Technical data

SMT Device ConÞguration View
Station ConÞguration View
ConÞguration Views NBR-620, NBR-420 and NBR-220
3-8 Management Module Guide
MAC ConÞguration
The actual conÞguration of the station. Table 3-3 shows the possible
conÞgurations.
Directed The claim/beacon process did not complete within 9
seconds. The concentrator is now sending directed beacons
to indicate a problem.
Trace A problem has been detected with the station or its
upstream neighbor. A trace is being sent to notify the
upstream neighbor of the problem. The concentrator and all
stations between the concentrator and its upstream
neighbor can perform self-tests.
Table 3-2. FDDI Ring States
Table 3-3. SMT MAC ConÞgurations
Ring States Description
Isolated The path is not inserted into any path.
Local_A The A port is inserted into a local path and the B port is
not.
Local_B The B port is inserted into a local path and the A port is
not.
Local_AB Both A and B are inserted into a local path.
Local_S The S port is inserted into a local path.
Wrap_A The secondary path is wrapped to the A port.
Wrap_B The secondary path is wrapped to the B port.
Wrap_AB The primary path is wrapped to the B port and the
secondary path is wrapped to the A port.
Wrap_S The primary port is wrapped to the S port.
C_Wrap_A The primary and secondary paths are joined internally in
the station and wrapped to the A port. Regarding the token
ßow, all of the resources on the secondary path precede
those of the primary path.
C_Wrap_B The primary and secondary paths are joined internally in
the station and wrapped to the B port. Regarding the token
ßow, all of the resources on the secondary path precede
those of the primary path.