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4-1
Chapter 4
FDDI Management
Configuration; connection policy; station list; and performance
The FDDI menu lets you access windows to view FDDI configuration, connection
policy, station list, and performance with respect to the single Station
Management (SMT) entity which provides each device’s connectivity to the FDDI
FNB backplane.
SMT provides the system management services for the FDDI protocols, including
connection management, node configuration, error recovery, statistics collection,
and management frame encoding. SMT is comprised of various subcomponent
functions, including Connection Management (CMT) and Ring Management
(RMT).
The 9A128-01 is also encoded with MAC (Media Access Control) protocol layer
information — which you can assign to either FNB 1 or FNB 2. The primary
function of the MAC layer is to deliver frames for stations attached to the ring;
this involves transmitting frames onto the ring, removing frames from the ring,
and repeating frames. Other services provided by the MAC component include
providing attached stations with access to the ring in a fair and structured
manner, providing address recognition for incoming frames, and generating and
verifying frame check sequences. Each ring must have at least one MAC
associated with it for correct operation.
The windows that provide information about the FDDI component of the
9A128-01 module are:
• Configuration — This window displays the current configuration of the
selected module with respect to its SMT entity, and shows the status of the
backplane ring to which it is connected.
• Connection Policy — This window shows the types of connections between
the four FDDI PHY (port) types — A, B, M, and S — that will be allowed by the
SMT entity.