Owner's Manual

822 Events, Rules and Actions
- Threshold Count —The number of events that must occur during the period selected in the
previous field before the rule is active.
-
Action —Select Reject or Suppress .
-
Publish Events —Check to publish clearing or suppressed events even if the rule was not
successful. When you publish an event, subscribers are notified.
Event Filter Criteria on page 818 describes how you can select the correlated event(s)
State Flutter
This Pattern Detection correlation detects a rapidly re-occurring condition like linkDown/linkUp
traps from a flapping link.
Figure 34-7. State Flutter
The Rule Properties portion of the screen lets you specify a Name and Description for the
correlation pattern, and a checkbox to enable / disable correlation events. The
Event Filter portion
of the screen lets you create a filter to find which events will activate the filter. See Chapter 28,
Filters for more information about these.
Finally, the
Options portion of this screen lets you specify the filter Duration (seconds ), the Action
to perform on correlated events (
Reject / Suppress ). Reject ignores the event entirely and it does
not appear in either Event History or the Alarm viewer.
Suppress does not display the event in the
Alarm viewer, but the event does appear in Event History.
The state flutter filter lets the trigger event pass through without modification, but suppresses or
rejects any subsequent events that would change the initial alarm state from the trigger event. It
does this until no correlated events appear for the duration specified. Flutter detection always
retains the last event until the filter expires. Then it passes the final event as is if it does not match