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Cisco Wireless LAN Controller Configuration Guide
OL-9141-03
Chapter 1 Overview
Cisco Wireless LAN Controllers
The operator can monitor the master controller using the WCS Web User Interface and watch as access
points associate with the master controller. The operator can then verify access point configuration and
assign a primary, secondary, and tertiary controller to the access point, and reboot the access point so it
reassociates with its primary, secondary, or tertiary controller.
Note Lightweight access points without a primary, secondary, and tertiary controller assigned always search
for a master controller first upon reboot. After adding lightweight access points through the master
controller, assign primary, secondary, and tertiary controllers to each access point. Cisco recommends
that you disable the master setting on all controllers after initial configuration.
Primary, Secondary, and Tertiary Controllers
In multiple-controller networks, lightweight access points can associate with any controller on the same
subnet. To ensure that each access point associates with a particular controller, the operator can assign
primary, secondary, and tertiary controllers to the access point.
When a primed access point is added to a network, it looks for its primary, secondary, and tertiary
controllers first, then a master controller, then the least-loaded controller with available access point
ports. Refer to the “Cisco Wireless LAN Controller Failover Protection” section on page 1-16 for more
information.
Client Location
When you use Cisco WCS in your Cisco Wireless LAN Solution, controllers periodically determine
client, rogue access point, rogue access point client, radio frequency ID (RFID) tag location and store
the locations in the Cisco WCS database. For more information on location solutions, refer to the Cisco
Wireless Control System Configuration Guide and the Cisco Location Appliance Configuration Guide at
these URLs:
Cisco Wireless Control System Configuration Guide:
http://www.cisco.com/en/US/products/ps6305/products_installation_and_configuration_guides_list.ht
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Cisco Location Appliance Configuration Guide:
http://www.cisco.com/en/US/products/ps6386/products_installation_and_configuration_guides_list.ht
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