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9-6

Monitoring Network Traffic

Using Traffic Monitor

To change your threshold settings, select a network type such as Ethernet.

The threshold values for the attributes for Ethernet segments are displayed.

You can either move the sliders to the left or right to increase or decrease a

threshold value, or click on the up/down controls underneath the sliders to

fine tune the threshold values. As you move the sliders, these values will

change accordingly. To save your changes, click on Apply at the bottom of the

Threshold window. The changes are applied to all segments of that type, for

example, all Ethernet segments. When you are finished making changes, click

on OK to exit the window.

Note If you click on OK, any changes that you have made and not yet applied will

be applied. If you click on Cancel, any changes that haven't been applied are

not applied. If you have applied changes before clicking on Cancel, those

changes remain applied.

If you want to change the thresholds for a single segment, select the Segments

tab at the top of the window. Select a segment from the list box. The

Thresholds window now reflects the attribute threshold values for that

segment. Click on Apply to save any changes.

Note If you select a different segment from the list box before you have applied

your changes, a message will appear asking you if you want to apply your

changes.

Initially, default values are in effect for all segment types. The Defaults button

returns the threshold values for that segment or segment speed to the original

default values.

Note Traffic Monitor will send a trap to the configured trap receivers when a

threshold has been exceeded. The Traffic Monitor page does not need to be

open for Thresholds traps to be sent.

Displaying the Network Meter

The Network Meter provides an “at-a-glance” look at the most severe traffic

problem on the network being monitored during the current minute. To launch

the Network Meter, click on the Net Meter button below the histogram on the

Traffic Monitor page. Clicking on the Show Worst 5 Segments button displays

a window showing the top five thresholds that have been exceeded and the

associated segments.

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