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9-8
C
9: FDDI O
HAPTER
Station
Management
SMT Operation
FDDI MIB
I
VERVIEW AND
MPLEMENTATION
Each FDDI station has one Station Management (SMT) entity to provide
connection management, ring management, and operational management
to the FDDI network. SMT specifies a set of services and signaling
mechanisms dedicated to FDDI network management. It manages those
services of each station on the FDDI network that are specific to the Physical
Layer and the MAC portion of the Data Link Layer.
The goal of SMT is to completely define shared medium-management
services to guarantee the interoperability of FDDI network equipment from
multiple vendors.
The operation of SMT falls into three broad categories:
Physical Connection Management (PCM) — Establishes and maintains
point-to-point physical links between neighboring ports. It provides all the
signaling necessary to initialize connections, withhold marginal
connections, and support maintenance.
Configuration Management (CFM) — Interconnects PHYs and MACs on
paths to achieve proper station configuration and network topology.
Ring Management (RMT) — Manages a MAC's operation in an FDDI ring.
RMT detects stations that are "stuck" in the beacon process and initiates the
trace function. RMT locates duplicate addresses that might prevent the ring
from operating.
The FDDI Management Information Base (MIB) defines the collection of
information available to network management about an FDDI station. The
MIB uses an object-oriented approach similar to that used in OSI
management standards.
FDDI-managed objects include SMT (that is, the SMT of the station), MACs,
paths, and ports. Each of these objects has a collection of attributes such as
statistics, error counters, configuration information, event notifications, and
actions.
You can access a station's MIB locally through a local management interface
or remotely through a management protocol such as Parameter
Management Frame (PMF) or Simple Network Management Protocol
(SNMP). The SMT standard specifies the meaning and encoding of each MIB
attribute.
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