Default System Log Settings

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Table 8 summarizes the default system log settings that apply to all platforms that run the JUNOS software, and specifies which statement to include in the configuration to override the default value.

Table 8: Default System Logging Settings

Setting	Default	Overriding Statement	Instructions
Alternative facility for message forwarded to a remote machine	For change-log: local6 For conflict-log: local5 For dfc: local1 For firewall: local3 For interactive-commands: local7 For pfe: local4	`[edit system syslog] host hostname { facility-override facility; }`	Changing the Alternative Facility Name for Remote Messages
Format of messages logged to a file	Standard JUNOS format, based on UNIX format	`[edit system syslog] file filename { structured-data; }`	Logging Messages in Structured-Data Format
Maximum number of files in the archived set	10	`[edit system syslog] archive { files number; } file filename { archive { files number ; } }`	Configuring the Size and Number of Log Files
Maximum size of log file	J-series: 128 kilobytes (KB) M-series, MX-series, and T-series: 1 megabyte (MB) TX Matrix: 10 MB	`[edit system syslog] archive { size size; } file filename { archive { size size; } }`	Configuring the Size and Number of Log Files
Timestamp format	Month, date, hour, minute, second For example: Aug 21 12:36:30	`[edit system syslog] time-format format;`	Including the Year or Millisecond in Timestamps
Users who can read log files	root user and users with the JUNOS maintenance permission	`[edit system syslog] archive { world-readable; } file filename { archive { world-readable; } }`	Configuring the Size and Number of Log Files

In addition, the following messages are generated by default on specific platforms. To view either type of message, you must configure at least one destination for messages as described in Minimum System Logging Configuration

On J-series platforms, a message is logged when a process running in the kernel consumes 500 or more consecutive milliseconds of CPU time.
To log the message on an M-series, MX-series, or T-series platform, include the kernel info statement at the appropriate hierarchy level:
[edit system syslog] (console | file filename | host destination | user username) { kernel info; }
The master Routing Engine on each T640 routing node in a routing matrix forwards to the master Routing Engine on the TX Matrix platform all messages with a severity of info and higher. This is equivalent to the following configuration statement included on the TX Matrix platform:[edit system syslog] host scc-master { any info; }

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