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Chapter 1
7 Avaya C360 SMON User Guide
Alarms and Events Overview
The Alarms and Events tool reports when a specified counter on selected
ports, or on a device, cross user defined thresholds. The Alarm Wizard
provides a simple method for defining upper and lower thresholds of a
counter on selected ports or on the device. This definition of the
thresholds is an Alarm.
An Event is the crossing of a defined threshold in the direction it was
defined. For example, a Rising Event is when the rate of a specified
counter on a selected port rises above the defined Rising (upper)
Threshold. A Falling Event is when the rate of a specified counter on a
selected port falls below the defined Falling (lower) Threshold.
The following figure shows the scheme used to generate Events.
Figure 1-1. Events Overview
The first Event is a Rising Event, caused by the counter rate rising above
the Rising Threshold. The second Event is a Falling Event, caused by the
counter rate falling below the Falling Threshold. The third Event is a
Rising Event. Note, that although the rate falls below the Rising Threshold
and then rises above it again, no Event is generated. A new Rising Event
can only be generated after the rate falls below the Falling Threshold.
Similarly, after the fourth Event, although the rate rises above the Falling
Threshold and then falls below it again, no Event is generated. A new
Falling Event can only be generated after the rate rises above the Rising
Threshold.
If you want to be informed of the rise or fall of the rate of a particular type
of packet on a port, you could use the Alarm Wizard to define thresholds
for the packet type on the port. You could then specify whether an Event
causes a trap to be sent to the device’s manager, or is listed in SMON’s
Device Event Log, or both.
Counter
Rate
Rising Threshold
Falling Threshold
Time
u
- Rising Event
- Falling Event