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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.5.8 Perform a Hairpin Test on a Destination-Node Ethernet Port
d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
e. Confirm that the hairpin circuit is deleted from the Circuits tab list.
Step 5 To confirm a defective original cross-connect card, complete the “Retest the Original Cross-Connect
Card” procedure on page 1-93.
Retest the Original Cross-Connect Card
Step 1 Initiate an external switching command (side switch) on the cross-connect cards:
a. Determine the standby cross-connect card. On both the physical node and the CTC node view
window, the standby cross-connect ACT/SBY LED is amber and the active card ACT/SBY LED is
green.
b. In node view, select the Maintenance > Cross-Connect > Cards tabs.
c. From the Cross-Connect Cards menu, choose Switch.
d. Click Yes in the Confirm Switch dialog box.
Note After the active cross-connect goes into standby mode, the original standby card becomes
active and its ACT/SBY LED turns green. The former active card becomes standby and its
ACT/SBY LED turns amber.
Step 2 Resend test traffic on the loopback circuit.
Step 3 If the test set indicates a faulty circuit, the problem is probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support at 1 800 553-2447 and
proceed to Step 4. If the test does not indicate a faulty circuit, proceed to Step 5.
Step 4 Complete the “Physically Replace an In-Service Cross-Connect Card” procedure on page 2-274 for the
defective cross-connect card.
Step 5 If the test set indicates a good circuit, the cross-connect card might have had a temporary problem that
was cleared by the side switch. Clear the hairpin circuit:
a. Click the Circuits tab.
b. Choose the hairpin circuit being tested.
c. Click Delete.
d. Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
e. Confirm that the hairpin circuit is deleted from the Circuits tab list.
The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies
to carry live traffic.
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