Troubleshooting Guide

Name Description
• l2TraceLookupFailure (8): Lookup failure for
L2Trace
Triggering a loopback test
Use this procedure to trigger a loopback test.
The LBM packet is often compared to ping. An MEP transmits the loopback message to an
intermediate or endpoint within a domain for the purpose of fault verification. This can be used to
check the ability of the network to forward different sized frames.
Before you begin
• On the source and destination nodes, you must configure a CFM MD, MA, and MEP.
• Enable the MEP.
• Assign a nodal MEP to the B-VLAN.
Procedure
1. In the navigation tree, expand the following folders: Configuration > Edit > Diagnostics.
2. Click CFM.
3. Click the LBM tab.
4. Configure the loopback test properties as required.
5. Click Apply.
6. To trigger the loopback test, double-click in the Status field, select transmit.
7. Click Apply.
8. To update the loopback test, click the Refresh button.
LBM field descriptions
Use the data in the following table to use the LBM tab.
Name
Description
DomainIndex Specifies the MD index value.
AssociationIndex Specifies the MA index value.
Index Specifies the Maintenance Endpoint index value.
DomainName Specifies the MD name.
AssociationName Specifies the MA name.
DestMacAddress Specifies the remote MAC address to reach the
MEP/MIP.
Table continues…
Operations and Management
January 2017 Troubleshooting 204
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