Cisco ONS 15454 Troubleshooting Manual page 114

1.5.1 Perform a Facility Loopback on a Source-Node Ethernet Port
Performing a loopback on an in-service circuit is service-affecting.
Caution
Complete the
Create the Facility Loopback on the Source-Node Ethernet Port
Connect an optical test set to the port you are testing.
Step 1
Note
Use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing. The Tx and Rx terminals connect to the same port.
Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 2
In CTC node view, double-click the card to open the card view.
Step 3
Click the Maintenance > Loopback tabs.
Step 4
Choose OOS,MT from the Admin State column for the port being tested. If this is a multiport card,
Step 5
select the appropriate row for the desired port.
Choose Facility from the Loopback Type column for the port being tested. If this is a multiport card,
Step 6
select the appropriate row for the desired port.
Click Apply.
Step 7
Click Yes in the confirmation dialog box.
Step 8
Note
Complete the
Step 9
Test and Clear the Facility Loopback Circuit
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Examine the traffic received by the test set. Look for errors or any other signal information that the test
Step 2
set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
Step 3
facility loopback:
a.
b.
c.
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-70
"Create the Facility Loopback on the Source-Node Ethernet Port" procedure on page
For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
It is normal for the "LPBKFACILITY (G1000)" condition on page 2-172
loopback setup. The condition clears when you remove the loopback.
"Test and Clear the Facility Loopback Circuit" procedure on page
Click the Maintenance > Loopback tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.
Chapter 1 General Troubleshooting
to appear during
1-70.
November 2009
1-70.