Nortel Networks 380-24F Working with statistics and graphs, Types of statistics, Types of graphs

Chapter 3 Device Manager basics 53

Working with statistics and graphs

Device Manager collects a wide range of statistics for each switch and each port. You can view and graph statistics for a single object or multiple objects. For information about the statistics tracked for the switch and ports, refer to Using the BayStack 380-24F Gigabit Switch.

This section describes the types of statistics and graphs available, the graph dialog boxes, and the procedure for creating a graph.

Types of statistics

The data tables in the statistics dialog boxes list the counters, or categories of statistics being gathered, for the specified object. For example, the categories for ports include Interface, Ethernet Errors, Bridge, and Rmon. Each category can be associated with six types of statistics (Table 11).

Table 11 Types of statistics

Statistic	Description
AbsoluteValue	The total count since the last time counters were reset. A system
	reboot resets all counters.
Cumulative	The total count since the statistics window was first opened. The
	elapsed time for the cumulative counter is displayed at the bottom of
	the graph window.
Average	The cumulative count divided by the cumulative elapsed time.
Minimum	The minimum average for the counter for a given polling interval over
	the cumulative elapsed time.
Maximum	The maximum average for the counter for a given polling interval over
	the cumulative elapsed time.
LastValue	The average for the counter over the last polling interval.

Types of graphs

With Device Manager, you can create line, area, bar, and pie graphs. Figure 27, Figure 28, Figure 29, and Figure 30 illustrate the different graph styles, respectively.

Getting Started with the BayStack 380-24F Gigabit Switch Management Software