Brocade Fabric Watch Administrator's Guide v6.1.0 (53-1000601-02, June 2008)

Fabric Watch Administrator’s Guide 15
53-1000601-02
Event Configuration
1
DRAFT: BROCADE CONFIDENTIAL
The following examples illustrate each point.
Example1: Triggering an event
Figure 4 shows a sample graph of data obtained by Fabric Watch (the type of data is irrelevant to
the example). A high threshold of 2 is specified to trigger an event. A time base of minute is
defined. An event occurs only if the rate of change in the specific interval (one minute in this
example) is across the threshold boundary. It should be either higher than the high threshold limit
or lower than the low threshold limit.
As illustrated on the tenth sample, the counter value changes from 0 to 1; hence calculated rate of
change is 1 per minute. At the thirteenth sample, the rate of change is 2 per minute. The rate of
change must be at least 3 per minute to exceed the event-triggering requirement of 2, which is met
on the eighteenth sample.
FIGURE 4 Event trigger
Example 2: Not triggering an event
Figure 5 uses the same data to illustrate a case in which a threshold is exceeded without triggering
an event. In this case, the calculated rate of change in the data value is always less than or equal to
the high threshold of 2.