Cisco ONS 15454 DWDM Manual page 12

1.2.2 Perform a Terminal Loopback on a Source-Node MXP or TXP Port
b.
Adjust the test set accordingly. (Refer to manufacturer instructions for test set use.)
Step 2
Step 3 In node view (single-shelf mode) or shelf view (multishelf mode), double-click the card that requires the
loopback.
Click the Maintenance > Loopback tabs.
Step 4
Select OOS,MT (or locked,maintenance) from the Admin State column. If this is a multiport card,
Step 5
select the row appropriate for the desired port.
Select Terminal (Inward) from the Loopback Type column. If this is a multiport card, select the row
Step 6
appropriate for the desired port.
Click Apply.
Step 7
Click Yes in the confirmation dialog box.
Step 8
Complete the
Step 9
page
Test and Clear the MXP or TXP Port 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 no errors, 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.
Complete the
Step 4
Test the MXP or TXP Card
Complete the
Step 1
replace it with a known-good one.
Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
1-12
If you are starting the current procedure without the optical test set hooked up to the source port,
use appropriate cabling to attach the Tx and Rx terminals of the optical test set to the port you are
testing. Both Tx and Rx connect to the same port.
"Test and Clear the MXP or TXP Port Terminal Loopback Circuit" procedure on
1-12.
Double-click the card in the source node with the terminal loopback.
Click the Maintenance > Loopback tabs.
Select None from the Loopback Type column for the port being tested.
Choose the appropriate state to place the port in service, out of service and disabled, out of service
for maintenance, or automatically in service from the Admin State column for the port being tested.
Click Apply.
Click Yes in the confirmation dialog box.
"Test the MXP or TXP Card" procedure on page
"Physically Replace a Card" procedure on page 2-172
Chapter 1 General Troubleshooting
1-12.
for the suspected bad card and
78-17742-02