Step 3: Display 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 CLI 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

What It Means

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 System Log Messages Reference.