Avaya Configuring Line Services Bedienungsanleitung Seite 47

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About Line Protocols
114078 Rev. A 2-11
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.
SMT Frame Services
SMT frame services manage and control the FDDI network and the nodes on the
network. Different SMT frame classes and types implement these services. Frame
class identifies the function that the frame performs. Frame type specifies whether
the frame is an announcement, a request, or a response to a request. FDDI SMT
frames are limited to a single FDDI ring. The frames cannot move across WANs
or across multiple FDDI rings. The frames do not manage functions outside
FDDI.
Table 2-1 lists the SMT frames that Bay Networks routers support.
Table 2-1. SMT Frame Classes and Types
Frame Class Frame Type
Neighbor Information Frames (NIF) Request/Response
Status Information Frames (SIF) Response
Echo Frames (ECF) Response
Request Denied Frames (RDF) Response
Status Report Frames (SRF) Announcement
Parameter Management Frames (PMF)
(PMF Get Response frames only) Response
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