Information About Configuring System Message Logs - Cisco Catalyst 2960 series Configuration Manual

Configuring System Message Logs
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Information About Configuring System Message Logs

System Messsage Logging
By default, a switch sends the output from system messages and debug privileged EXEC commands to a
logging process. Stack members can trigger system messages. A stack member that generates a system message
appends its hostname in the form of hostname-n, where n is a switch range from 1 to 8, and redirects the
output to the logging process on the active switchstack master. Though the active switchstack master is a stack
member, it does not append its hostname to system messages. The logging process controls the distribution
of logging messages to various destinations, such as the logging buffer, terminal lines, or a UNIX syslog
server, depending on your configuration. The process also sends messages to the console.
When the logging process is disabled, messages are sent only to the console. The messages are sent as they
are generated, so message and debug output are interspersed with prompts or output from other commands.
Messages appear on the active consoles after the process that generated them has finished.
You can set the severity level of the messages to control the type of messages displayed on the consoles and
each of the destinations. You can time-stamp log messages or set the syslog source address to enhance real-time
debugging and management. For information on possible messages, see the system message guide for this
release.
You can access logged system messages by using the switch command-line interface (CLI) or by saving them
to a properly configured syslog server. The switch software saves syslog messages in an internal buffer on a
standalone switch, and in the case of a switch stack, on the active switchstack master. If a standalone switch
or the stack master fails, the log is lost unless you had saved it to flash memory.
Information About Configuring System Message Logs, page 1597
How to Configure System Message Logs, page 1600
Monitoring and Maintaining System Message Logs, page 1609
Configuration Examples for System Message Logs, page 1609
Additional References for System Message Logs, page 1610
Feature History and Information For System Message Logs, page 1611
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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