Cisco ONS 15454 Troubleshooting Manual page 135

Chapter 1 General Troubleshooting
Create the Hairpin Circuit on the Destination-Node Port
Connect an Ethernet test set to the port you are testing:
Step 1
a.
b.
Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 2
Use CTC to set up the hairpin circuit on the test port:
Step 3
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
Confirm that the newly created circuit appears on the Circuits tab and that the Dir column describes it
Step 4
as a one-way circuit.
Complete the
Step 5
Test and Delete the Ethernet Hairpin 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 received by the test set. Look for errors or any other signal information that the
test set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary with the hairpin circuit. Clear the
Step 3
hairpin circuit:
a.
b.
c.
November 2009
If you just completed the
Port" procedure on page 1-87, leave the Ethernet test set hooked up to the Ethernet port in the
destination node.
If you are starting the current procedure without the Ethernet test set hooked up to the Ethernet port,
use appropriate cabling to connect the Ethernet test set to the port you are testing.
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type, such as STS, and number, such as 1.
Click Next.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as Hairpin1.
Choose the Size, such as STS-1.
Uncheck the Bidirectional check box. Leave the default values for State, SD Threshold, and
SF Threshold.
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. Leave Use Secondary Source unchecked.
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. Leave Use Secondary Destination unchecked.
Click Next.
In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish.
"Test and Delete the Ethernet Hairpin Circuit" procedure on page
Click the Circuits tab.
Choose the hairpin circuit being tested.
Click Delete.
1.5.8 Perform a Hairpin Test on a Destination-Node Ethernet Port
"1.5.7 Perform a Terminal Loopback on a Destination-Node Ethernet
Cisco ONS 15454 Troubleshooting Guide, R8.5
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