Perform A Cross-Connect Loopback On The Source Oc-N Port; Create The Cross-Connect Loopback On The Source Oc-N Port; Test The Cross-Connect Loopback Circuit - Cisco ONS 15310-CL Troubleshooting Manual

Chapter 1 General Troubleshooting

1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port

The cross-connect loopback test occurs on the cross-connect portion of the controller card
(15310-CL-CTX or CTX2500) in a network circuit. Completing a successful cross-connect loopback
through the card isolates the possibility that the cross-connect is the cause of the faulty circuit.

Create the Cross-Connect Loopback on the Source OC-N Port

Connect an optical test set to the port you are testing:
Step 1
a.
b.
c.
Use CTC to put the circuit being tested out of service:
Step 2
a.
b.
c.
d.
e.
f.
Use CTC to set up the cross-connect loopback on the circuit being tested:
Step 3
a.
b.
c.
d.
e.
Continue with the
Step 4

Test the Cross-Connect Loopback 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 cross-connect. Clear the
cross-connect loopback:
a.
b.
78-17235-01
If you just completed the "1.3.1 Perform a Facility Loopback on a Source-Node OC-N Port"
procedure on page 1-13, leave the optical test set connected to the OC-N port in the source node.
If you are starting the current procedure without the optical test set connected to the OC-N port, use
appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing.
Adjust the test set accordingly.
In node view, click the Circuits tab.
Click the circuit and then click Edit.
In the Edit Circuit dialog box, click the State tab.
Choose OOS-MT from the Target Circuit Admin State drop-down list.
Click Apply.
Click Yes in the confirmation dialog box.
In node view, double-click the 15310-CL-CTX or CTX2500 to open the card view.
For the OC-N port, click the Maintenance > Optical > Loopback > SONET STS tabs.
Click the check box in the XC Loopback column for the port being tested.
Click Apply.
Click Yes in the confirmation dialog box.
"Test the Cross-Connect Loopback Circuit" procedure on page
In card view, click the Maintenance > Optical > Loopback > SONET STS tabs.
Uncheck the check box in the XC Loopback column for the circuit being tested.
1.3.2 Perform a Cross-Connect Loopback on the Source OC-N Port
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
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