Avaya Configuring Line Services Manual do Utilizador Página 49

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About Line Protocols
115391-A Rev. A 2-11
FDDI SMT
BayStream platforms support Version 7.2 of the SMT protocol. SMT is a
low-level protocol that manages the FDDI functions provided by the PMD, the
PHY, and the MAC. SMT can run only on a single FDDI ring and can manage
only the FDDI components and functions within a node.
SMT contains three components:
Connection Management (CMT)
Ring Management (RMT)
SMT frame services
CMT
CMT performs these functions:
Inserts and removes stations at the PHY level
Connects PHYs and MACs with a node
Uses trace diagnostics to identify and isolate a faulty component
Manages the physical connection between adjacent nodes, including
-- Testing the quality of the link before establishing a connection
-- Establishing a connection
-- Monitoring link errors continuously when the ring is operational
RMT
RMT receives status information from the MAC and CMT, reporting this
information to SMT and higher-level processes (for example, SNMP). It detects
stuck beacon conditions and duplicate addresses, and determines when the MAC
is available for transmitting frames. Duplicate addresses prevent the proper
operation of the ring.
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