Avaya Cajun P882 User Manual page 258

Chapter 7
7-4
Figure 7-2. Layout of the Redundant Backplane for P880/P882
The Avaya Multiservice switches are equipped with diagnostics to:
Monitor the status of the Primary switch controller.
Monitor the status of a Active element.
Monitoring of Health Check status messages sent between
the Active and Standby supervisors.
If the Active supervisor fails, the Standby supervisor assumes
supervisor operation. Information about a failed Supervisor (CPU)
displays in the CPU Redundancy Status Dialog Box window.
If the Primary controller fails, the redundant controller takes over
switch controller operation. When an element fails, diagnostics run
automatically to test the hardware. Information about a failed
controller or element displays in the Switch Fabric Status window in
the Web Agent. The redundant element takes over the function of
the failed element until it is replaced.
* Note: In the event that the Primary switch controller fails, the
switch will reset and record an entry of the event in the
shutdown log.
If the Active element fails, the Active and Standby
Supervisor modules can no longer communicate, or be
synchronized. No health messages will be passed.
However, the Standby Supervisor module will become
Active if the current Active Supervisor module fails.
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Chassis