Cisco ONS 15454 - Test and Clear the Optical Terminal Loopback Circuit

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.4.5 Perform a Terminal Loopback on Intermediate-Node Optical Ports
c. Click Next.
d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
OCN1toOCN4.
e. Leave the Bidirectional check box checked.
f. Click Next.
g. In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and STS (or VT)
where the test set is connected.
h. Click Next.
i. In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT)
used for the source dialog box.
j. Click Next.
k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.
Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir
column as a two-way circuit.
Note It is normal for the “LPBKTERMINAL (OCN)” condition on page 2-177 to appear during a
loopback setup. The condition clears when you remove the loopback.
Step 5 Create the terminal loopback on the destination port being tested:
a. Go to the node view of the intermediate node:
• Choose View > Go To Other Node from the menu bar.
• Choose the node from the drop-down list in the Select Node dialog box and click OK.
b. In node view, double-click the card that requires the loopback.
c. Click the Maintenance > Loopback > Port tabs.
d. Select OOS,MT from the Admin State column. If this is a multiport card, select the row appropriate
for the desired port.
e. Select Terminal from the Loopback Type column. If this is a multiport card, select the row
appropriate for the desired port.
f. Click Apply.
g. Click Yes in the confirmation dialog box.
Step 6 Complete the “Test and Clear the Optical Terminal Loopback Circuit” procedure on page 1-61.
Test and Clear the Optical Terminal Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the test traffic being 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 on the loopback circuit. Clear the
terminal loopback from the port:
a. Double-click the intermediate-node card with the terminal loopback to open the card view.