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Chapter 1
General Troubleshooting
b.
c.
d.
e.
f.
g.
Note
Step 6
Complete the
Test the Optical Facility (Line) Loopback Circuit
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Examine the traffic received by the test set. Look for errors or any other signal information that the test
Step 2
set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
Step 3
facility loopback on the port:
a.
b.
c.
d.
e.
Clear the facility loopback circuit:
Step 4
a.
b.
c.
d.
Complete the
Step 5
July 2005
In node view, double-click the card that requires the loopback, such as the destination-node optical,
G-Series, MXP, or TXP card.
Click the Maintenance > Loopback > Port tabs.
Select Locked,maintenance from the Admin State column. If this is a multiport card, 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 appropriate for the desired port.
Click Apply.
Click Yes in the confirmation dialog box.
It is normal for the
"LPBKFACILITY (STM1E, STMN)" condition, page 2-170
a loopback setup. The condition clears when you remove the loopback.
"Test and Clear the Facility (Line) Loopback Circuit" procedure on page
Click the Maintenance > Loopback > Port tabs.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from 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
1.3.6 Perform a Facility (Line) Loopback on a Destination-Node Optical Port
1-58.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
to appear during
1-50.
1-57
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