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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.5.7 Perform a Terminal Loopback on a Destination-Node Ethernet Port
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 “1.5.7 Perform a Terminal Loopback on a Destination-Node Ethernet Port” procedure on
page 1-87.
1.5.7 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. The example in Figure 1-29 shows a terminal loopback on an
intermediate-node destination Ethernet port.
Figure 1-36 Terminal Loopback on a Destination-Node Ethernet 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 1-87.
Create the Terminal Loopback on a Destination-Node Ethernet Port
Step 1 Connect an optical test set to the port you are testing:
Destination
ONS Node
Ethernet
Source
ONS Node
Intermediate
ONS Node
Test Set
Ethernet XC Ethernet Ethernet XC Ethernet Ethernet XC
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