Cisco Systems ONS 15310-CL, ONS 15310-MA 1.6.5 Perform a Facility Loopback on a Destination-Node Ethernet Port

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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter1 General Troubleshooting
1.6.5 Perform a Facility Loopback on a Destination-Node E thernet Port
Caution Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. Refer to the procedures in the
“2.10.1 Protection Switching, Lock Initiation, and Clearing” section on page2-147. For more
information, refer to the “Maintain the Node” chapter in the Cisco ONS 15310-CL and
Cisco ONS 15310-MA Procedure Guide.
Step2 Resend test traffic on the loopback circuit with a known-good card.
Step3 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).
Step4 Complete the “Physically Replace a Card” procedure on page2-154 for the defective card.
Step5 Clear the terminal loopback on the port:
a. Double-click the source-node 15310-CL-CTX or CTX2500 with 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; OOS,DSBLD; OOS,MT) in the Admin State column for the port
being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step6 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. Do not check any check boxes.
Step7 Complete the “1.6.5 Perform a Facility Loopback on a Destination-Node Ethernet Port” procedure on
page 1-39.
1.6.5 Perform a Facility Loopback on a Destination-Node Ethernet Port
You perform a facility loopback test at the destination port to determine whether this local port is the
source of circuit trouble.
Caution Performing a loopback on an in-service circuit is service-affecting.
Note Facility loopbacks require on-site personnel.
Complete the “Create the Facility Loopback on a Destination-Node Ethernet Port” procedure on
page 1-40.