Cisco ONS 15454 SDH - Page 53

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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.3.5 Perform a Terminal (Inward) Loopback on an Intermediate-Node Optical Ports
Step 3 Use CTC to set up the terminal (inward) 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 and size, such as a VC HO.
c. Click Next.
d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
STM1toSTM4.
e. Leave the Bidirectional check box checked. Leave the default value for State.
f. Click Next.
g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the
test set is connected.
h. Click Next.
i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for
the source dialog box.
j. Click Next.
k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults.
l. If the VC Optimization dialog box appears, leave all defaults.
m. Click Finish.
Step 4 Confirm that the newly created circuit appears on the Circuits tab list and that it is described as a
two-way circuit in the Dir column.
Note It is normal for the “LPBKTERMINAL (STM1E, STMN)” condition, page 2-175 to appear
during a loopback setup. The condition clears when you remove the loopback.
Step 5 Create the terminal loopback on the destination port being tested:
a. Go to the node view of the intermediate node:
• From the View menu choose Go To Other Node.
• Choose the node from the drop-down list in the Select Node dialog box and click OK.
b. In node view, double-click the card that requires the loopback.
c. Click the Maintenance > Loopback > Port tabs.
d. Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row
appropriate for the desired port.
e. Select Terminal (Inward) from the Loopback Type column. If this is a multiport card, select the
row appropriate for the desired port.
f. Click Apply.
g. Click Yes in the confirmation dialog box.
Step 6 Complete the “Test and Clear the Optical Terminal Loopback Circuit” procedure on page 1-54.