Juniper Networks J-Series manual Regular Expressions, System Logging Severity Levels

J-series™ Services Router Administration Guide

Table 81: System Logging Facilities (continued)

Facility	Description
interactive-commands	Commands executed in the CLI
kernel	Messages generated by the JUNOS kernel
user	Messages from random user processes

Table 82: System Logging Severity Levels

Severity Level (from Highest to
Lowest Severity)	Description
emergency	System panic or other conditions that cause the routing platform to stop functioning.
alert	Conditions that must be corrected immediately, such as a corrupted system database.
critical	Critical conditions, such as hard drive errors.
error	Standard error conditions that generally have less serious consequences than errors in
	the emergency, alert, and critical levels.
warning	Conditions that warrant monitoring.
notice	Conditions that are not error conditions but are of interest or might warrant special
	handling.
info	Informational messages. This is the default.
debug	Software debugging messages.

Regular Expressions

On the J-Web View Events page, you can use regular expressions to filter and display a set of messages for viewing. JUNOS supports POSIX Standard 1003.2 for extended (modern) UNIX regular expressions.

Table 83 on page 159 specifies some of the commonly used regular expression operators and the terms matched by them. A term can match either a single alphanumeric character or a set of characters enclosed in square brackets, parentheses, or braces. For information about how to use regular expression to filter sytem log messages, see “Filtering System Log Messages” on page 162.

NOTE: On the J-Web View Events page, the regular expression matching is case-sensitive.

158■ System Log Messages Overview