Cisco 15310-MA Guide de dépannage télécharger pdf (Page 55)

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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, Release 9.0

78-18394-01

Chapter 1 General Troubleshooting

Identify Points of Failure on an OC-N Circuit Path

Test the Cross-Connect Loopback Circuit

Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.

Step 2 Examine the test 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 cross-connect. Clear the

cross-connect loopback:

a. In card view, click the Maintenance > Optical > Loopback > SONET STS tabs.

b. Uncheck the check box in the XC Loopback column for the circuit being tested.

c. Click Apply.

d. Click Yes in the confirmation dialog box.

Step 4 If the test set indicates a faulty circuit, there might be a problem with the cross-connect portion of the

15310-CL-CTX or CTX2500 card. Complete the “1.3.3 Perform a Terminal Loopback on a

Source-Node OC-N Port” procedure on page 1-19.

1.3.3 Perform a Terminal Loopback on a Source-Node OC-N Port

The terminal loopback test is performed on the node destination port in the circuit, in this example, the

destination OC-N port in the source node. First, create a bidirectional circuit that starts on the node

source OC-N port and loops back on the node destination OC-N port. Then continue with the terminal

loopback test. Completing a successful terminal loopback to a node destination OC-N port verifies that

the circuit is good up to the destination OC-N. Performing a loopback on an in-service circuit is

service-affecting.

Create the Terminal Loopback on a Source Node OC-N Port

Step 1 Connect an optical test set to the port you are testing:

a. If you just completed the “1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port”

procedure on page 1-18, leave the optical test set connected to the OC-N port in the source node.

b. If you are starting the current procedure without the optical test set connected to the OC-N port, use

appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are

testing.

c. Adjust the test set accordingly.

Step 2 Use CTC to set up the terminal loopback circuit on the port being tested:

a. Click the Circuits tab and click Create.

b. Give the circuit an easily identifiable name, such as OCN1toOCN2.

c. Set circuit Type and Size to the normal preferences, such as STS and STS1.

d. Verify that Bidirectional is checked.

e. Click Next.

f. In the Circuit Source dialog box, fill in the same Node, Slot, Port, and Type where the test set is

connected and click Next.

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Cisco 15310-MA Guide de dépannage Page 55