Cisco Cisco ONS 15600 SDH, Troubleshooting Manual

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Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.3.6 Perform a Terminal Loopback on a Destination-Node Ethernet Port
Figure 1-17 Terminal Loopback on a Destination-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 the Terminal Loopback on a Destination-Node Ethernet Port” procedure on
page 1-45 .
Create the Terminal Loopback on a Destination-Node Ethernet Port
Step 1 Connect an optical test set to the destination node ASAP card Ethernet port you are testing:
Note For specific procedures to use the test set equipment, consult the manufacturer.
a. If you just completed the “1.3.5 Perform a Facility Loopback on a Destination-Node Ethernet Port”
procedure on page 1-41 for an ASAP card Ethernet port, leave the optical test set hooked up to the
source port.
b.
If you are starting the current procedure without the optical test set hooked up to the source 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
Use CTC to set up the terminal loopback on the test port:
a. In node view, click the Circuits tab and click Create .
b.
In the Circuit Creation dialog box, choose the type, such as VC_HO_PATH_CIRCUIT, and circuit
number, such as 1.
c. Click Next .
d.
In the next Circuit Creation dialog box, give the circuit an easily identifiable name such as
Eth1toEth6.
e. Leave the Bidirectional check box checked.
f.
Click Next .
g. In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and VC where the
test set is connected.
h.
Click Next .
Destination
ONS Node
Ethernet
Source
ONS Node
Intermediate
ONS Node
Test Set
Ethernet XC Ethernet Ethernet XC Ethernet Ethernet XC
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