Test and Clear the MXP or TXP Terminal Loopback Circuit
SUMMARY STEPS
1. If the test set is not already sending traffic, send test traffic on the loopback circuit.
2. Examine the test traffic being received by the test set. Look for errors or any other signal information that
the test set is capable of indicating.
3. If the test set indicates no errors, no further testing is necessary on the loopback circuit. Clear the terminal
loopback from the port:
4. If the test set indicates errors, complete the Test the MXP or TXP Card, on page 20.
DETAILED STEPS
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the test traffic being 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 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 to display the card view.
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.
g) Complete the Perform a Facility Loopback on a Destination-Node MXP, TXP, XP, or ADM-10G Port, on page 21.
Step 4 If the test set indicates errors, complete the Test the MXP or TXP Card, on page 20.
Test the MXP or TXP Card
SUMMARY STEPS
1. Complete the Physically Replace a Card, on page 453 for the suspected bad card and replace it with a
known-good one.
2. Resend test traffic on the loopback circuit with a known-good card.
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.
4. Clear the terminal loopback on the port:
5. Complete the Perform a Facility Loopback on a Destination-Node MXP, TXP, XP, or ADM-10G Port,
on page 21.
DETAILED STEPS
Step 1 Complete the Physically Replace a Card, on page 453 for the suspected bad card and replace it with a known-good one.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
20
General Troubleshooting
Test and Clear the MXP or TXP Terminal Loopback Circuit
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