Cisco 15310-MA Guide de dépannage télécharger pdf (Page 73)

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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

Create the Hairpin Circuit on the Source-Node Ethernet Port

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

a. If you just completed the “1.6.2 Perform a Terminal Loopback on a Source-Node Ethernet Port”

procedure on page 1-33, leave the Ethernet test set hooked up to the Ethernet port in the source node.

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

use appropriate cabling to connect the Ethernet test set to the port you are testing.

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

Use CTC to set up the hairpin circuit 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 Hairpin1.

e. Choose the Size, such as STS-1.

f. Uncheck the Bidirectional check box. Leave the default values for State, SD Threshold, and

SF Threshold.

g. Click Next.

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

where the test set is connected. Leave Use Secondary Source unchecked.

i. Click Next.

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

used for the source dialog box. Leave Use Secondary Destination unchecked.

k. Click Next.

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

Step 3 Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it

as a one-way circuit.

Step 4 Complete the “Test and Delete the Ethernet Port Hairpin Circuit” procedure on page 1-37.

Test and Delete the Ethernet Port Hairpin 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 hairpin circuit. 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. Do not check any check boxes.

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Cisco 15310-MA Guide de dépannage Page 73