C
HAPTER
41
| CFM Commands
Continuity Check Operations
– 1340 –
ethernet cfm cc
enable
This command enables the transmission of continuity check messages
(CCMs) within a specified maintenance association. Use the no form to
disable the transmission of these messages.
SYNTAX
[no] ethernet cfm cc enable md domain-name ma ma-name
domain-name – Domain name. (Range: 1-43 alphanumeric
characters)
ma-name – Maintenance association name. (Range: 1-43
alphanumeric characters)
DEFAULT SETTING
Disabled
COMMAND MODE
Global Configuration
COMMAND USAGE
◆ CCMs are multicast periodically by a MEP in order to discover other
MEPs in the same MA, and to assure connectivity to all other MEPs/MIPs
in the MA.
◆ Each CCM received is checked to verify that the MEP identifier field sent
in the message does not match its own MEPID, which would indicate a
duplicate MEP or network loop. If these error types are not found, the
CCM is stored in the MEP’s local database until aged out.
◆ If a maintenance point fails to receive three consecutive CCMs from any
other MEP in the same MA, a connectivity failure is registered.
◆ If a maintenance point receives a CCM with an invalid MEPID or MA
level or an MA level lower than its own, a failure is registered which
indicates a configuration error or cross-connect error (i.e., overlapping
MAs).
EXAMPLE
This example enables continuity check messages for the specified
maintenance association.
Console(config)#ethernet cfm cc enable md voip ma rd
Console(config)#
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