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1.3.7 Perform a Terminal Loopback on a Destination-Node Optical Port
Test the Optical Card
Complete the
Step 1
and replace it with a known-good one.
Caution
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. See the
Lock Initiation, and Clearing" section on page 2-260
refer to the Cisco ONS 15454 SDH Procedure Guide Chapter 15, "Maintain the Node."
Resend test traffic on the loopback circuit with a known-good card installed.
Step 2
If the test set indicates a good circuit, the problem is probably the defective card. Return the defective
Step 3
card to Cisco through the RMA process. Log into the Cisco Technical Support Website at
http://www.cisco.com/techsupport for more information or log into
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco
TAC numbers for your country.
Step 4
Complete the
Step 5
Clear the facility (line) loopback on the port:
a.
b.
c.
d.
e.
Clear the facility loopback circuit:
Step 6
a.
b.
c.
d.
Complete the
Step 7
page
1.3.7 Perform a Terminal Loopback on a Destination-Node Optical Port
The terminal loopback at the destination-node port is the final local hardware error elimination in the
circuit troubleshooting process. If this test is completed successfully, you have verified that the circuit
is good up to the destination port. The example in
intermediate-node destination STM-N port.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-58
"Physically Replace a Traffic Card" procedure on page 2-271
"Physically Replace a Traffic Card" procedure on page 2-271
Click the Maintenance > Loopback > Port tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from 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.
"1.3.7 Perform a Terminal Loopback on a Destination-Node Optical Port" procedure on
1-58.
Chapter 1
for the suspected bad card
"2.10.2 Protection Switching,
for basic instructions. For detailed information,
for the faulty card.
Figure 1-27
shows a terminal loopback on an
General Troubleshooting
July 2005
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