Cisco ONS 15454 - 1.6.3 Create a Facility Loopback on an Intermediate-Node FC_MR Port; Create a Facility Loopback on an Intermediate-Node FC_MR Port

1-99
Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.6.3 Create a Facility Loopback on an Intermediate-Node FC_MR Port
1.6.3 Create a Facility Loopback on an Intermediate-Node FC_MR Port
Performing the facility loopback test on an intermediate port determines whether this node is causing
circuit failure. In the example shown in Figure 1-40, the test is being performed on an intermediate
FC_MR port.
Figure 1-40 Facility Loopback on an Intermediate-Node FC_MR Port
Caution Performing a loopback on an in-service circuit is service-affecting.
Note Facility loopbacks require on-site personnel.
Complete the “Create a Facility Loopback on an Intermediate-Node FC_MR Port” procedure on
page 1-99.
Create a Facility Loopback on an Intermediate-Node FC_MR Port
Step 1 Connect an optical test set to the port you are testing:
Note For specific procedures to connect, set up, and use the test set equipment, consult the
manufacturer.
a. If you just completed the “1.6.2 Perform a Terminal Loopback on a Source-Node FC_MR Port”
procedure on page 1-96, leave the optical test set hooked up to the source-node port.
b. If you are starting the current procedure without the optical test set hooked up to the source port
port, use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you
are testing. Both Tx and Rx connect to the same port.
Step 2 Adjust the test set accordingly. (Refer to manufacturer instructions for test-set use.)
Step 3 In node view, double-click the intermediate-node card that requires the loopback.
Step 4 Click the Maintenance > Loopback tabs.
Step 5 Select OOS,MT from the Admin State column. If this is a multiport card, select the row appropriate for
the desired port.
Step 6 Select Facility from the Loopback Type column. If this is a multiport card, select the row appropriate
for the desired port.
Step 7 Click Apply.
Destination
ONS Node
OC-N FC_MRXC
Source
ONS Node
Intermediate
ONS Node
OC-N OC-NXCOC-N
Test Set
FC_MR XC
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