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NOTE:
By default, the information center is enabled. The information center affects system performance to some
degree due to information classification and output. The impact becomes more obvious when the
information center processes large amounts of information.
Classification of system information
The system information of the information center is categorized into three types:
•
Log information
•
Trap information
•
Debugging information
System information levels
The information is classified into eight levels by severity. The severity levels, in descending order are
emergency, alert, critical, error, warning, notice, informational and debug. When system information is
output by level, information with severity level higher than or equal to the specified level is output. For
example, in the output rule, if you configure to output information with severity level being informational,
the information with severity level being emergency through informational will be output.
Table 1
Severity description
Severity Severity
value
Description
Corresponding keyword in commands
Emergency
0
The system is unusable.
emergencies
Alert 1
Action must be taken
immediately
alerts
Critical 2
Critical
conditions
critical
Error 3
Error
conditions
errors
Warning 4
Warning
conditions
warnings
Notice 5
Normal but significant
condition
notifications
Informational 6
Informational
messages
informational
Debug 7
Debug-level
messages
debugging
System information channels and output destinations
The system supports ten channels. By default, channels 0 through 6, and channel 9 are configured with
channel names and output rules, and they are associated with output destinations. The channel names,
output rules and the associations between the channels and output destinations can be changed through
commands. You can configure channels 7, and 8 without changing the default configuration of the eight
channels.