1-37
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
78-17235-01
Chapter 1 General Troubleshooting
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
f.
Click
Apply
.
g.
Click
Yes
in the confirmation dialog box.
Step 6
Complete the
“Test and Clear the OC-N Terminal Loopback Circuit” procedure on page 1-37
.
Test and Clear the OC-N 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.
Step 3
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the
terminal loopback from the port:
a.
Double-click the intermediate-node 15310-CL-CTX or CTX2500 with the terminal loopback to
display the card view.
b.
Click the
Maintenance > Optical > Loopback > Port
tabs.
c.
Select
None
from the Loopback Type column for the port being tested.
d.
Select the appropriate state (IS; OOS,DSBLD; OOS,MT) in the Admin State column for the port
being tested.
e.
Click
Apply
.
f.
Click
Yes
in the confirmation dialog box.
Step 4
Clear the terminal loopback circuit:
a.
Click the
Circuits
tab.
b.
Choose the loopback circuit being tested.
c.
Click
Delete
.
d.
Click
Yes
in the Delete Circuits dialog box. Do not check any check boxes.
Step 5
Complete the
“Test the OC-N Card” procedure on page 1-37
.
Test the OC-N Card
Step 1
Complete the
“Physically Replace a Card” procedure on page 1-155
for the suspected bad card 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. Refer to the procedures in the
“1.10.1 Protection Switching, Lock Initiation, and Clearing” section on page 1-148
. For more
information, refer to the “Maintain the Node” chapter in the
Cisco ONS 15310-CL and
Cisco ONS 15310-MA Procedure Guide
.
Step 2
Resend test traffic on the loopback circuit with a known-good card.
