Why are wireless clients are required to re-authenticate often?

Question

I have a ZD1100 and six 7962 access points.  We use the web portal authentication method.  I have the grace period set to 20160 minutes and inactivity timeout set to 500 minutes.  Sometimes (but not always) when a user roams to a different AP, they lose their network connection and need to re-authenticate.  This problem started after upgrading the firmware from 9.1 to 9.5 and it's still an issue on 9.6.  I had a support case open on this but we never got it working.  I'm about to stop using this feature completely.  Any other ideas?

robert_11 · Answer

I turned off channel fly and the problem went away.

robert_11 · Answer

This also happens when a user is just sitting at their desk so it's happening even when they aren't roaming to a different AP.  I noticed this in the log right before the user was forced to re-authenticate:

The Channelfly AP[RuckusAP-EB] detects interference on radio [11a/n] and switches from channel [157] to channel [149].

The user was using 11a/n so maybe Channelfly is causing issues?

robert_11 · Answer

I wonder if it's related to this issue https://forums.ruckuswireless.com/ruc...