Log Verbosity; Persistent Logs; Table 3: Log Severity Descriptions - Juniper JUNOSE 11.1.X - SYSTEM EVENT LOGGING REFERENCE GUIDE 3-24-2010 Reference Manual

JUNOSe 11.1.x System Event Logging Reference Guide
NOTE: Not every event category supports every severity level. For a list of event
categories and the severity levels that each category supports, see "Event Categories"
on page 23.

Table 3: Log Severity Descriptions

Log Verbosity

The verbosity level determines the amount of information that appears in each
message. You can assign the verbosity level for the log category. Verbosity levels can
be any of the following:
NOTE: Many event categories provide only low-verbosity detail regardless of the
verbosity setting.

Persistent Logs

Log messages can survive a system reboot. After a reboot, the system rebuilds the
list of log messages. However, if the system detects any problems or has gone through
a power cycle, the buffer is reset, and the log messages from the previous session
are lost.
4
Overview of System Logging
Severity Number Severity Name
0 Emergency
1 Alert
2 Critical
3 Error
4 Warning
5 Notice
6 Info
7 Debug
Low Terse
Medium Moderate
High Verbose
System Response
System unusable; shelf reset
Immediate action needed; card reset
Critical conditions exist; interface is down
Error conditions; nonrecoverable software error
Warning conditions; recoverable software error
Normal but significant conditions; nonerror,
low-verbosity information
Informational messages; nonerror, medium-verbosity
information
Debug messages; nonerror, high-verbosity information