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1.4.4 Perform a Terminal (Inward) Loopback on an Intermediate-Node Ethernet Port
Use CTC to set up the terminal (inward) loopback on the test port:
Step 3
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir
Step 4
column as a two-way circuit.
Note
Create the terminal loopback on the destination port being tested:
Step 5
a.
b.
c.
d.
e.
f.
g.
Complete the
Step 6
Test and Clear the Ethernet Terminal Loopback Circuit
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-72
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.
Click Next.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
G1K1toG1K4.
Leave the Bidirectional check box checked.
Click Next.
In the Circuit Creation source dialog box, select the same Node, Slot, Port, VC, and Tug where the
test set is connected.
Click Next.
In the Circuit Creation destination dialog box, use the same Node, Slot, Port, VC, and Tug used for
the source dialog box.
Click Next.
In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.
It is normal for the
"LPBKTERMINAL(G1000)" condition on page 2-173
loopback setup. The condition clears when you remove the loopback.
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.
•
In node view, double-click the card that requires the loopback.
Click the Maintenance > Loopback tab.
Select Locked,maintenance from the Admin State column. If this is a multiport card, select the row
appropriate for the desired port.
Select Terminal (Inward) from the Loopback Type column. If this is a multiport card, select the
row appropriate for the desired port.
Click Apply.
Click Yes in the confirmation dialog box.
"Test and Clear the Ethernet Terminal Loopback Circuit" procedure on page
Chapter 1
General Troubleshooting
to appear during a
1-72.
July 2005
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