Cisco ONS 15454 Troubleshooting Manual page 128

1.5.6 Perform a Facility Loopback on a Destination-Node Ethernet Port
Step 5 Clear the terminal loopback on the port:
a.
b.
c.
d.
e.
f.
Clear the terminal loopback circuit:
Step 6
a.
b.
c.
d.
Complete the
Step 7
page
1.5.6 Perform a Facility Loopback on a Destination-Node Ethernet 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
Ethernet port.
Figure 1-35 Facility Loopback on a Destination-Node Ethernet Port
ONS Node
Ethenet
Test Set
Performing a loopback on an in-service circuit is service-affecting.
Caution
Facility loopbacks require on-site personnel.
Note
Complete the
page
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-84
Double-click the source-node card with the terminal loopback.
Click the Maintenance > Loopback tabs.
Select None from the Loopback Type column for the port being tested.
Select the appropriate state (IS; OOS,DSBLD; OOS,MT) in the Admin State column for the port
being tested.
Click Apply.
Click Yes in the confirmation dialog box.
Click the Circuits tab.
Choose the loopback circuit being tested.
Click Delete.
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
"1.5.6 Perform a Facility Loopback on a Destination-Node Ethernet Port" procedure on
1-84.
Source
XC Ethernet
"Create the Facility Loopback on a Destination-Node Ethernet Port" procedure on
1-85.
Figure 1-35 shows a facility loopback being performed on an
Intermediate
ONS Node
Ethernet XC Ethernet
Chapter 1 General Troubleshooting
Destination
ONS Node
Ethernet XC Ethernet
November 2009