Brocade Fabric Watch Administrator's Guide (53-1000243-01, November 2006)

Fabric Watch Administrator’s Guide 1-19
Publication Number: 53-1000243-01
Configuring Events
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Figure 1-7 Changed Threshold
Use Changed event triggers with discretion. They are most useful when a change in value is expected to
be rare. Monitoring a fabric element that is subject to frequent change generates so many events that it
can render it virtually useless. For example, this trigger type is appropriate for FRU failures. It is not
appropriate for temperature monitoring.
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 condition.
Figure 1-8 illustrates event notification using an In-Between event trigger. The arrow marked with one
indicates the point at which event notification occurs.
Figure 1-8 In-Between Event Trigger