When there is a master controller enabled, all newly added access points with no primary, secondary, or tertiary controllers assigned associate with the master controller on the same subnet. This allows the operator to verify the access point configuration and assign primary, secondary, and tertiary controllers to the access point using the All APs > Details page.
The master controller is normally used only when adding new access points to the Cisco Wireless LAN solution. When no more access points are being added to the network, Cisco WLAN solution recommends that you disable the master controller.
