Cabletron Systems 9A128-01 Manual De Usuario

4-1

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:

•

 — 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.

•

 — 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.