Users Guide

Command Description
show cluster-switches
When you issue this command from the cluster root, the output of this
command displays the IP address of the VLAN the cluster member uses
to connect to the cluster root.
If you issue this command from a cluster member, the output of this
command displays the IP address of the VLAN the cluster root uses to
connect to the cluster member.
show cluster-config
When you issue this command from the cluster root, the output of this
command shows the cluster role of the controller, and the IP address of
each active member controller in the cluster.
When you issue this command from a cluster member, the output of this
command shows the cluster role of the controller, and the IP address of
the cluster root.
Table 18: CLI Commands to Display Cluster Settings
Configuring Networks with a Backup Master Controller
If your network includes a redundant backup master controller, you must synchronize the database from the
primary master to the backup master at least once after all APs are communicating with their controllers over a
secure channel. This ensures that all certificates, IPsec keys, and campus AP whitelist entries are synchronized
to the backup controller. You should also synchronize the database any time the campus AP whitelist changes
(APs are added or removed to ensure that the backup controller has the latest settings).
Master and backup controllers can be synchronized using either of the following methods:
l Manual Synchronization: Issue the database synchronize command in enable mode to manually
synchronize databases from your primary controller to the backup controller.
l Automatic Synchronization: Schedule automatic database backups using the database synchronize
period command in configuration mode.
If you add a new backup controller to an existing controller, you must add the backup controller as the lower priority
controller. If you do not add the backup controller as a lower priority controller, your control plane security keys and
certificates may be lost. If you want the new backup controller to become your primary controller, increase the
priority of that controller to a primary controller after you have synchronized your data.
Replacing a Controller on a Multi-Controller Network
The procedure to replace a controller within a multi-controller network varies, depending upon the role of that
controller, whether the network has a single master controller or a cluster of master controllers, and whether or
not the controller has a backup.
The following sections describe the steps to replace an existing controller. To add a new local controller to a network,
or to permanently remove a local controller without replacing it, see Viewing the Master or Local Controller
Whitelists on page 63.
Replacing Controllers in a Single Master Network
Use the procedures in this section to replace a master or local controller in a network environment with a single
master controller.
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