Threshold Triggers; Above Event Trigger; Figure 5 Example Without An Event - Brocade Communications Systems 8 Administrator's Manual

FIGURE 5

Threshold triggers

This section describes how Fabric Watch compares a fabric element's data value against a
threshold value to determine whether or not to trigger an event. It describes how a specified buffer
zone affects event triggering.
For Fabric Watch to monitor data values for one of the following conditions, the alarm setting must
be set to a nonzero value.

Above event trigger

Set the Above event trigger for an element that requires only high threshold monitoring. In the
Above event trigger, Fabric Watch triggers an event immediately after the data value becomes
greater than the high threshold.
Define a buffer zone within the operational limit of an area to suppress multiple events when the
counter value goes above the high threshold and fluctuates around it. The next event will not occur
until the counter value falls below the buffer zone created by the high threshold.
Above event trigger with a buffer zone. The Above event trigger occurs when the counter crosses
the high threshold (event 1 in
and buffer value, Fabric Watch triggers a second event (Event 2) to indicate that it has returned to
normal operation. The second event will not be triggered until the counter value falls below the high
threshold and buffer values.
Fabric Watch Administrator's Guide
53-1001770-01
Example without an event
Figure 6). When the data value becomes less than the high threshold
Threshold triggers
Figure 6 shows an
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