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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter1 General Troubleshooting
1.6.3 Perform a Facility Loopback on an Inte rmediate-Node OC-N Port
Note It is normal for the “LPBKFACILITY (OCN)” condition on page2-103. The condition
clears when you remove the loopback.
Step6 Complete the “Test and Clear the OC-N Facility Loopback Circuit” procedure on page1-35.
Test and Clear the OC-N Facility Loopback Circuit
Step1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step2 Examine the traffic received by the test set. Look for errors or any other signal information that the test
set is capable of indicating.
Step3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
facility loopback from the port:
a. Double-click the 15310-CL-CTX or CTX2500 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.
Step4 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.
Step5 Complete the “Test the OC-N (Controller) Card” procedure on page 1-35.
Test the OC-N (Controller) Card
Step1 Complete the “Physically Replace a Card” procedure on page2-154 for the suspected bad card and
replace it with a known-good one.
Caution Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. Refer to the procedures in the
“2.10.1 Protection Switching, Lock Initiation, and Clearing” section on page2-147. For more
information, refer to the “Maintain the Node” chapter in the Cisco ONS 15310-CL and
Cisco ONS 15310-MA Procedure Guide.
Step2 Resend test traffic on the loopback circuit with a known-good card installed.