Figure 1-21 Facility Loopback On A Circuit Source Oc-N Port - Cisco ONS 15454 Troubleshooting Manual

1.4.1 Perform a Facility Loopback on a Source-Node Optical Port
1.4.1 Perform a Facility Loopback on a Source-Node Optical Port
The facility loopback test is performed on the node source port in the network circuit. In the testing
situation used in this example, the source OC-N port in the source node. Completing a successful facility
loopback on this port isolates the OC-N port as a possible failure point.
of a facility loopback on a circuit source OC-N port.
Figure 1-21 Facility Loopback on a Circuit Source OC-N Port
Source
ONS Node
OC-N
Test Set
Performing a loopback on an in-service circuit is service-affecting.
Caution
Facility loopbacks require on-site personnel.
Note
Complete the
Create the Facility Loopback on the Source Optical 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.)
In CTC node view, double-click the card to open the card view.
Step 2
Click the Maintenance > Loopback > Port tabs.
Step 3
Choose OOS,MT from the Admin State column for the port being tested. If this is a multiport card,
Step 4
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 5
select the appropriate row for the desired port.
Step 6 Click Apply.
Step 7 Click Yes in the confirmation dialog box.
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-48
XC OC-N
"Create the Facility Loopback on the Source Optical Port" procedure on page
For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
Intermediate
ONS Node
OC-N XC OC-N
Chapter 1 General Troubleshooting
Figure 1-21 shows an example
Destination
ONS Node
OC-N XC OC-N
1-48.
November 2009