134 Getting Started with Device ManagerThe Edit dialog box appears for that object.• From a switch or port shortcut menu, choose Edit. The Edit dialogbox appears for that object.When you change the value in a box, the changed value is displayed inbold. However, changes are not applied to the running configuration untilyou click Apply.ATTENTIONMany 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 graphsDevice Manager tracks a wide range of statistics for the switch and eachport. 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 NortelEthernet Routing Switch 2500 Series Performance Management — SystemMonitoring (NN47215-502).This section describes the types of statistics and graphs available, the graphdialog boxes, and the procedure for creating a graph.Types of statisticsThe data tables in the statistics dialog boxes list the counters, or categoriesof statistics being gathered, for the specified object. For example, thecategories 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 statisticsthat are available.Table 27Types of statisticsStatistic DescriptionAbsoluteValue The total count since the last time counters were reset. Asystem 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 thebottom of the graph window.Average The cumulative count divided by the cumulative elapsed time.Minimum The minimum average for the counter for a given pollinginterval over the cumulative elapsed time.Nortel Ethernet Routing Switch 2500 SeriesOverview — System ConfigurationNN47215-500 (323162-B) 02.02 Standard4.1 19 November 2007Copyright © 2007, Nortel Networks.
