MSM 720 v6.3 LAN Ports Lockup

[MS_Vio]

We experienced occasional LAN ports lock up on few of our MSM 720s running 6.3.  ALL APs loose connection to the the controller. Rebooting clears the problem.  Anybody has experienced similar problem?

Thank you.

[Lion-Heart]

if you setup runs STP , Try disabling STP on the ports which Controller connects or set it as ST edge port

[MS_Vio]

Thank you so much.  I could not find the setting for port STP on the Web Admin GUI.  Please note these are not Mobility Controllers they are Access Controllers.