Tyco iSTAR eX, Installation And Configuration Manual

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Maintaining Cluster Communication
2–12 iSTAR eX Installation and Configuration Guide
Alternate Master Configuration
If the master loses its network connection with the host, or if the master
hardware fails, a secondary path can connect an alternate master and the host
(Figure 2.8).
The following describes the sequence of events:
„
The alternate master establishes a connection with the host via the
secondary path.
„
Cluster members establish connections with the alternate master via the
network.
„
The alternate master sends the cluster members’ messages to the host, and
also sends messages from member to member.
Figure 2.8: Communication Failure with Alternate Master Configuration
Host
Master
Primary Path
Failure
Cluster member
Alternate
Master
Network