HP StorageWorks 4/16 Brocade Fabric Watch Administrator's Guide v6.2.0 (53-100 - Page 47
In-between event triggers, Fabric Watch alarm behavior
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Threshold event settings 4 In-between event triggers Fabric Watch event triggers are usually set to notify the user of a warning or failure condition, but there is an exception. You can define the In-Between event trigger to receive a notification of fault recovery. For example, when measuring port performance, crossing the high threshold triggers an Above threshold event, which displays a warning message. The threshold might be crossed for a period so brief that is not a true cause for an alarm. An In-Between event trigger indicates that the port performance has returned to the acceptable range. Use the In-Between event trigger to: • Verify a successful recovery from a faulty condition. • Reset the counter value for the next event. • Identify an element that is consistently operating under marginal conditions. Figure 8 illustrates event notification using an In-Between event trigger. The arrow labeled 1 indicates the point at which event notification occurs. FIGURE 8 In-between event trigger Fabric Watch alarm behavior Fabric Watch alarm behavior depends on the threshold states associated with the Above, Below and Changed thresholds. Threshold states can be INFORMATIVE, IN_RANGE, and OUT_OF_RANGE. Alarms are generated only for the following transitions: • IN_RANGE to OUT_OF_RANGE • OUT_OF_RANGE to IN_RANGE No alarm is generated for INFORMATIVE to IN_RANGE (or IN_RANGE to INFORMATIVE) See "Class default settings" on page 39 for more details about the threshold states for Above, Below, and Changed triggers. Fabric Watch Administrator's Guide 25 53-1001188-01