I actually have the opposite problem. I created a group and they need to re-authenticate each time their device goes to sleep. I want them to only authenticate once, and not have it last until their account expires. Generally I have contractors in the building for 6-8 hrs and need them to be online while they' re here.
I' m guessing the above commands are for the command line interface. I found the option for reauthenticate which is set to 5. However, I don' t see way to edit that per group. For instance, users on our student or faculty SSID, never have to reauthenticate. Seems the guest group is the only one.