Cisco 15310-MA Guide de dépannage télécharger pdf (Page 84)

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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

Troubleshooting Ethernet Circuit Paths With Loopbacks

1.6.7 Perform a Terminal Loopback on a Destination-Node Ethernet Port

The terminal loopback at the destination-node port is the final local hardware error elimination in the

circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit

is good up to the destination port.

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

Note Terminal loopbacks require on-site personnel.

Complete the “Create the Terminal Loopback on a Destination-Node Ethernet Port” procedure on

page 1-48.

Create the Terminal Loopback on a Destination-Node Ethernet Port

Step 1 Connect a test set to the CE100T-8 port that you are testing:

Note For specific procedures to connect, set up, and use the test set equipment, consult the

manufacturer.

a. If you just completed the “1.6.6 Perform a Facility Loopback on a Destination-Node Ethernet Port”

procedure on page 1-45, leave the test set hooked up to the source port.

b. If you are starting the current procedure without the test set hooked up to the source port, use

appropriate cabling to attach the Tx and Rx terminals of the test set to the port you are testing. Both

Tx and Rx connect to the same port.

Step 2 Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)

Step 3 Use CTC to set up the terminal loopback on the test port:

a. In node view, click the Circuits tab and click Create.

b. In the Circuit Creation dialog box, choose the type, such as STS, and number, such as 1.

c. Click Next.

d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as

C1C1toC1C6.

e. Leave the Bidirectional check box checked.

f. Click Next.

g. In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and STS (or VT)

where the test set is connected.

h. Click Next.

i. In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT)

used for the source dialog box.

j. Click Next.

k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.

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Cisco 15310-MA Guide de dépannage Page 84