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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter1 General Troubleshooting
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
Step3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support (1 800 553-2447).
Step4 Complete the “Physically Replace a Card” procedure on page 2-154 for the faulty card.
Step5 Clear the facility loopback from the port:
a. Double-click the card and click the Maintenance > Optical > Loopback > Port 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.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step6 Clear the facility loopback circuit:
a. Click the Circuits tab.
b. Choose the loopback circuit being tested.
c. Click Delete.
d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
Step7 Complete the “1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports” procedure on
page 1-36.
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the destination port is causing circuit trouble. To do this, you create a bidirectional circuit that
originates on the source-node Ethernet port and loops back on the intermediate-node port. You then
proceed with the terminal loopback test. If you successfully complete a terminal loopback on the node,
this node is excluded from possible sources of circuit trouble.
Caution Performing a loopback on an in-service circuit is service-affecting.
Note Terminal loopbacks require on-site personnel.
Complete the “Create a Terminal Loopback on Intermediate-Node OC-N Ports” procedure on page1-37.