HP Brocade 8/12c Fabric Watch Administrator's Guide v6.4.0 (53-1001770-01, Jun - Page 39

Threshold triggers 2 FIGURE 5 Example without an event 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. Figure 6 shows an Above event trigger with a buffer zone. The Above event trigger occurs when the counter crosses the high threshold (event 1 in Figure 6). 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. Fabric Watch Administrator's Guide 19 53-1001770-01