Cisco ONS 15454 - Create the Facility Loopback on the Source-Node Ethernet Port; Test and Clear the Facility Loopback Circuit

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.5.1 Perform a Facility Loopback on a Source-Node Ethernet Port
Caution Performing a loopback on an in-service circuit is service-affecting.
Complete the “Create the Facility Loopback on the Source-Node Ethernet Port” procedure on page 1-70.
Create the Facility Loopback on the Source-Node Ethernet Port
Step 1 Connect an optical test set to the port you are testing.
Note For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
Use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing. The Tx and Rx terminals connect to the same port.
Step 2 Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 3 In CTC node view, double-click the card to open the card view.
Step 4 Click the Maintenance > Loopback tabs.
Step 5 Choose OOS,MT from the Admin State column for the port being tested. If this is a multiport card,
select the appropriate row for the desired port.
Step 6 Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card,
select the appropriate row for the desired port.
Step 7 Click Apply.
Step 8 Click Yes in the confirmation dialog box.
Note It is normal for the “LPBKFACILITY (G1000)” condition on page 2-172 to appear during
loopback setup. The condition clears when you remove the loopback.
Step 9 Complete the “Test and Clear the Facility Loopback Circuit” procedure on page 1-70.
Test and Clear the Facility Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test
set is capable of indicating.
Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
facility loopback:
a. Click the Maintenance > Loopback tabs.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.