Avaya Business Policy Switch 2000 Management Software Operations Software Version 2.0 Manual de usuario descargar pdf (Pagina 219)

Chapter 10 RMON 219

Reference for the Business Policy Switch 2000 Management Software Operations

Alarms

Alarms are useful when you need to know when the values of a variable go out of

range. You can define an RMON alarm for any MIB variable that resolves to an

integer value. You cannot use string variables (such as system description) as

alarm variables.

All alarms share the following characteristics:

• An upper and lower threshold value is defined.

• A corresponding rising and falling event occurs.

• An alarm interval or polling period is reached.

When alarms are activated, you can view the activity in a log or a trap log, or you

can create a script to notify you by beeping a console, sending e-mail, or calling a

pager.

How RMON alarms work

The alarm variable is polled and the result is compared against upper and lower

limit values you select when you create the alarm. If either limit is reached or

crossed during the polling period, then the alarm fires and generates an event that

you can view in the event log or the trap log.

The alarm’s upper limit is called the rising value, and its lower limit is called the

falling value. RMON periodically samples the data based upon the alarm interval.

During the first interval that the data passes above the rising value, the alarm fires

as a rising event. During the first interval that the data drops below the falling

value, the alarm fires as a falling event (Figure 118).

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Avaya Business Policy Switch 2000 Management Software Operations Software Version 2.0 Manual de usuario Pagina 219