Installing and Administering HP FDDI/9000 Software

Chapter 1 31
FDDI Resources
FDDI Concepts
For error detection and performance analysis, the MAC entity in each
station maintains statistics on all frames received at and transmitted
from the station. The MAC counter, Frame Count (Frame_Ct),
specifies the total number of frames received at the station. To be
counted as a frame, the frame must conclude with an ending delimiter,
the symbol that indicates the ending of tokens and frames. The MAC also
monitors the Receive Count (Receive_Ct), which indicates the total
number of SMT or LLC frames successfully received by the station, the
Transmit Count (Transmit_Ct), which indicates the total number of
frames originated by the station, the Lost Count (Lost_Ct), which
indicates the total number of frames received with a format error
detected, and the Error Count (Error_Ct), which indicates the total
number of frames received with the error indicator as E and not yet set
to S. All stations on the ring inspect repeated frames for errors. If an
error is detected and the received E indicator was not set to S, then an
error is counted. The E indicator is set to S by a station when either an
error to be counted is detected or the received E indicator is set to S.
(Refer to the fddistat(1M) manpage for additional details about these
fields and how to display them at your workstation.)