We have a number of sites where we have Cisco 21006 Wireless Controllers and a number of 1131 LAP's attached to them.
The units are located on the same physical LAN segment as the WAP's and they are connected directly to the controller.
Over the past three weeks we have had a number of controllers fail by locking up and constantly rebooting.
When on the console of the WLC before it reboots there is an error message that says "Watchdog process has intiated reaper as process cannot be contacted." then the next message starts "Reaper cleanup started..." and the unit reboots.
No configuration changes have taken place on the WLC's over the past few weeks and no additional kit hsa been installed.