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1.3.4 Perform a Facility (Line) Loopback on an Intermediate-Node Optical Port
k.
l.
m.
Confirm that the newly created circuit appears on the Circuits tab list and that it is described in the Dir
Step 4
column as a two-way circuit.
Note
Create the facility (line) loopback on the destination port being tested:
Step 5
a.
b.
c.
d.
e.
f.
g.
Complete the
Step 6
Test and Clear the 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 state on the port:
a.
b.
c.
d.
e.
Clear the facility (line) loopback circuit:
Step 4
a.
b.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-50
In the Circuit Creation circuit routing preferences dialog box, leave all defaults.
If the VC Optimization dialog box appears, leave all defaults.
Click Finish.
It is normal for a
"LPBKFACILITY (STM1E, STMN)" condition, page
clears when you remove the loopback.
Go to the node view of the intermediate node:
From the View menu choose Go To Other Node.
•
Choose the node from the drop-down list in the Select Node dialog box and click OK.
•
In node view, double-click the intermediate-node card that requires the loopback.
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 Facility (Line) 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.
"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.
Chapter 1
General Troubleshooting
2-170. The condition
1-50.
July 2005
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