HP StorageWorks 2/16V Brocade Fabric Watch Administrator's Guide (53-1000243-0 - Page 34

1 Configuring Events Above Event Triggers Use 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 1-6 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 1-6). 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. Figure 1-6 Above Event Trigger with Buffer Zone Below Event Trigger The Below event trigger generates an event when a data value becomes less than the low threshold boundary. When a buffer is defined, the event will be triggered when the value goes below the lower threshold. A second event will not be generated until the value crosses the buffer region set above the lower threshold. Changed Event Trigger Use the Changed event trigger for an element that requires "rate of change" monitoring. When Fabric Watch detects a change in the counter value between two sample periods (defined by the time base), it triggers an event regardless of high or low threshold settings. Figure 1-7 shows events generated when the data value changes. Each arrow in the figure indicates a generated event. 1-18 Fabric Watch Administrator's Guide Publication Number: 53-1000243-01