Cisco Cisco ONS 15600 SDH, Руководство по устранению неисправностей

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1-24
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.6 Perform a Facility Loopback or Payload Loopback on a Destination-Node Optical Port
f.
Click Next .
g. In the Circuit Creation source dialog box, select the same Node, card Slot, Port, and VC where the
test set is connected.
h.
Click Next .
i. In the Circuit Creation destination dialog box, use the same Node, card Slot, Port, and VC used for
the source dialog box.
j.
Click Next .
k. In the Circuit Creation circuit routing preferences dialog box, leave all defaults. Click Finish .
Step 4
Confirm that the newly created circuit appears on the Circuits tab list as a two-way circuit.
Note
It is normal for the “LPBKFACILITY (STMN)” condition on page 2-88 to appear during a
loopback setup. The condition clears when you remove the loopback.
Step 5
Create the facility loopback on the destination port being tested:
a. Go to the node view of the destination node:
•
Choose View > Go To Other Node from the menu bar.
• Choose the node from the drop-down list in the Select Node dialog box and click OK .
b.
In node view, double-click the card that requires the loopback.
c.
Click the Maintenance > Loopback > Port tabs (or Maintenance > Optical > Loopback > Port
tabs).
d.
Select Locked,maintenance from the Admin State column. If multiple ports are available, select
the row appropriate for the desired port.
e. For an ASAP card or STM-16 card, select Facility from the Loopback Type column. For an STM-64
card, select Payload . If multiple ports are available, select the row appropriate for the desired port.
f.
Click Apply .
g. Click Yes in the confirmation dialog box.
Step 6
Complete the “Test and Clear the Optical Facility Loopback or Payload Loopback Circuit” procedure on
page 1-24 .
Test and Clear the Optical Facility Loopback or Payload Loopback Circuit
Step 1
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2 Examine the traffic 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 with the facility loopback. Clear the
facility loopback from the port:
a. Click the Maintenance > Loopback > Port tabs (or Maintenance > Optical > Loopback > Port
tabs).
b.
Choose None from the Loopback Type column for the port being tested.