Netgear WC7500 - ProSAFE® Wireless Controller 사용자 설명서

After you configure the stack, you can change profiles, security settings, and WiFi settings on 

the master controller, synchronize these changes with the slave controllers, and let the slave 
controllers push the changes to the individual access points that they manage. For ease of 
management, you can configure location-based profiles on the master controller and assign 
a location to each slave controller.

Stacking allows WiFi clients to roam from an access point that is managed by one of the 
controllers in the stacking group to any access point managed by the other controllers in the 
same stacking group.

The master and slave controllers in a stack support the following capacities:

Master controller. You can perform the following tasks:

Manage the slave controllers

Perform RF planning for the slave controllers

Configure the entire network, including access point discovery and license 
reinforcement

Monitor the entire network

Slave controller. You can perform the following tasks:

Configure the subnetwork

Monitor the subnetwork

Upgrade the firmware image on the slave controller only

Perform access point discovery for the subnetwork

Reinforce licenses for the subnetwork

A single WC9500 wireless controller that does not function in a stack 

can manage up to 300 access point; a single WC9500 wireless 
controller in a stack can manage up to 200 access points.
If a WC9500 wireless controller does not function in a stack and 
manages more than 200 access points and you add the WC9500 
wireless controller to a stack, all access points are removed from its 
managed list. The access points are removed because of the 
reduction in maximum capacity from 300 to 200 access points.
You must let the WC9500 wireless controllers in the stack rediscover 
the access points and add them to the managed lists of several 
WC9500 wireless controllers in the stack.