Nortel Networks 2500 Series manual Working with statistics and graphs, Types of statistics

134Getting Started with Device Manager

The Edit dialog box appears for that object.

•From a switch or port shortcut menu, choose Edit. The Edit dialog box appears for that object.

When you change the value in a box, the changed value is displayed in bold. However, changes are not applied to the running configuration until you click Apply.

ATTENTION

Many dialog boxes contain a Refresh button. After you apply changes to fields, click Refresh to display the new information in the dialog box.

Working with statistics and graphs

Device Manager tracks a wide range of statistics for the 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, see "Statistics for single and multiple objects" (page 137) and to the Nortel Ethernet Routing Switch 2500 Series Performance Management — System Monitoring (NN47215-502).

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 27 "Types of statistics" (page 134) describes the types of statistics that are available.

Table 27

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.

Nortel Ethernet Routing Switch 2500 Series

Overview — System Configuration

NN47215-500 (323162-B) 02.02 Standard

4.1 19 November 2007

Copyright © 2007, Nortel Networks