Create The Hairpin Circuit On The Destination Node Port - Cisco ONS 15454 Troubleshooting Manual

1.3.6 Perform a Hairpin Test on a Destination Node Port (East to West)

Create the Hairpin Circuit on the Destination Node Port

Connect an electrical test set to the port you are testing:
Step 1
a.
b.
c.
Step 2 Use CTC to set up the hairpin circuit on the test port:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it
Step 3
as a one-way circuit.
Complete the
Step 4
Test and Delete the Hairpin Circuit
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Examine the test traffic received by the test set. Look for errors or any other signal information that the
Step 2
test set is capable of indicating.
Step 3 If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the
hairpin circuit:
a.
b.
c.
d.
e.
Cisco ONS 15454 Troubleshooting Guide, R4.6
1-26
If you just completed the "Perform a Facility (Line) Loopback on a Source DS-N Port (West to
East)" procedure on page
destination node.
If you are starting the current procedure without the electrical test set hooked up to the DS-N port,
use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the DSx panel
or the EIA connectors for the port you are testing. The Tx and Rx terminals connect to the same port.
Adjust the test set accordingly.
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type and size, such as an STS-1.
Click Next.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
"Hairpin1."
Uncheck the Bidirectional check box.
Click Next.
In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and STS (or VT)
where the test set is connected.
Click Next.
In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and STS (or VT)
used for the source dialog box.
Click Finish.
"Test and Delete the Hairpin Circuit" procedure on page
Click the Circuits tab.
Choose the hairpin circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box.
Confirm that the hairpin circuit is deleted form the Circuits tab list.
1-8, leave the electrical test set hooked up to the DS-N port in the
Chapter 1 General Troubleshooting
1-13.
November 2004