Cisco 15310-MA Anleitung zur Fehlerbehebung PDF herunterladen (Seite 53)

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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

Note The test sequence for your circuits differs according to the type of circuit and network topology.

Note Facility and terminal loopback tests require on-site personnel.

1.3.1 Perform a Facility Loopback on a Source-Node OC-N Port

The facility loopback test is performed on the node source port in the network circuit, in this example,

the source 15310-CL-CTX or CTX2500 card OC-N port in the source node. Completing a successful

facility loopback on this port isolates the OC-N port as a possible failure point. Performing a loopback

on an in-service circuit is service-affecting.

Create the Facility Loopback on the Source OC-N Port

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

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

testing.

Step 2 Use CTC to create the facility loopback circuit on the port being tested:

a. In node view, double-click the controller card (15310-CL-CTX or CTX2500) to display the card

view.

b. Click the Maintenance > Optical > Loopback > Port tabs.

c. Choose OOS,MT from the Admin State column for the port being tested.

d. Choose Facility from the Loopback Type column for the port being tested.

e. Click Apply.

f. Click Yes in the confirmation dialog box.

Note It is normal for a 2.7.162 LPBKFACILITY (OCN) condition to appear during loopback

setup. The condition clears when you remove the loopback.

Step 3 Continue with the “Test the Facility Loopback Circuit” procedure on page 1-17.

Test the Facility Loopback Circuit

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

Step 2 Examine the 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 facility loopback. Clear the

facility loopback:

g. Click the Maintenance > Optical > Loopback > Port tabs.

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Cisco 15310-MA Anleitung zur Fehlerbehebung Seite 53