Edge-Core ECS4120-28F, Справочное руководство, Страница: 773 / 938

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CFM Commands
Connectivity Fault Management (CFM) is an OAM protocol that includes proactive
connectivity monitoring using continuity check messages, fault verification
through loop back messages, and fault isolation by examining end-to-end
connections between provider edge devices or between customer edge devices.
CFM is implemented as a service level protocol based on service instances which
encompass only that portion of the metropolitan area network supporting a
specific customer. CFM can also provide controlled management access to a
hierarchy of maintenance domains (such as the customer, service provider, and
equipment operator).
The following list of commands support functions for defining the CFM structure,
including domains, maintenance associations, and maintenance access points. It
also provides commands for fault detection through continuity check messages for
all known maintenance points, and cross-check messages for statically configured
maintenance points located on other devices. Fault verification is supported
through loop back messages, and fault isolation through link trace messages. Fault
notification is also provided by SNMP alarms which are automatically generated by
maintenance points when connectivity faults or configuration errors are detected
in the local maintenance domain.
Table 157: CFM Commands
Command Function Mode
Defining CFM Structures
ethernet cfm ais level Configures the maintenance level at which Alarm
Indication Signal information will be sent GC
ethernet cfm ais ma Enables the MEPs within the specified MA to send frames
with AIS information GC
ethernet cfm ais period Configures the interval at which AIS information is sent GC
ethernet cfm ais suppress
alarm Suppresses AIS messages following the detection of
defect conditions GC
ethernet cfm domain Defines a CFM maintenance domain, sets the authorized
maintenance level, and enters CFM configuration mode;
also specifies the MIP creation method for MAs within this
domain GC
ethernet cfm enable Enables CFM processing globally on the switch GC
ma index name Creates a maintenance association within the current
maintenance domain, maps it to a customer service
instance, and sets the manner in which MIPs are created for
this service instance CFM