Reference Guide

Enabling Cross-Checking

To enable cross-checking, use the following commands.

1. Enable cross-checking.

ETHERNET CFM mode

mep cross-check enable

The default is Disabled.

2. Start the cross-check operation for an MEP

ETHERNET CFM mode

mep cross-check mep-id

3. Configure the amount of time the system waits for a remote MEP to come up before the cross-check operation is

started.

ETHERNET CFM mode

mep cross-check start-delay number

Sending Loopback Messages and Responses

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.

• Send a Loopback message

EXEC Privilege mode

ping ethernet domain name ma-name ma-name remote {mep-id | mac-addr mac-

address}source {mep-id | port interface}

Sending Linktrace Messages and Responses

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.