82 | 802.1ag
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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.
Linktrace Message and Response
Linktrace Message and Response (LTM, LTR), also called Layer 2 Traceroute, is an administratively sent
multicast frames transmitted by MEPs to track, hop-by-hop, the path to another MEP or MIP within the
maintenance domain. All MEPs and MIPs in the same domain respond to an LTM with a unicast LTR.
Intermediate MIPs forward the LTM toward the target MEP.
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
MPLS Core
MEP
MIP MIP
MIP
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