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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 2 Alarm Troubleshooting
2.7.153 LPBKDS3FEAC
The Cross-Connect Loopback condition indicates that there is a software cross-connect loopback active
between two OC-3 or OC-12 optical ports. A cross-connect loopback test occurs below line speed and
does not affect traffic.
For more information on loopbacks, see the “1.2 Identify Points of Failure on an Electrical Circuit Path”
section on page 1-3.
Note Cross-connect loopbacks occur below line speed. They do not affect traffic.
Clear the LPBKCRS Condition
Step 1 To remove the cross-connect loopback condition, double-click the 15310-CL-CTX or CTX2500 card in
CTC to display the card view.
Step 2 Complete the “Clear an OC-N Port XC Loopback Circuit” procedure on page 2-156.
Step 3 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.153 LPBKDS3FEAC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: DS3
A Loopback Due to FEAC Command DS-3 condition occurs when a DS-3 port loopback signal is
received on a 15310-CL-CTX, DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 card in C-bit line type mode
from the far-end node because of a FEAC command. An FEAC command is often used with loopbacks.
LPBKDS3FEAC is only reported by these DS-3 ports.
Caution CTC permits loopbacks on an in-service (IS) circuit. Loopbacks are Service-Affecting (SA).
Clear the LPBKDS3FEAC Condition
Step 1 In node view, double-click the DS-3 card (15310-CL-CTX, DS1-28/DS3-EC1-3, or
DS1-84/DS3-EC1-3) to display the card view.
Step 2 Click the Provisioning > DS3 > Line tabs.
Step 3 Click the cell for the port in the Send Code column and click No Code from the drop-down list.
Step 4 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).
2.7.154 LPBKDS3FEAC-CMD
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)