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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.5.4 Create a Facility Loopback on an Intermediate-Node Ethernet Port
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 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.
Step 6 Complete the “1.5.4 Create a Facility Loopback on an Intermediate-Node Ethernet Port” procedure on
page 1-78.
1.5.4 Create a Facility Loopback on an Intermediate-Node Ethernet Port
Performing the facility loopback test on an intermediate port isolates whether this node is causing circuit
failure. It is shown in Figure 1-33.
Figure 1-33 Facility Loopback on an Intermediate-Node Ethernet Port
Caution Performing a loopback on an in-service circuit is service-affecting.
Note Facility loopbacks require on-site personnel.
Complete the “Create a Facility Loopback on an Intermediate-Node Ethernet Port” procedure on
page 1-79.
Destination
ONS Node
Ethernet EthernetXC
Source
ONS Node
Intermediate
ONS Node
Ethernet EthernetXC
Test Set
Ethernet XC Ethernet
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