31 
Key Renewal Timeout 
Specify the value of Group Key Renewal. It is a value from 600 
to 36000, and default is 3600. 
WPA automatically changes secret keys after a certain period of 
time. The group key interval is the period of time in between 
automatic changes of the group key, which all devices on the 
network share.  
Constantly keying the group key protects your network against 
intrusion, as the would-be intruder must cope with an ever-
changing secret key.