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Cisco ONS 15327 Troubleshooting Guide, R3.4
March 2004
Chapter2 Alarm Troublesho oting Alarm Procedures
2.6.116 LPBKFACILITY (OC-N)
•Not Alarmed (NA), Non-Service Affecting (NSA)
An OC-N Loopback Facility condition occurs when a software facility loopback is active for a port on
the reporting card.
For more information about loopbacks, see the “Identify Points of Failure on an OC-N Circuit Path”
section on page 1-21.

Procedure: Clear the LPBKFACILITY (OC-N) Condition

Step 1 Complete the “Clear a Loopback” procedure on page 2-128.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).
Caution Before performing a facility loopback on an OC-N c ard, m ake sur e the car d co ntain s at le ast two D CC
paths to the node where the card is installed. A second D CC p ath provides a nonlooped path to log into
the node after the loopback is applied, thus enabling you to remove the facility loopback. Ensuri ng a
second DCC is not necessary if you are directly connected to the ONS 15327 containing the loopback
OC-N.
2.6.117 LPBKTERMINAL (DS-N, OC-N)
•Not Alarmed (NA), Non-Service Affecting (NSA)
A DS-N or OC-N Loopback Terminal (LPBKTERMINAL) condition occurs when a software facility
loopback is active for a port on the reporting card.
For more information about loopbacks, see the “Network Troubleshooting Tests” section on page 1-2.
Note Terminal loopback is not supported at the DS1 level for the XTC-28-3 card.

Procedure: Clear the LPBKTERMINAL (DS-N, OC-N) Condition

Step 1 Complete the “Clear a Loopback” procedure on page 2-128.
Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC
(1-800-553-2447).