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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.4.1 Perform a Facility Loopback on a Source-Node Optical Port
Note It is normal for the “CLPBKFACILITY (OCN)” condition on page 2-172 or the
“LPBKFACILITY (G1000)” condition on page 2-172 to appear during loopback setup. The
condition clears when you remove the loopback.
Step 8 Complete the “Test and Clear the Facility Loopback Circuit” procedure on page 1-49.
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 > 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; IS,AINS) from the Admin State column
for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 4 Complete the “Test the OC-N Card” procedure on page 1-49.
Test the OC-N Card
Step 1 Complete the “Physically Replace a Traffic Card” procedure on page 2-273 for the suspected bad card
and replace it with a known-good one.
Step 2 Resend test traffic on the loopback circuit with a known-good card installed.
Step 3 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 at 1 800 553-2447.
Step 4 Complete the “Physically Replace a Traffic Card” procedure on page 2-273 for the faulty card.
Step 5 Clear the facility loopback:
a. Click the Maintenance > 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; IS,AINS) from the Admin State column
for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
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