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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.3.4 Create a Terminal Loopback on an Intermediate-Node Ethernet Port
e.
Click
Yes
in the confirmation dialog box.
Step 9
Clear the loopback circuit:
a.
Click the
Circuits
tab.
b.
Choose the loopback circuit being tested.
c.
Click
Delete
.
d.
Click
Yes
in the Delete Circuits dialog box. Do not check any check boxes.
Step 10
Complete the
“1.3.4 Create a Terminal Loopback on an Intermediate-Node Ethernet Port” procedure on
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
, the terminal loopback is performed on an intermediate Ethernet port in the circuit. You
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
Caution
Performing a loopback on an in-service circuit is service-affecting.
Note
Terminal loopbacks require on-site personnel.
Complete the
“Create a Terminal Loopback on an Intermediate-Node Ethernet Port” procedure on
Create a Terminal Loopback on an Intermediate-Node Ethernet Port
Step 1
Connect an optical test set to the intermediate node ASAP card Ethernet port you are testing:
Destination
ONS Node
Ethernet
Ethernet
XC
Source
ONS Node
Intermediate
ONS Node
Ethernet
Test Set
Ethernet
XC
Ethernet
Ethernet
XC
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Summary of Contents for Cisco ONS 15600 SDH
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