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Chapter 1
General Troubleshooting
Clear the terminal loopback circuit:
Step 4
a.
b.
c.
d.
The entire circuit path has now passed its comprehensive series of loopback tests. This circuit qualifies
Step 5
to carry live traffic. If the test set indicates a faulty circuit, the problem might be a faulty card.
Complete the
Step 6
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.
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.
Complete the
Step 4
Clear the terminal loopback on the port:
Step 5
a.
b.
c.
d.
e.
f.
Clear the terminal loopback circuit:
Step 6
a.
b.
c.
d.
July 2005
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.
"Test the Optical Card" procedure on page
"Physically Replace a Traffic Card" procedure on page 2-271
"Physically Replace a Traffic Card" procedure on page 2-271
Double-click the source-node card with the terminal loopback.
Click the Maintenance > Loopback > Port tabs.
Select None from the Loopback Type column for the port being tested.
Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in 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
1-61.
for basic instructions. For detailed information,
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
for the suspected bad card
"2.10.2 Protection Switching,
for the defective card.
1-61
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