Create A Terminal Loopback On An Intermediate-Node Ethernet Port; Figure 1-15 Terminal Loopback On An Intermediate-Node Ethernet Port - Cisco ONS 15600 SDH Troubleshooting Manual

1.3.4 Create a Terminal Loopback on an Intermediate-Node Ethernet Port

e.
Clear the loopback circuit:
Step 9
a.
b.
c.
d.
Complete the
Step 10
page
1.3.4 Create a Terminal Loopback on an Intermediate-Node Ethernet Port
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node ASAP
Ethernet port to isolate whether the destination port is causing circuit trouble. In the example situation
in Figure
first create a bidirectional circuit that originates on the source-node Ethernet port and loops back on the
intermediate-node port. You then proceed with the terminal loopback test. If you successfully complete
a terminal loopback on the node, this node is excluded from possible sources of circuit trouble.
Figure 1-15 Terminal Loopback on an Intermediate-Node Ethernet Port
Source
ONS Node
Ethernet
Test Set
Performing a loopback on an in-service circuit is service-affecting.
Caution
Terminal loopbacks require on-site personnel.
Note
Complete the
page
Create a Terminal Loopback on an Intermediate-Node Ethernet Port
Connect an optical test set to the intermediate node ASAP card Ethernet port you are testing:
Step 1
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
1-38
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.
"1.3.4 Create a Terminal Loopback on an Intermediate-Node Ethernet Port" procedure on
1-38.
1-15, the terminal loopback is performed on an intermediate Ethernet port in the circuit. You
XC Ethernet
"Create a Terminal Loopback on an Intermediate-Node Ethernet Port" procedure on
1-38.
Intermediate
ONS Node
Ethernet XC Ethernet
Chapter 1 General Troubleshooting
Destination
ONS Node
Ethernet XC Ethernet
July 2010