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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.6.3 Perform a Facility Loopback on an Intermediate-Node OC-N Port
Test the Ethernet Card
Step 1 Complete the “Physically Replace a Card” procedure on page 2-154 for the suspected bad card and
replace it with a known-good one.
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 before testing the next segment of the network circuit path:
a. Double-click the CE100T-8 card with the terminal loopback in the source node.
b. Click the Maintenance > Loopback 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 before testing the next segment of the network circuit path:
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 “1.6.3 Perform a Facility Loopback on an Intermediate-Node OC-N Port” procedure on
page 1-33.
1.6.3 Perform a Facility Loopback on an Intermediate-Node OC-N Port
Performing the facility loopback test on an intermediate node OC-N port (which carries the Ethernet
circuit) isolates whether this node is causing circuit failure. Complete the “Create a Facility Loopback
on an Intermediate-Node OC-N Port” procedure on page 1-34.
Note The CE100T-8 Ethernet card only supports point-to-point configurations and is not directly implicated
in the intermediate node testing.