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Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
78-17742-02
Chapter 1 General Troubleshooting
1.2.6 Perform a Terminal Loopback on a Destination-Node MXP or TXP Port
Step 3 If the test set indicates no errors, 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.
b. Click the Maintenance > Loopback tabs.
c. Select None from the Loopback Type column for the port being tested.
d. Choose the appropriate state to place the port in service, out of service and disabled, out of service
for maintenance, or automatically in service from the Admin State column for the port being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 4 If the test set indicates errors, the problem might be a faulty card.
Step 5 Complete the “Test the MXP or TXP Card” procedure on page 1-23.
Test the MXP or TXP Card
Step 1 Complete the “Physically Replace a Card” procedure on page 2-172 for the suspected bad card and
replace it with a known-good one.
Warning
High-performance devices on this card can get hot during operation. To remove the card, hold it by
the faceplate and bottom edge. Allow the card to cool before touching any other part of it or before
placing it in an antistatic bag.
Statement 201
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
“2.8.1 Protection Switching, Lock Initiation, and Clearing” section on page 2-167. For more
information, refer to the “Maintain the Node” chapter in the Cisco ONS 15454 DWDM Procedure Guide.
Step 2 Resend test traffic on the loopback circuit with a known-good card.
Step 3 If the test set indicates no errors 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).
Step 4 Complete the “Physically Replace a Card” procedure on page 2-172 for the defective card.
Step 5 Clear the terminal loopback on the port:
a. Double-click the source-node card with the terminal loopback.
b. Click the Maintenance > Loopback tabs.
c. Select None from the Loopback Type column for the port being tested.
d. Choose the appropriate state to place the port in service, out of service and disabled, out of service
for maintenance, or automatically in service from the Admin State column for the port being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
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