Cisco ONS 15454 SDH - Test and Clear the Ethernet Facility (Line) Loopback Circuit

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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.4.3 Perform a Facility (Line) Loopback on an Intermediate-Node Ethernet Port
d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
G1KtoG1K3.
e. Leave the Bidirectional check box checked.
f. Click Next.
g. In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the
test set is connected.
h. Click Next.
i. In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for
the source dialog box.
j. Click Next.
k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.
Step 4 Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.
Note It is normal for the “LPBKFACILITY (G1000)” condition on page 2-169 to appear during a
loopback setup. The condition clears when you remove the loopback.
Step 5 Create the facility (line) loopback on the destination port being tested:
a. Go to the node view of the intermediate node:
• Choose View > Go To Other Node from the menu bar.
• Choose the node from the drop-down list in the Select Node dialog box and click OK.
b. In node view, double-click the intermediate-node card that requires the loopback.
c. Click the Maintenance > Loopback tab.
d. Select OOS,MT from the Admin State column. If this is a multiport card, select the row appropriate
for the desired port.
e. Select Facility (Line) from the Loopback Type column. If this is a multiport card, select the row
appropriate for the desired port.
f. Click Apply.
g. Click Yes in the confirmation dialog box.
Step 6 Complete the “Test and Clear the Ethernet Facility (Line) Loopback Circuit” procedure on page 1-69.
Test and Clear the Ethernet Facility (Line) Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the traffic received by the test set. Look for errors or any other signal information that the test
set is capable of indicating.
Step 3 If the test set indicates a good circuit, no further testing is necessary with the facility (line) loopback.
Clear the facility loopback from the port:
a. Click the Maintenance > Loopback tab.
b. Choose None from the Loopback Type column for the port being tested.