Cabletron Systems 7C04 사용자 설명서

Port Configuration

4-7

FDDI Management

Measurement fields located at the bottom of the FDDI Port Chart window allow 
you to change how the incoming data is measured:

•

displays the chart variable values recorded in the device MIB 

counters.

•

 displays the difference in value for the selected data between the 

current poll interval and the last interval.

•

displays the total since the Cumulative button was selected.

•

 resets Cumulative totals to zero; this option is not available in the 

Absolute or Delta modes.

To change the type of measurement, or to clear and restart Cumulative totals, click 
mouse button 1 on the appropriate shadowed button.

To exit the FDDI Port Chart window, click 

. 

To view the FDDI Port Meters window, highlight one or more ports in the scroll 
list and click 

. The FDDI Port Meters window, 

, will appear. 

Each of the meters provided displays a single statistic in a format that lets you 
know at a glance if the counter is registering high, medium, or low values.

Figure 4-4. FDDI Port Meters Window

The FDDI Port Meters window graphically displays the following statistics:

The LER (Link Error Rate) Estimate displays a cumulative long term average of 
the bit error rate, which represents the quality of the physical link. It is computed 
when the port is connected, and every 10 seconds thereafter. The value of the LER