Cisco Systems 78-11324-02 manual Event Correlation in VHM

Chapter 1 Voice Health Monitor Overview

Overview of VHM

VHM correlates the collected information and generates events on voice components that can be viewed in the Monitoring Console or on the Real-Time Dashboard. Users can also view device level faults in the DFM Monitoring Console. Alarms for both VHM and DFM can be seen from the Monitoring Console.

VHM and DFM share many features as well as some components of their architectures. VHM and its commonality with DFM are described in more detail in the “VHM and DFM Interdependencies” section on page 1-4 .

Event Correlation in VHM

Two types of events are generated by VHM: Compounds and Symptoms. One or more Symptoms generate Compound or aggregated events. Symptoms are faults, such as Power Supply Down or Temperature Too High, which generate Environment Exceptions. Events are generated when fault conditions are detected and the event correlation cycle is reached. The event correlation cycle in VHM occurs every 30 seconds.

An example of an event correlation in VHM is TooManyInActivePhones. This event is generated when phones registered with call managers in a cluster become inactive and cross the InActivePhoneThreshold over a number of active phones. In this event, all the call managers in the cluster are monitored to find out the total number of phones that became inactive and compare that number with the total number of active phones in the cluster.

	User Guide for Voice Health Monitor
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