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Administering FDDI MACs 8-15
■ LLC service is disabled.
■ This is an NSA Frame and the A-bit is set.
Figure 8-1 shows the order in which these discard tests are made.
Figure 8-1 How Frame Processing Affects FDDI MAC Receive Frame Statistics
Frames are delivered to an FDDI MAC by bridges and management
applications. However, a frame might be discarded for the following
reasons:
■ LLC Service is disabled.
■ The FDDI ring is not operational.
■ There is no room on the transmit queue.
■ An error has occurred during frame transmission.
rxFrames
noRxBuffers
errorCount
rxInternalErrs
rxDiscards
rxUcastFram
es
Frames received from the
Frames discarded because buffer
space
Frames discarded because frame
Frames delivered by this FDDI
processing of
Receive Frame. . .
. . .from FDDI
Network
=
Frames discarded because LLC
Service disabled or NSA frame with A-