Nortel Networks 608(WL) - Manual (Page 115)

Chapter 4
Configuration via the Command Line Interface
E-DOC-CTC-20051017-0169 v0.1 113
IKE SA lifetime
[lifetime_secs]
The lifetime of a Security Association is specified in seconds:
Lifetime measured in: Minimum value Maximum value
seconds 240 (=4 minutes) 31536000 (=1 year)