Netgear WC7600 Reference Manual - Page 241

ProSAFE Wireless Controller WC7600 Setting VRRP ID [1-255] Local IP Description For the primary controller, enter a number from 1 through 255 as the VRRP ID. For the primary controller, enter a local IP address. If a failover occurs, this IP address remains assigned to the primary controller and does not transfer to the redundant controller to let you identify the primary controller before and after the failover. WARNING: Enabling redundancy causes the wireless controller to reboot, which might temporarily affect traffic on the managed access points in the network. 7. Click the Apply button. 8. Select Monitor > Network. The Network monitoring screens displays. 9. Click the Refresh button. The Network monitoring screen displays redundancy information. Manage a Redundancy Group with N:1 Redundancy The wireless controller supports N:1 redundancy with failover . Redundancy is implemented through the use of the Virtual Router Redundancy Protocol (VRRP). VRRP N:1 Redundancy Concepts With N:1 redundancy, you can add one redundant controller for up to three controllers, that is, a redundancy group can consist of four controllers, one of which is a redundant controller. In an N:1 redundancy group with three primary controllers and one redundant controller, you could consider the redundant controller to consist of three virtual controllers, each of which has a redundancy relationship with a primary controller. You need a unique VRRP ID for each relationship. Each controller in the redundancy group has a unique controller IP address and a unique local IP address. Local addresses remain constant so a controller can always be identified before and after a failover. If the primary controller fails or is disconnected from the network, an automatic failover to the redundant controller occurs. The redundant controller then takes ownership of the controller IP address of the primary controller and takes over all functions of the primary controller. After a failover has occurred, there is no longer any redundancy available for the other primary controllers in the redundancy group. Manage Stacking and Redundancy 241