Cisco ONS 15454 - 1.6.5 Perform a Facility Loopback on a Destination-Node FC_MR Port; Create the Facility Loopback on a Destination-Node FC_MR Port

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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 1 General Troubleshooting
1.6.5 Perform a Facility Loopback on a Destination-Node FC_MR Port
d. Select the appropriate state (IS; OOS,DSBLD; OOS,MT; IS,AINS) in the Admin State column for
the port being tested.
e. Click Apply.
f. Click Yes in the confirmation dialog box.
Step 6 Complete the “1.6.5 Perform a Facility Loopback on a Destination-Node FC_MR Port” procedure on
page 1-103.
1.6.5 Perform a Facility Loopback on a Destination-Node FC_MR Port
You perform a facility loopback test at the destination port to determine whether this local port is the
source of circuit trouble. The example in Figure 1-42 shows a facility loopback being performed on an
FC_MR port.
Figure 1-42 Facility Loopback on a Destination-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 the Facility Loopback on a Destination-Node FC_MR Port” procedure on
page 1-103.
Create the Facility Loopback on a Destination-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 “1.6.4 Create a Terminal Loopback on Intermediate-Node FC_MR Ports”
procedure on page 1-101, leave the optical test set hooked up to the source-node port.
Destination
ONS Node
MXP TXP
Source
ONS Node
Intermediate
ONS Node
Test Set
MXP TXP MXP TXP
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