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1.5.4 Perform a Terminal (Inward) Loopback on Intermediate-Node MXP/TXP/FC_MR Ports
Complete the
Step 4
page
Test and Clear the MXP/TXP/FC_MR Terminal Loopback Circuit
Step 1
If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 2
Examine the test traffic being received by the test set. Look for errors or any other signal information
that the test set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary on the loopback circuit. Clear the
Step 3
terminal loopback from the port:
a.
b.
c.
d.
e.
f.
Step 4
Complete the
Test the MXP/TXP/FC_MR Card
Complete the
Step 1
and replace it with a known-good one.
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
Caution
perform an external switch if a switch has not already occurred. See the
Lock Initiation, and Clearing" section on page 2-260
refer to the Cisco ONS 15454 SDH Procedure Guide Chapter 15, "Maintain the Node."
Resend test traffic on the loopback circuit with a known-good card.
Step 2
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 RMA process. Log into the Cisco Technical Support Website at
http://www.cisco.com/techsupport for more information or log into
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml to obtain a directory of toll-free Cisco
TAC numbers for your country.
Complete the
Step 4
Clear the terminal loopback on the port:
Step 5
a.
b.
c.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-90
"Test and Clear the MXP/TXP/FC_MR Terminal Loopback Circuit" procedure on
1-90.
Double-click the intermediate-node card with the terminal loopback to display the card view.
Click the Maintenance > Loopback tab.
Select None from the Loopback Type column for the port being tested.
Select the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) in the
Admin State column for the port being tested.
Click Apply.
Click Yes in the confirmation dialog box.
"Test the MXP/TXP/FC_MR Card" procedure on page
"Physically Replace a Traffic Card" procedure on page 2-271
"Physically Replace a Traffic Card" procedure on page 2-271
Double-click the source-node card with the terminal loopback.
Click the Maintenance > Loopback tab.
Select None from the Loopback Type column for the port being tested.
Chapter 1
1-90.
for the suspected bad card
"2.10.2 Protection Switching,
for basic instructions. For detailed information,
for the defective card.
General Troubleshooting
July 2005
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