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Chapter 1
General Troubleshooting
Complete the
Step 14
page
Test and Clear the Destination Electrical Port Terminal Loopback Circuit
Step 1
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2
Examine the test traffic being received by the test set. Look for errors or any other signal information
that the test set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit.
Step 3
Double-click the electrical card in the destination node with the terminal loopback.
Click the Maintenance > Loopback tabs.
Step 4
Select None from the Loopback Type column for the port being tested.
Step 5
Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the
Step 6
Admin State column for the port being tested.
Click Apply.
Step 7
Click Yes in the confirmation dialog box.
Step 8
Clear the terminal loopback circuit:
Step 9
a.
b.
c.
d.
Complete the
Step 10
Test the Destination Electrical Card
Replace the suspected bad card with a known-good card. Complete the
Step 1
Card" procedure on page 2-271
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
Caution
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.
Step 3
a.
July 2005
1.2.4 Perform a Terminal (Inward) Loopback on a Destination Electrical Port (West to East)
"Test and Clear the Destination Electrical Port Terminal Loopback Circuit" procedure on
1-23.
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 Destination Electrical Card" procedure on page
Return the defective 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.
for the suspected bad card and replace it with a known-good one.
for basic instructions. For detailed information,
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-23.
"Physically Replace a Traffic
"2.10.2 Protection Switching,
1-23
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