Cabletron Systems 7C04-R, 7C03 manual Lost Count, Viewing Fddi MAC Meters

FDDI Management

Lost Count

Displays the number of MAC PDUs (Protocol Data Units include both tokens and frames) that contain an unknown error, so their validity is in doubt. When the MAC encounters a frame of this type, it increments the Lost Frame counter and strips the remainder of the frame from the ring, replacing it with idle symbols.

Changing the Measurement of Data

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

•Absolute ––displays the chart variable values recorded in the device MIB counters.

•Delta ––displays the difference in value for the selected data between the current poll interval and the last interval.

•Cumulative ––displays the total since the Cumulative button was selected.

•Clear ––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 MAC Chart window, click .

Viewing FDDI MAC Meters

To view the FDDI MAC Meters window, highlight an entry in the MAC

Configuration scroll list and click . The FDDI MAC Meters window, Figure 4-9, 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 4-9. FDDI MAC Meters Window

SMT/MAC Configuration 4-19