Cisco NCS 4000 Series Troubleshooting Manual page 27

Alarm Management
LOS
Default Severity: Critical (CR), Service-Affecting (SA)
Logical Object: PORT
Loss of Signal (LOS) alarm occurs when the output connection point is not connected to the input connection
point.
LOS alarm occurs due to fiber connectivity issue(s).
Clear the LOS Alarm
Procedure
Step 1 Ensure the cable between the interface ports is connected correctly. Correct the cable connections if necessary.
Step 2
Check for physical defects in the cable (such as cuts).
Step 3 Check the cable connectors. A reversal of the transmit and receive pairs or an open receive pair can cause
errors. If yes, swap the transmit and receive pairs.
If the condition does not clear, log into the Technical Support Website at
index.html
Local Fault
Default Severity: Major (MJ), Service-Affecting (SA)
Logical Object: ETHERNET
The Local Fault (LF) alarm occurs when there is a fault in the local OTN network.
Clear the Local Fault (LF) Alarm
Procedure
Step 1
Ensure there is no alarm in the provider network of the peer port. In case an alarm is present, it needs to be
cleared by following the clearing procedure for that alarm. The alarms that could trigger the LF alarm are -
LOF, LOS, FEC-MISM, ODUk-TIM-PM, OTUk-SF.
Step 2
Clear the alarm causing the LF alarm.
The clearing procedures for the above mentioned alarms are here.
• LOF
• LOS -
• FEC-MISM -
• ODUk-TIM-PM -
for more information or call Cisco TAC (1 800 553-2447).
-#unique_59
#unique_60
#unique_61
#unique_62
http://www.cisco.com/c/en/us/support/
Alarms Troubleshooting Guide for Cisco NCS 4000 Series
LOS
13