Test And Clear The Facility Loopback Or Payload Loopback Circuit; Test The Optical Card - Cisco ONS 15600 SDH Troubleshooting Manual

1.2.4 Perform a Facility Loopback or Payload Loopback on an Intermediate-Node Optical Port
b.
c.
d.
e.
f.
g.
Complete the
Step 6
page

Test and Clear the Facility Loopback or Payload 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 from the port:
a.
b.
c.
d.
e.
Clear the loopback circuit:
Step 4
a.
b.
c.
d.
Complete the
Step 5

Test the Optical Card

Complete the
Step 1
card and replace it with a known-good one.
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
1-18
In node view, double-click the intermediate-node card that requires the loopback.
Click the Maintenance > Loopback > Port tabs (or Maintenance > Optical > Loopback > Port
tabs).
Select locked,maintenance from the Admin State column. If multiple ports are available, select the
row appropriate for the desired port.
For an STM-16 card or ASAP card optical port, 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.
Click Apply.
Click Yes in the confirmation dialog box.
"Test and Clear the Facility Loopback or Payload Loopback Circuit" procedure on
1-18.
Click the Maintenance > Loopback > Port tabs (or Maintenance > Optical > Loopback > Port
tabs).
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (Unlocked; Locked,disabled; Locked,maintenance;
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
"Replace an I/O Card" procedure on page 2-134
Chapter 1 General Troubleshooting
1-18.
for the suspected bad STM-N or ASAP
July 2010