Perform A Terminal Loopback On Intermediate-Node Oc-N Ports; Create A Terminal Loopback On Intermediate-Node Oc-N Ports - Cisco ONS 15310-CL Troubleshooting Manual

Chapter 1 General Troubleshooting
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
Clear the facility loopback from the port:
Step 5
a.
b.
c.
d.
e.
Clear the facility loopback circuit:
Step 6
a.
b.
c.
d.
Complete the
Step 7
page

1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports

In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the destination port is causing circuit trouble. To do this, you create a bidirectional circuit that
originates on the source-node Ethernet port and loops back on the intermediate-node port. You then
proceed with the terminal loopback test. If you successfully complete a terminal loopback on the node,
this node is excluded from possible sources of circuit trouble.
Performing a loopback on an in-service circuit is service-affecting.
Caution
Terminal loopbacks require on-site personnel.
Note
Complete the

Create a Terminal Loopback on Intermediate-Node OC-N Ports

Connect a test set to the 15310-CL-CTX or CTX2500 port you are testing:
Step 1
78-17235-01
"Physically Replace a Card" procedure on page 1-155
Double-click the card and click the Maintenance > Optical > Loopback > Port tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.
Click Apply.
Click Yes in the confirmation dialog box.
Click the Circuits tab.
Choose the loopback circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
"1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports" procedure on
1-35.
"Create a Terminal Loopback on Intermediate-Node OC-N Ports" procedure on page
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
for the faulty card.
1-35.
1-35