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Alarm Configuration
The top portion of the window contains the device information boxes, as well as the event index number and the event description; the log itself includes the following Þelds:
Index | This index number is not the eventÕs index, but a separate |
| index that uniquely identiÞes this occurrence of the |
| event. |
Time | Indicates the date and time of each event occurrence. |
Description | Provides a detailed description of the alarm that |
| triggered the event: whether it was a rising or falling |
| alarm, the alarm index number, the alarm variable name |
| and object identiÞer (OID), the alarmSampleType |
| (1=absolute value; 2=delta value), the value that |
| triggered the alarm, the conÞgured threshold that was |
| crossed, and the event description. Use the scroll bar at |
| the bottom of the log to view all the information |
| provided. |
Each log will hold only a Þnite number of entries, which is determined by the resources available on the device; when the log is full, the oldest entries will be replaced by new ones.
How Rising and Falling Thresholds Work
Rising and falling thresholds are intended to be used in pairs, and can be used to provide notiÞcation of spikes or drops in a monitored value Ñ either of which can indicate a network problem. To make the best use of this powerful feature, however, pairs of thresholds should not be set too far apart, or the alarm notiÞcation process may be defeated: a
How Rising and Falling Thresholds Work |