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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.6.6 Perform a Terminal Loopback on a Destination-Node Ethernet Port
Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support (1 800 553-2447).
Step 4 Complete the “Physically Replace a Card” procedure on page 2-154 for the faulty card.
Step 5 Clear the facility loopback on the port:
a. Double-click the CE100T-8 card and click the Maintenance > Loopback tabs.
b. Choose None from the Loopback Type column for the port being tested.
c. Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.
d. Click Apply.
e. Click Yes in the confirmation dialog box.
Step 6 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. Do not check any check boxes.
Step 7 Complete the “1.6.6 Perform a Terminal Loopback on a Destination-Node Ethernet Port” procedure on
page 1-42.
1.6.6 Perform a Terminal Loopback on a Destination-Node Ethernet Port
The terminal loopback at the destination-node port is the final local hardware error elimination in the
circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit
is good up to the destination port.
Caution Performing a loopback on an in-service circuit is service-affecting.
Note Terminal loopbacks require on-site personnel.
Complete the “Create the Terminal Loopback on a Destination-Node Ethernet Port” procedure on
page 1-42.
Create the Terminal Loopback on a Destination-Node Ethernet Port
Step 1 Connect a test set to the CE100T-8 port that you are testing:
Note For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
a. If you just completed the “1.6.5 Perform a Facility Loopback on a Destination-Node Ethernet Port”
procedure on page 1-39, leave the test set hooked up to the source port.