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Ethernet Connection Fault Management
CFM uses Ethernet frames and is distinguishable by ether-type 0x8902. In certain
cases the different functions will use a reserved multicast address that could also be
used to identify specific functions at the MAC layer. However, the multicast MAC
addressing is not used for every function or in every case. The Operational Code
(OpCode) in the common CFM header is used to identify the type of function carried
in the CFM packet. CFM frames are only processed by IEEE MAC bridges. With
CFM, interoperability can be achieved between different vendor equipment in the
service provider network up to and including customer premises bridges. The
following table lists CFM-related acronyms used in this section.
8.1.1
Table
Table 204
(1 of 2)
168
Acronym Callout
204
lists CFM-related acronyms used in this section.
Acronyms
Acronym
Callout
1DM
One way Delay Measurement (Y.1731)
AIS
Alarm Indication Signal
CCM
Continuity check message
CFM
Connectivity fault management
DMM
Delay Measurement Message (Y.1731)
DMR
Delay Measurement Reply (Y.1731)
LBM
Loopback message
LBR
Loopback reply
LMM
Loss Measurement Message
LMR
Loss Measurement Reply
LTM
Linktrace message
LTR
Linktrace reply
ME
Maintenance entity
MA
Maintenance association
MA-ID
Maintenance association identifier
MD
Maintenance domain
MEP
Maintenance association end point
MEP-ID
Maintenance association end point identifier
MHF
MIP half function
MIP
Maintenance domain intermediate point
OpCode
Operational Code
PRBS
Pseudo Random Bit Sequence
3HH-11982-AAAA-TQZZA
"FD 100/320Gbps NT and FX NT IHub System
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