Ethernet Service Troubleshooting Troubleshooting
Note the following:
The local port can be manually operated to resume remote loopback (special OAM PDU
will be sent toward remote port automatically).
In addition, each port can be locally configured to resume the remote loopback applied
after a timeout of 5 to 30 minutes. The Timer is started upon initial remote loopback
request OAMPDU arrived and is not reset upon follows OAMPDU, i.e. loopback cannot
be applied longer then predefined time. For infinite loopback (until manual resume),
timeout option should be turned Off.
To perform Remote Loopback:
NOTE: Test traffic is to be provided by an external device.
1. In the Ethernet port configuration dialog:
Enable 802.3ah OAM on the link ports on which the test will be performed.
Configure the Loopback Timeout parameters.
2. Interconnect the ports using a standard Ethernet cable.
3. Verify the connection as follows:
Access the Ethernet pane of one (or both) of the interconnected ports ( (in the
Network Element tree, under Ethernet Ports, click the Ethernet port - the relevant
Ethernet port appears).
In the EFM OAM area, click Details and verify that Peer Capabilities Loopback is
enabled; otherwise, check the connection.
4. In the port pane, EFM OAM area, click the Operate Loopback button to perform the
loopback test.
5. In the port pane, EFM OAM area, click the Loopback Statistics button. The EFM OAM
Statistics window appears.
6. Use the window to analyze the Loopback test results.
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