1-9
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
July 2010
Chapter 1 General Troubleshooting
1.2.1 Perform a Facility Loopback or Payload Loopback on a Source-Node Optical Port
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
loopback:
a.
Click the
Maintenance > Loopback > Port
(or
Maintenance > Optical > Loopback > Port)
tabs.
b.
Choose the appropriate state (
Unlocked
;
Locked,disabled
;
Locked,maintenance
;
Unlocked,automaticInservice
) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
c.
Click
Apply
.
d.
Click
Yes
in the confirmation dialog box.
Step 4
Complete the
“Test the Optical Card” procedure on page 1-9
Test the Optical Card
Step 1
Complete the
“Replace an I/O Card” procedure on page 2-134
for the suspected bad card and replace it
with a known-good one.
Caution
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. See the procedures in the
“2.8.2 Protection Switching, Lock Initiation, and Clearing” section on page 2-123
. For more
information, refer to the “Maintain the Node” chapter of the
Cisco ONS 15600 SDH Procedure Guide
.
Step 2
Resend test traffic on the loopback circuit with a known-good card installed.
Step 3
If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the returned materials authorization (RMA) process. Contact Cisco Technical
Support (1 800 553-2447).
Step 4
Complete the
“Replace an I/O Card” procedure on page 2-134
for the faulty card.
Step 5
Clear the facility loopback:
Step 6
If the test set indicates a good circuit, no further testing is necessary with the facility or payload
loopback. Clear the loopback:
a.
Click the
Maintenance > Loopback > Port
(or
Maintenance > Optical > Loopback > Port)
tabs.
b.
Choose the appropriate state (
Unlocked
;
Locked,disabled
;
Locked,maintenance
;
Unlocked,automaticInservice
) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
c.
Click
Apply
.
d.
Click
Yes
in the confirmation dialog box.
Содержание Cisco ONS 15600 SDH
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