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Cisco ONS 15327 Troubleshooting Guide, R3.4
April 2003
Chapter 1 General Troubleshooting
Identify Points of Failure on a DS-N Circuit Path
c. The entire DS-N circuit path has now passed its comprehensive series of loopback tests. This circuit
qualifies to carry live traffic.
Step 4 If the test set indicates a faulty circuit, the problem might be a faulty card.
Step 5 Proceed to the “Test the XTC Card” procedure on page 1-20.
Procedure: Test the XTC Card
Step 1 Replace the suspect card with a card known to be good.
Step 2 Resend test-set traffic on the loopback circuit with a good card installed.
Step 3 If the test set indicates a good circuit, the problem is probably the defective card:
a. Return the defective card to Cisco through the returned materials authorization (RMA) process. Call
the Cisco TAC.
b. Replace the faulty card. See the “Physically Replace a Card” procedure on page 2-130 for details.
c. Clear the facility loopback:
• Click the Maintenance > Loopback tabs.
• Choose None from the Loopback Type column for the port being tested.
• Choose the appropriate state (IS, OOS, or OOS_AINS) from the State column for the port being
tested.
• Click the Apply button.
• Click the Yes button in the Confirmation Dialog box.
d. The entire DS-N circuit path has now passed its comprehensive series of loopback tests. This circuit
qualifies to carry live traffic.
Step 4 If the test set indicates a faulty circuit, the problem might be a faulty MIC card.
Step 5 Proceed to the “Test the MIC Card” procedure on page 1-20.
Procedure: Test the MIC Card
Step 1 Replace the suspect card with a card known to be good.
Step 2 Resend test-set traffic on the loopback circuit with a good card installed.
Step 3 If the test set indicates a good circuit, the problem is probably the defective card:
a. Return the defective card to Cisco through the returned materials authorization (RMA) process. Call
the Cisco Technical Assistance Center (Cisco TAC).
b. Replace the faulty card. See the “Physically Replace a Card” procedure on page 2-130 for details.
c. Clear the facility loopback:
• Click the Maintenance > Loopback tabs.
• Choose None from the Loopback Type column for the port being tested.