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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.6.5 Perform a Facility Loopback on a Destination-Node Ethernet 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 page 2-147. For more
information, refer to the “Maintain the Node” chapter in the Cisco ONS 15310-CL and
Cisco ONS 15310-MA Procedure Guide.
Step 2 Resend test traffic on the loopback circuit with a known-good card.
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 defective card.
Step 5 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.
Step 6 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.
Step 7 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.