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1.3.2 Perform a Terminal (Inward) Loopback on a Source-Node Optical Port
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the
Step 3
terminal loopback state on the port:
a.
b.
c.
d.
e.
f.
Clear the terminal loopback circuit:
Step 4
a.
b.
c.
d.
Complete the
Step 5
Test the Optical Card
Complete the
Step 1
and replace it with a known-good one.
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. 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 terminal loopback on the source card port before testing the next segment of the network path:
a.
b.
c.
d.
e.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-44
Double-click the card in the source node with the terminal loopback.
Click the Maintenance > Loopback > Port tabs.
Click 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.
"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.
Chapter 1
1-44.
for the suspected bad card
"2.10.2 Protection Switching,
for basic instructions. For detailed information,
for the faulty card.
General Troubleshooting
July 2005
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