Juniper JUNOS OS 10.3 - SYSTEM LOG MESSAGES REFERENCE 7-12-2010 Reference Manual page 72

Junos 10.3 System Log Messages Reference
Specifying the Facility and Severity of Messages to Include in the Log
8
information in standard-format messages directed to a file or a remote destination,
include the
explicit-priority
Information in System Log Messages" on page 18.
By default, the standard Junos format for messages specifies the month, date, hour,
minute, and second when the message was logged. You can modify the timestamp
on standard-format messages to include the year, the millisecond, or both.
(Structured-data format specifies the year and millisecond by default.) For more
information, see "Including the Year or Millisecond in Timestamps" on page 21.
When directing messages to a remote machine, you can specify the IP address that is
reported in messages as their source. You can also configure features that make it
easier to separate Junos-specific messages or messages generated on particular
routing platforms. For more information, see "Directing Messages to a Remote
Destination from the Routing Matrix" on page 32.
The predefined facilities group together related messages, but you can also use regular
expressions to specify more exactly which messages from a facility are logged to a
file, a user terminal, or a remote destination. For more information, see "Using Regular
Expressions to Refine the Set of Logged Messages" on page 22.
For a statement summary for the statements discussed in this chapter, see the Junos
System Basics Configuration Guide.
For detailed information about configuring system logging, see the following sections:
Specifying the Facility and Severity of Messages to Include in the Log on page 8
Directing Messages to a Log File on page 10
Directing Messages to a User Terminal on page 12
Directing Messages to the Console on page 12
Directing Messages to a Remote Machine or the Other Routing Engine on page 12
Configuring the Size and Number of Log Files on page 17
Including Priority Information in System Log Messages on page 18
Including the Year or Millisecond in Timestamps on page 21
Using Regular Expressions to Refine the Set of Logged Messages on page 22
Disabling Logging of a Facility on page 24
Examples: Configuring System Logging on page 24
Each system log message belongs to a facility, which groups together messages that
either are generated by the same source (such as a software process) or concern a similar
condition or activity (such as authentication attempts). Each message is also preassigned
a severity level, which indicates how seriously the triggering event affects routing platform
functions.
When you configure logging for a facility and destination, you specify a severity level for
each facility. Messages from the facility that are rated at that level or higher are logged
to the following destination:
statement. For more information, see "Including Priority
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