Enterasys Networks 6000 - Manual (Page 163)

Alarm Configuration
4-28 How Rising and Falling Thresholds Work
will be generated until the opposite threshold is met or crossed. Therefore, if your
threshold pair spans a wide range of values, and network performance is unstable around
either threshold, you will only receive one event in response to what may be several
dramatic changes in value. To monitor both ends of a wide range of values, set up two
pairs of thresholds: one set at the top end of the range, and one at the bottom.
Figure 4-7
illustrates such a configuration.
Figure 4-7. Sample Rising and Falling Threshold Pairs
TIP
The current version of the Basic Alarms window only allows you to configure a single pair
of thresholds for each alarm variable on each interface; be sure to keep this hysteresis
function in mind when configuring those threshold values.