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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.3.4 Perform a Facility Loopback on an Intermediate-Node OC-N Port
d. Select Terminal from the Loopback Type column.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 5 Continue with the “Test the Terminal Loopback Circuit” procedure on page 1-18.
Test the 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.
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit:
Step 3 Clear the terminal loopback:
a. Double-click the card in the source node having the terminal loopback.
b. Click the Maintenance > Optical > Loopback > Port tabs.
c. Select None from the Loopback Type column for the port being tested.
d. Select the appropriate state (IS,AINS; OOS,DSBLD; or OOS,MT) in the Admin State column for
the port being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 4 Clear the terminal 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.
Step 5 If the test set indicates a faulty circuit, the problem might be a faulty port. Continue with the
“1.3.4 Perform a Facility Loopback on an Intermediate-Node OC-N Port” procedure on page 1-18.
1.3.4 Perform a Facility Loopback on an Intermediate-Node OC-N Port
The facility loopback test is performed on the node source port in the network circuit, in this example,
the source OC-N port in the intermediate node. Completing a successful facility loopback on this port
isolates the OC-N port as a possible failure point.
Caution Performing a loopback on an in-service circuit is service-affecting.