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1.4.3 Perform a Facility (Line) Loopback on an Intermediate-Node Ethernet Port
d.
Complete the
Step 7
procedure on page
1.4.3 Perform a Facility (Line) Loopback on an Intermediate-Node Ethernet Port
Performing the facility (line) loopback test on an intermediate port isolates whether this node is causing
circuit failure. It is shown in
Figure 1-30
Facility (Line) 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
Complete the
page
Create a Facility (Line) Loopback on an Intermediate-Node Ethernet Port
Connect an optical test set to the port you are testing:
Step 1
Note
a.
b.
Step 2
Adjust the test set accordingly.
Use CTC to set up the facility (line) loopback on the test port:
Step 3
a.
b.
c.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-68
Click Yes in the Delete Circuits dialog box. Do not check any check boxes.
"1.4.3 Perform a Facility (Line) Loopback on an Intermediate-Node Ethernet Port"
1-68.
Figure
XC
Ethernet
"Create a Facility (Line) Loopback on an Intermediate-Node Ethernet Port" procedure on
1-68.
Refer to the manufacturer's instructions for detailed information about connection and setup of
the optical test set.
If you just completed the
"1.4.2 Perform a Terminal (Inward) Loopback on a Source-Node Ethernet
Port" procedure on page
1-64, leave the optical test set hooked up to the source-node port.
If you are starting the current procedure without the optical test set hooked up to the source port
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.
In node view, click the Circuits tab and click Create.
In the Circuit Creation dialog box, choose the type, such as VC_HO, and number, such as 1.
Click Next.
1-30.
Intermediate
ONS Node
Ethernet
XC
Ethernet
Chapter 1
General Troubleshooting
Destination
ONS Node
Ethernet
XC
Ethernet
July 2005
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