We use the Ciso WISM solution and have a wism ctlr (126.96.36.199) with 57 AP's. During the day we have +/-650 users on this ctrl. (the other has 81 AP;'s and +/-500 users)
Most users are concentrated in classrooms.
In the snmp trap logs we see concentrated in time during the day a lot (+/- 150) of 'AAA Authentication Failure for UserName:xxxxxx User Type: WLAN USER' messages.
There are complains from the users about maintaining the wireless connection.
Also there's sometimes in this busy period a swap from the primary radius srv (Radiator) to the secondary.
Is there a best practice for this? In the 'off hours' everything works fine.