Netgear WC7500-Wireless User Manual - Page 300

ProSAFE Wireless Controller The following figure shows an N:1 configuration with three primary controllers and one redundant controller after a failover occurs: Figure 24. Primary and redundant controllers in an N:1 configuration after a failover Configure a Redundancy Group With N:1 Redundancy To enable N:1 redundancy, configure the redundancy settings on the primary controllers (the master and one or two slaves) and on the redundant controller (the secondary controller) that serves all primary controllers. All controllers require matching licenses. If licenses do not match, redundancy cannot be established. For additional requirements, see Requirements and Restrictions for N:1 Redundancy on page 298. An N:1 redundancy group includes two or three primary controllers that usually operate as a stack: • To configure redundancy for a stack of two controllers, you need three controllers: Two primary controllers (one master and one slave) and one redundant controller that serves both primary controllers. • To configure redundancy for a stack of three controllers, you need four controllers: Three primary controllers (one master and two slaves) and one redundant controller that serves the three primary controllers. For information about configuring a stack of controllers, see Configure a Stack of Wireless Controllers on page 283. Manage Stacking and Redundancy 300