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Ethernet Statistics
ROS™ v3.5 126 RS400
Figure 87: The Alarm Process
There are two methods to evaluate a statistic in order to determine when to generate an event;
these are the delta and absolute methods.
For most statistics (such as line errors) it is appropriate to alarm when a rate is exceeded. The
alarm record defaults to the “delta” measurement method, which examines changes in a statistic
at the end of each measurement period.
It may be desirable to alarm when the total, or absolute, number of events crosses a threshold.
In this case, set the measurement period type to “absolute”.
Figure 88: RMON Alarms Table