set up a secure connection and authenticate the remote peer.
For more information on phase 2 settings in the web-based manager, see “Phase 2 configuration”