Cisco ONS 15454 SDH - Test and Clear the Optical Terminal Loopback Circuit

1-60
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.3.7 Perform a Terminal Loopback on a Destination-Node Optical Port
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 in the Dir
column as a two-way circuit.
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 destination 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, such as the destination-node optical,
G-Series, MXP, or TXP card.
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 1-60.
Test and Clear the Optical Terminal Loopback 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 being 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 on the loopback circuit. Clear the
terminal loopback on the port:
a. Double-click the intermediate-node card with the terminal loopback.
b. Click the Maintenance > Loopback > Port tabs.
c. Select None from the Loopback Type column for the port being tested.
d. Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the
Admin State column for the port being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.