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Configuring the information center
The information center on a device classifies and manages logs for all modules so that network
administrators can monitor network performance and troubleshoot network problems.
Overview
The information center receives logs generated by source modules and outputs logs to different
destinations according to user-defined output rules. You can classify, filter, and output logs based on
source modules. To view the supported source modules, use
info-center source ?
.
Figure 82 Information center diagram
By default, the information center is enabled. It affects system performance to some degree while
processing large amounts of information. If the system resources are insufficient, disable the
information center to save resources.
Log types
Logs are classified into the following types:
•
Common logs
—Record common system information. Unless otherwise specified, the term
"logs" in this document refers to common logs.
•
Diagnostic logs
—Record debug messages.
•
Security logs
—Record security information, such as authentication and authorization
information.
•
Hidden logs
—Record log information not displayed on the terminal, such as input commands.
•
Trace logs
—Record system tracing and debug messages, which can be viewed only after the
devkit package is installed.
Log levels
Logs are classified into eight severity levels from 0 through 7 in descending order. The information
center outputs logs with a severity level that is higher than or equal to the specified level. For
example, if you specify a severity level of 6 (informational), logs that have a severity level from 0 to 6
are output.
Table 18 Log levels
Severity value
Level
Description
0
Emergency
The system is unusable. For example, the system authorization has
expired.
1
Alert
Action must be taken immediately. For example, traffic on an
interface exceeds the upper limit.
2
Critical
Critical condition. For example, the device temperature exceeds
the upper limit, the power module fails, or the fan tray fails.
Output destination
Logs