Monitoring Your Network - Monitoring Alarms - Viewing an Alarm Instance's History - Using the NerveCenter Web Client -
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Using the NerveCenter Web Client

This section explains how to view the history of an alarm instance using the NerveCenter Web Client. To view this information, you go to the Web client's Alarm History page.

 
  To go to the Alarm History page:

  While on the alarm-summary page, select the Name field of the alarm instance whose history you want to see.

This field is a hypertext link, and selecting it causes the Web client to display the Alarm History page.

Alarm History



Click the thumbnail above to view full-sized image.

The Alarm History page displays the transitions that have led to the alarm instance's current state. The data displayed for each transition is similar to that displayed for an alarm instance on the alarm-summary page. The only new columns are From State, To State, and #. As you would guess, these columns hold the state of the alarm instance before the transition, the state of the instance after the transition, and the number of the transition (first, second, and so forth).

The figure above shows the history of an instance of a sample alarm, which monitors the status of a device and its SNMP agent. As you can see, the instance first transitioned from Ground to Error and then transitioned from Error to Unknown. Then, after receiving the built-in trigger ICMP_TIMEOUT several times, the instance transitioned to the Critical state DeviceDown.

There's only one action you can take from the Alarm History area. You can select the node field in the entry for any of the alarm instance's transitions to obtain information about the node associated with the alarm instance. For further information on this subject, see

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