Brocade Fabric Watch Administrator's Guide Supporting Fabric OS v6.0.0 (53-1000601-01, October 2007)

Fabric Watch Administrator’s Guide 17
53-1000601-01
Configuring events
1
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 8 illustrates event notification using an In-Between event trigger. The arrow marked with one
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
An alarm is generated
• OUT_OF_RANGE to IN_RANGE
An alarm is generated
No alarm is generated for INFORMATIVE to IN_RANGE (or IN_RANGE to INFORMATIVE)
See Appendix , “Default Threshold Values” for more details about the threshold states for Above,
Below, and Changed.