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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port
Step 2 Use CTC to create the facility loopback circuit on the port being tested:
a. In node view, double-click the controller card (15310-CL-CTX or CTX2500) to display the card
view.
b. Click the Maintenance > Optical > Loopback > Port tabs.
c. Choose OOS,MT from the Admin State column for the port being tested.
d. Choose Facility from the Loopback Type column for the port being tested.
e. Click Apply.
f. 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 3 Continue with the “Test the Facility Loopback Circuit” procedure on page 1-15.
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.
Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
facility loopback:
g. Click the Maintenance > Optical > Loopback > Port tabs.
h. Choose None from the Loopback Type column for the port being tested.
i. Choose the appropriate state (IS,AINS; OOS,DSBLD; or OOS,MT) from the Admin State column
for the port being tested.
j. Click Apply.
k. Click Yes in the confirmation dialog box.
l. Continue with the “1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port” procedure
on page 1-15.
1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port
The cross-connect loopback test occurs on the cross-connect portion of the controller card
(15310-CL-CTX or CTX2500) in a network circuit. Completing a successful cross-connect loopback
through the card isolates the possibility that the cross-connect is the cause of the faulty circuit.