FDDI Management

6-12 Viewing FDDI Information

Available statistics are:
Transmit Frames
The number of frames transmitted by the MAC associated with the SMT during the
chosen interval.
Receive Frames
The number of frames received by the MAC associated with the SMT during the chosen
interval.
Frame Errors
The number of error frames detected by the MAC associated with the SMT during the
chosen interval that had not been detected previously by other stations. Error frames may
include frames with an invalid Frame Check Sequence (FCS), with data length errors, or
with internal errors that prevent the MAC from transferring the frame to the Logical Link
Control (LLC) layer.
Lost Frames
The number of frames detected by the MAC associated with the SMT during the chosen
interval that have 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.
Ring Ops
The number of times the ring has entered the “Ring Operational” state from the “Ring Not
Operational” state during the selected interval. This counter updates when the MAC
informs Station Management (SMT) of a change in Ring Operation status.
FDDI Statistics
The FDDI Statistics window displays traffic statistics for the HSIM-F6’s SMT entity,
including the number of frames and kilobytes per second (averaged over a defined poll
rate), the peak number of kilobytes per second, and the module’s bandwidth utilization
(expressed as a percentage) for the current poll interval.
To access the FDDI Statistics window:
1. In the Device View window, click on Device to display the Device menu.
2. Select FDDI Statistics. The FDDI Statistics window (Figure 6-6) will appear.