Configuring System Message Logging; Understanding System Message Logging - Cisco Catalyst 2975 Software Configuration Manual

Ios release 12.2(55)se

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Configuring System Message Logging

This chapter describes how to configure system message logging on the Catalyst 2975 switch. Unless

otherwise noted, the term switch refers to a standalone switch and to a switch stack.

For complete syntax and usage information for the commands used in this chapter, see the Cisco IOS

Configuration Fundamentals Command Reference, Release 12.2 from the Cisco.com page under

Documentation > Cisco IOS Software > 12.2 Mainline > Command References.

This chapter consists of these sections:

Logging messages to the console at a high rate can cause high CPU utilization and adversely affect how

the switch operates.

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 number from 1 to 9, and

redirects the output to the logging process on the stack master. Though the stack 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.

The syslog format is compatible with 4.3 BSD UNIX.

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.

Understanding System Message Logging, page 29-1

Configuring System Message Logging, page 29-2

Displaying the Logging Configuration, page 29-14

C H A P T E R

Catalyst 2975 Switch Software Configuration Guide

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