Cisco ONS 15454 Troubleshooting Manual page 96

1.4.2 Perform a Terminal Loopback on a Source-Node Optical Port
Step 5 Complete the
Test and Clear the Terminal Loopback Circuit
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Examine the test traffic being received by the test set. Look for errors or any other signal information
Step 2
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. 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
Step 1 Complete the
and replace it with a known-good one.
Resend test traffic on the loopback circuit with a known-good card.
Step 2
Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the RMA process. Contact Cisco Technical Support at 1 800 553-2447.
Complete the
Step 4
Clear the terminal loopback on the port before testing the next segment of the network circuit path:
Step 5
a.
b.
c.
d.
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-52
"Test and Clear the Terminal Loopback Circuit" procedure on page
Double-click the card in the source node 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 (IS; OOS,DSBLD; OOS,MT; IS,AINS) 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 2-273
"Physically Replace a Traffic Card" procedure on page 2-273
Double-click the card in the source node 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 (IS; OOS,DSBLD; OOS,MT; IS,AINS) in the Admin State column for
the port being tested.
Chapter 1 General Troubleshooting
1-52.
1-52.
for the suspected bad card
for the defective card.
November 2009