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Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
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Chapter 2 Alarm Troubleshooting
Alarm Procedures
Note LOGBUFR90 is an informational alarm and does not require troubleshooting.
2.7.126 LOGBUFROVFL
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SDH Logical Object: SYSTEM
The Log Buffer Overflow alarm indicates that the CTC per-NE queue of incoming alarm, event, or
updates, which has a capacity of 5000 entries, has overflowed. This happens only very rarely. However
if it does, you must restart the CTC session. It is likely that some updates will have been missed if this
alarm occurs.
Clear the LOGBUFROVFL Alarm
Step 1 Restart the CTC session.
Step 2 If the alarm does not clear, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.127 LO-LASERBIAS
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SDH Logical Objects: EQPT, STM
DWDM Logical Object: PPM
The Equipment Low Transmit Laser Bias Current alarm is raised against STM port or PPM laser
performance. The alarm indicates that the laser has reached the minimum laser bias tolerance. If the
LO-LASERBIAS alarm threshold is set at 0 percent (the default), the laser's usability has ended. If the
threshold is set at 5 percent to 10 percent, the card is still usable for several weeks or months before you
need to replace it.
Note For information about this alarm applies to DWDM objects, refer to the “Alarm Troubleshooting”
chapter in the Cisco ONS 15454 DWDM Troubleshooting Guide.
Clear the LO-LASERBIAS Alarm
Step 1 Complete the “Physically Replace a Card” procedure on page 2-153 for the controller card (ONS
15310-MA SDH).
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