I have a new WLC526 installed at a site that seems to hang after about 8 hours of use. I can ping everything else on the network, except for the controller management address. I can also log in the controller via console and do everything except pass traffic across the interface. The controllers management and ap-management IP's are on the same VLAN (default 1) and the wireless users are on VLAN 10 - Usernet.
The controller is connected to a CE520 switch, and using a 1811 router for the gateway.