Adding Controllers to the Cluster
iSTAR Ultra Installation and Configuration Guide 3–11
Adding Controllers to the Cluster
Follow these guidelines when adding controllers to a cluster.
 A controller must be assigned to a cluster before the controller can communicate with the 
host, master, or other controllers. 
Use the Cluster window in the C•CURE System Administration Application to add 
controllers to a cluster. When added to a cluster, the controller becomes a cluster member.
 One controller can comprise a cluster. You can configure a controller as its own cluster by 
configuring a cluster that includes only the controller and specifying that controller as the 
master. 
 A cluster member communicates with other cluster members through the master. 
 A cluster communicates with the C•CURE host via the cluster’s primary or secondary 
path. 
 A cluster communicates with other clusters and with apC panels via the C•CURE host. 
 A cluster can communicate with the C•CURE server across a WAN. You can configure 
clusters that are spread across WAN topologies.