Cisco ONS 15454 - Test and Clear the Ethernet Terminal Loopback Circuit

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.5.2 Perform a Terminal Loopback on a Source-Node Ethernet Port
d. In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
G1K1toG1K2.
e. Leave the Bidirectional check box checked.
f. Click Next.
g. In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and STS (or VT)
where the test set is connected.
h. Click Next.
i. In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT)
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 “LPBKTERMINAL (G1000)” condition on page 2-176 to appear during a
loopback setup. The condition clears when you remove the loopback.
Step 5 Create the terminal loopback on the destination port being tested:
a. In node view, double-click the card that requires the loopback, such as the destination G-Series card
in the source node.
b. Click the Maintenance > Loopback tabs.
c. Select OOS,MT from the Admin State column. If this is a multiport card, select the row appropriate
for the desired port.
d. Select Terminal from the Loopback Type column. If this is a multiport card, select the row
appropriate for the desired port.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 6 Complete the “Test and Clear the Ethernet Terminal Loopback Circuit” procedure on page 1-73.
Test and Clear the Ethernet Terminal Loopback Circuit
Step 1 If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the test traffic being 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 on the loopback circuit. Clear the
terminal loopback state on the port:
a. Double-click the card in the source node with the terminal loopback.
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.