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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.3.6 Perform a Facility Loopback on a Destination-Node OC-N Port
Note It is normal for a 2.7.158 LPBKFACILITY (OCN) condition to appear during a loopback setup.
The condition clears when you remove the loopback.
Step 4 Create the facility 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 15310-CL-CTX or CTX2500 with the OC-N port that requires the
loopback.
c. Click the Maintenance > Optical > Loopback > Port tabs.
d. Select OOS,MT from the Admin State column.
e. Select Terminal from the Loopback Type column.
f. Click Apply.
g. Click Yes in the confirmation dialog box.
Note It is normal for a 2.7.158 LPBKFACILITY (OCN) condition to appear during loopback
setup. The condition clears when you remove the loopback.
Step 5 Continue with the “Test the Facility Loopback Circuit” procedure on page 1-23.
Test the Facility Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test
set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary with the facility loopback:
Step 3 Clear the facility loopback:
a. Click the Maintenance > Optical > Loopback > Port tabs.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (IS,AINS; OOS,DSBLD; or OOS,MT) from the Admin State column
for the port being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 4 Clear the facility loopback circuit:
a. Click the Circuits tab.
b. Choose the loopback circuit being tested.
c. Click Delete.
d. Click Yes in the Delete Circuits dialog box.