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1.5.3 Perform a Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR Port
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.
Complete the
Step 4
Clear the terminal loopback on the port before testing the next segment of the network circuit path:
Step 5
a.
b.
c.
d.
e.
f.
Step 6
Complete the
Port" procedure on page
1.5.3 Perform a Facility (Line) Loopback on an Intermediate-Node
MXP/TXP/FC_MR Port
Performing the facility (line) loopback test on an intermediate port isolates whether this node is causing
circuit failure. In the situation shown in
MXP/TXP/FC_MR port.
Figure 1-36
Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR Port
Source
ONS Node
MXP
Test Set
Performing a loopback on an in-service circuit is service-affecting.
Caution
Complete the
procedure on page
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-86
"Physically Replace a Traffic Card" procedure on page 2-271
Double-click the card in the source node with the terminal loopback.
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.
"1.5.3 Perform a Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR
1-86.
XC
TXP
"Create a Facility (Line) Loopback on an Intermediate-Node MXP/TXP/FC_MR Port"
1-87.
Figure
1-36, the test is being performed on an intermediate
Intermediate
ONS Node
MXP
XC
TXP
Chapter 1
General Troubleshooting
for the defective card.
Destination
ONS Node
MXP
XC
TXP
July 2005
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