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1.5.4 Perform a Terminal (Inward) Loopback on Intermediate-Node MXP/TXP/FC_MR Ports
Test the MXP/TXP/FC_MR Card
Complete the
Step 1
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
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 installed.
Step 2
If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
Step 3
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.
Step 4
Complete the
Step 5
Clear the facility (line) loopback from the port:
a.
b.
c.
d.
e.
Complete the
Step 6
Ports" procedure on page
1.5.4 Perform a Terminal (Inward) Loopback on Intermediate-Node
MXP/TXP/FC_MR Ports
In the next troubleshooting test, you perform a terminal loopback on the intermediate-node port to isolate
whether the destination port is causing circuit trouble. In the example situation in
terminal loopback is performed on an intermediate MXP/TXP/FC_MR port in the circuit. If you
successfully complete a terminal loopback on the node, this node is excluded from possible sources of
circuit trouble.
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-88
"Physically Replace a Traffic Card" procedure on page 2-271
"Physically Replace a Traffic Card" procedure on page 2-271
Click the Maintenance > Loopback tab.
Choose None from the Loopback Type column for the port being tested.
Choose the appropriate state (Unlocked; Locked,disabled; Unlocked,automaticInService) from the
Admin State column for the port being tested.
Click Apply.
Click Yes in the confirmation dialog box.
"1.5.4 Perform a Terminal (Inward) Loopback on Intermediate-Node MXP/TXP/FC_MR
1-88.
Chapter 1
for the suspected bad card
"2.10.2 Protection Switching,
for basic instructions. For detailed information,
for the faulty card.
General Troubleshooting
Figure
1-37, the
July 2005
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