Brocade Fabric Watch Administrator's Guide v6.2.0 (53-1001188-01, April 2009)

Fabric Watch Administrator’s Guide 25
53-1001188-01
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.