Table 104: Control Board LEDs
DescriptionStateColorLabel
Control Board is online and functioning
normally.
On steadilyGreenOK
Control Board has failed.On steadilyAmberFAIL
Control Board is functioning as master.On steadilyBlueMASTER
Display Control Board Error Messages in the System Log File
Purpose To determine the details of the Control Board error messages in the system log file.
Action To check for Control Board error messages in the system log messages file, use the
following command:
user@host> show log messages | match cb
Check for messages at least 5 minutes before and after a Control Board alarm occurs.
Sample Output
user@host> show log messages | match cb
May 18 16:04:06 routerhost chassisd[4836]: CHASSISD_FRU_OFFLINE_NOTICE: CB 1
offline: Offlined
Meaning The messages system log file records the time the failure or event occurred, the severity
level, a code, and a message description. You can also use the show log messages | match
cb command to see error messages that are generated when a Control Board fails or is
offline. Use this information to diagnose a Control Board problem and to let the Juniper
Networks Technical Assistance Center (JTAC) know what error messages were generated
and the router events that occurred before and after the problem. For more information
about system log messages, see the Junos OS System Log Messages Reference.
Display Control Board Error Messages in the Chassis Daemon Log File
Purpose To determine the details of the Control Board error messages in the chassis daemon log
file.
Action To display Control Board error messages in the chassisd log file, use the following
command:
user@host> show log chassisd | match cb
Sample Output
user@host> show log chassisd | match cb
May 18 16:04:06 CHASSISD_FRU_OFFLINE_NOTICE: Taking CB 1 offline: Offlined
May 18 16:04:06 GBUS cmd to CB#1 [0x9], Green LED Off [0x1a]
Copyright © 2012, Juniper Networks, Inc.392
M Series and T Series Routers Monitoring and Troubleshooting Guide
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