Tyco iSTAR eX, Installation And Configuration Manual

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Single Master and Alternate Master Configurations
iSTAR eX Installation and Configuration Guide 2–9
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.
Cluster members are connected to the master only via a 10/100Base-T
network connection.
Figure 2.5 shows the primary path for cluster member A.
Figure 2.5: The Primary Path
Host
Hub
1
4
3
2
Master
Cluster
Member B
Ethernet
Network
Cluster
Member A