Maintaining Cluster Communication; Single Master Configurations - Tyco iSTAR Ultra Installation And Configuration Manual

Maintaining Cluster Communication

Maintaining Cluster Communication

Single Master Configurations

3–10 iSTAR Ultra Installation and Configuration Guide
Maintaining cluster communications involves establishing and maintaining connections via
the primary communication path or (optional) secondary communication path. If the primary
connection is lost, the secondary communication path is used to re-establish cluster
communications.
If a configuration with a single master loses its connection with the host, as shown in
Figure 3-7 on page 3-10:
Cluster members continue to communicate with the master.

The master continues to pass cluster members' messages to the host.

The master uses the secondary path to communicate with the host.

Example:
If the secondary path is an alternate network connection between the master and host, the
master uses the alternate network to communicate with the host.
Figure 3-7: Communication Failure with Single Master Configuration
Network Failure
Ultra Master
Host
Member
Member