Reference Guide

802.1ag | 79
4. Reception of a CCM with an MD level lower than that of the receiving MEP, which indicates a
configuration or cross-connect error.
5. Reception of a CCM containing a port status/interface status TLV, which indicates a failed bridge or
aggregated port.
The Continuity Check protocol sends fault notifications (Syslogs, and SNMP traps if enabled) whenever
any of the above errors are encountered.
Enable CCM
Enable Cross-checking
Loopback Message and Response
Loopback Message and Response (LBM, LBR), also called Layer 2 Ping, is an administrative echo
transmitted by MEPs to verify reachability to another MEP or MIP within the maintenance domain. LBM
and LBR are unicast frames.
Step Task Command Syntax Command Mode
1 Enable CCM.
no ccm disable
Default: Disabled
ECFM DOMAIN
2 Configure the transmit interval (mandatory).
The interval specified applies to all MEPs in
the domain.
ccm transmit-interval seconds
Default: 10 seconds
ECFM DOMAIN
Task Command Syntax Command Mode
Enable cross-checking.
mep cross-check enable
Default: Disabled
ETHERNET CFM
Start the cross-check operation for an MEP.
mep cross-check mep-id
ETHERNET CFM
Configure the amount of time the system waits for a
remote MEP to come up before the cross-check operation
is started.
mep cross-check start-delay number
ETHERNET CFM
Task Command Syntax Command Mode
Send a Loopback message. ping ethernet domain name ma-name ma-name remote {mep-id
| mac-addr mac-address} source {mep-id | port interface}
EXEC Privilege