1-18
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.4 Perform a Facility Loopback or Payload Loopback on an Intermediate-Node Optical Port
b.
In node view, double-click the intermediate-node 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 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.
f.
Click
Apply
.
g.
Click
Yes
in the confirmation dialog box.
Step 6
Complete the
“Test and Clear the Facility Loopback or Payload Loopback Circuit” procedure on
Test and Clear the 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.
c.
Choose the appropriate state (
Unlocked
;
Locked,disabled
;
Locked,maintenance
;
Unlocked,automaticInservice
) from the Admin State column for the port being tested.
d.
Click
Apply
.
e.
Click
Yes
in the confirmation dialog box.
Step 4
Clear the loopback circuit:
a.
Click the
Circuits
tab.
b.
Choose the loopback circuit being tested.
c.
Click
Delete
.
d.
Click
Yes
in the Delete Circuits dialog box. Do not check any check boxes.
Step 5
Complete the
“Test the Optical Card” procedure on page 1-18
Test the Optical Card
Step 1
Complete the
“Replace an I/O Card” procedure on page 2-134
for the suspected bad STM-N or ASAP
card and replace it with a known-good one.
Summary of Contents for Cisco ONS 15600 SDH
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