Name: Cisco ONS 15454 DWDM
Brand: Cisco
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Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1

78-17742-02

Chapter 1 General Troubleshooting

1.2.2 Perform a Terminal Loopback on a Source-Node MXP or TXP Port

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 installed.

Step 3 If the test set indicates no errors, the problem was probably the defective card. Return the defective card

to Cisco through the Return Materials Authorization (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 faulty card.

Step 5 Clear the facility loopback:

a. Click the Maintenance > Loopback tabs.

b. Choose None from the Loopback Type column for the port being tested.

c. 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.

d. Click Apply.

e. Click Yes in the confirmation dialog box.

Step 6 Complete the “1.2.2 Perform a Terminal Loopback on a Source-Node MXP or TXP Port” procedure on

page 1-10.

1.2.2 Perform a Terminal Loopback on a Source-Node MXP or TXP Port

The terminal loopback test is performed on the node source MXP or TXP muxponder or transponder

port. For the circuit in this example, it is the source TXP trunk port or a client port in the source node.

Completing a successful terminal loopback to a node source port verifies that the circuit is through the

source port. Figure 1-4 shows an example of a terminal loopback on a source TXP port and a client TXP

port.

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