To improve the availability of your plugin role, you can add a secondary server on standby. If the primary server hosting the role becomes unavailable, the role is automatically transferred to the secondary server.
Before you begin
- Ensure that you have an expansion server available. If you do not have an expansion server available, add an expansion server to your system.
-
If your plugin role is hosted on the
main server, move it
to an expansion server.
NOTE: If you must host the plugin role on the main server, you must also configure the Directory failover. For more information, see Directory failover and load balancing.
- Ensure that the plugin role and the plugin role database are not hosted on the same server. For more information, see Connecting roles to remote database servers.
What you should know
IMPORTANT: Security Center does not handle the failover of
role databases. For roles that connect to a database, the database server must be
hosted on a third computer, separate from the servers hosting the role. All role
servers must have read and write access to the database server. To protect your
data, perform regular backups of the role database.
Procedure
-
Under the Servers list, click Add an item
(
).
A dialog box opens, listing all remaining servers on your system that are not yet assigned to this role. -
Select the server that you want to add as a secondary server and click
Add.
The secondary server is added below the primary server. The green LED indicates which server is hosting the role.NOTE: The servers are listed in the order that they are picked if a failover occurs. When the primary server fails, the role automatically switches to the next server on the list.
-
To change the priority of a server, select it from the list, and click the
or 
buttons to move it up or
down the list.