1-35
Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
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Chapter 1 General Troubleshooting
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
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 (1 800 553-2447).
Step 4
Complete the
“Physically Replace a Card” procedure on page 1-155
for the faulty card.
Step 5
Clear the facility loopback from the port:
a.
Double-click the card and click the
Maintenance > Optical > Loopback > Port
tabs.
b.
Choose
None
from the Loopback Type column for the port being tested.
c.
Choose the appropriate state (IS; OOS,DSBLD; OOS,MT) from the Admin State column for the port
being tested.
d.
Click
Apply
.
e.
Click
Yes
in the confirmation dialog box.
Step 6
Clear the facility 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 7
Complete the
“1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports” procedure on
page 1-35
.
1.6.4 Perform a Terminal Loopback on Intermediate-Node OC-N Ports
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the destination port is causing circuit trouble. To do this, you create a bidirectional circuit that
originates on the source-node Ethernet port and loops back on the intermediate-node port. You then
proceed with the terminal loopback test. If you successfully complete a terminal loopback on the node,
this node is excluded from possible sources of circuit trouble.
Caution
Performing a loopback on an in-service circuit is service-affecting.
Note
Terminal loopbacks require on-site personnel.
Complete the
“Create a Terminal Loopback on Intermediate-Node OC-N Ports” procedure on page 1-35
.
Create a Terminal Loopback on Intermediate-Node OC-N Ports
Step 1
Connect a test set to the 15310-CL-CTX or CTX2500 port you are testing:
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