Reference Manual

Manage Stacking and Redundancy
282
ProSAFE Wireless Controller WC9500
WARNING:
Enabling redundancy causes the wireless controller to reboot,
which might temporarily affect traffic on the managed access
points in the network.
9. Click the Apply button.
The changes are saved.
10. Select Monitor > Network.
The Network monitoring screens displays.
11. 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).
For information about 1:1 redundancy, see Manage Redundancy for a Single Controller on
page 278.
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
maintains a redundancy relationship with a primary controller. You need a unique VRRP ID
for each relationship.
Each controller in the redundancy group is assigned a unique controller IP address and a
unique local IP address. Local addresses remain constant so that 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
VRRP ID [1-255] For the primary controller, enter a number from 1 through 255 as the VRRP ID.
Local IP
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.
Setting Description