Cisco 15310-MA Anleitung zur Fehlerbehebung PDF herunterladen (Seite 227)

2-97

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, Release 9.0

78-18394-01

Chapter 2 Alarm Troubleshooting

Alarm Procedures

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/techsupport

for more information or call Cisco TAC (1-800-553-2447).

2.7.143 LO-LASERBIAS

Default Severity: Minor (MN), Non-Service-Affecting (NSA)

SONET Logical Objects: EQPT, OCN

DWDM Logical Object: PPM

The Equipment Low Transmit Laser Bias Current alarm is raised against OCN 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 2-163 for the controller card

(15310-CL-CTX or CTX2500 card).

Caution Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,

perform an external switch if a switch has not already occurred. See the “2.10.1 Protection Switching,

Lock Initiation, and Clearing” section on page 2-156 for commonly used traffic-switching procedures.

Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15310-CL

or ONS 15310-MA.

Note When you replace a card with the identical type of card, you do not need to make any changes

to the database.

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