Dell Brocade 5100 User's Guide download pdf (Page 35)

Fabric Watch Administrator’s Guide 15

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Threshold triggers

Above event trigger

Set the Above event trigger for an element that requires only high threshold monitoring. In the

Above event trigger, Fabric Watch triggers an event immediately after the data value becomes

greater than the high threshold.

Define a buffer zone within the operational limit of an area to suppress multiple events when the

counter value goes above the high threshold and fluctuates around it. The next event will not occur

until the counter value falls below the buffer zone created by the high threshold. Figure 2 shows an

Above event trigger with a buffer zone. The Above event trigger occurs when the counter crosses

the high threshold (event 1 in Figure 2). When the data value becomes less than the high threshold

and buffer value, Fabric Watch triggers a second event (Event 2) to indicate that it has returned to

normal operation. The second event will not be triggered until the counter value falls below the high

threshold and buffer values.

FIGURE 2 Above event trigger with buffer zone

Below event trigger

The Below event trigger generates an event when a data value becomes less than the low

threshold boundary.

When a buffer is defined, the event will be triggered only when the value goes below the lower

threshold. A second event will not be generated until the value crosses the buffer region set above

the lower threshold.

Audit and RASlog messages

Fabric Watch generates an Audit message along with a RASlog message when the current

threshold exceeds the high threshold limit configured for the following thresholds:

• SCSI reservation

• Class 3 discards (C3TXT0)

• Switch memory usage

• Switch flash usage

• Switch CPU usage

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Dell Brocade 5100 User's Guide Page 35