Cisco 15310-MA Instrukcja Naprawy Pobierz pdf (Strona 50)

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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 Electrical Circuit Path

Step 7 Verify that the circuits connect to the correct slots. For example, verify that source node OC-N port (east

slot) is connected to the destination node (west slot). If two east slots or two west slots are connected,

the circuit does not work. Except for the distinct slots, all other circuit information, such as ports, should

be identical.

Step 8 Continue with the “Test the Hairpin Circuit” procedure on page 1-14.

Test the Hairpin Circuit

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

Step 2 Examine the test traffic received by the test set. Look for errors or any other signal information indicated

by the test set.

Step 3 If the test set indicates a good circuit, no further testing is necessary; clear the hairpin circuit:

a. Click the Circuits tab.

b. Choose the hairpin circuit being tested.

c. Click Delete.

d. Click Yes in the Delete Circuits dialog box.

e. Confirm that the hairpin circuit is deleted from the Circuits tab list.

f. Continue with the “1.2.6 Perform a Facility Loopback on a Destination Port” procedure on

page 1-14.

1.2.6 Perform a Facility Loopback on a Destination Port

The final facility loopback test is performed on the last port in the circuit— in this case the port in the

destination node. Completing a successful facility loopback on this port isolates the possibility that the

destination-node cabling, card, or LIU is responsible for a faulty circuit.

Caution Performing a loopback on an in-service circuit is allowed but is service-affecting.

Note Loopbacks operate only on ports in the OOS,MT administrative state.

Create a Facility Loopback Circuit on a Destination Port

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

a. If you just completed the “1.2.5 Perform a Hairpin Test on a Destination-Node Port” procedure on

page 1-13, leave the electrical test set connected to the electrical port in the destination node.

b. If you are starting the current procedure without the electrical test set connected to the electrical

port, use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the

electrical interface panel.

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