Brocade Fabric Watch Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 26)

FIGURE 1 In-between buffer values
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. The figure below
shows an Above event trigger with a buffer zone. The Above event trigger occurs when the counter
crosses the high threshold (event 1 in the figure below). When the data value becomes less than the
high threshold 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.
Threshold triggers
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