Specifications

UTT Technologies Chapter 12 VPN
http://www.uttglobal.com Page 235
Figure 12-26 IPSec Settings (AutoKey (IKE) – Advanced Options (Aggressive Mode)
Advanced Options: Click this hyperlink to view and configure advanced parameters.
In most cases, you need not configure them.
Exchange Mode: It specifies the exchange mode used for IKE phase 1 negotiation.
The available options are Main and Aggressive. If the Connection Type is
Bidirectional, you should choose Main mode; else, you should choose Aggressive
mode.
SA Lifetime (Phase 1): It refers to IKE SA lifetime, which specifies the number of
seconds (at least 600 seconds) an IKE SA will exist before expiring. A new IKE SA is
negotiated 60 seconds before the existing IKE SA expires.