iSTAR Edge G2 Controller Installation and Configuration Guide 28
Communications Path
The master controller connects to the host over a primary communication path.
Primary Communications Path
The primary path is the first communication path that clusters use to establish communications with the host. The master is
the only controller in a cluster that passes messages between the host and cluster members. Cluster members do not
communicate with the host directly; they communicate with the host through the master. Connections are established in the
following bottom-to-top order:
• Cluster members are responsible for establishing connections with the master.
• The master is responsible for establishing a connection with the host.
Primary Communication Path on Page 28 shows the primary path for cluster member A and the master/host connection type is
a network.
Figure 5:Primary Communication Path
Primary Communications Guidelines
Follow these guidelines when configuring a primary path:
• Every cluster must have a master.
• Only one master is allowed per cluster.
• If a cluster contains only one controller, that controller is the master.
• Any controller in a cluster can be designated as the master.
Planning Primary Communications
Configuring a primary communication path involved:
• Specifiying a master for the cluster.
• Specifying a communication method between the master and the C•CURE host.
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