Cisco Systems 3750E manual Configuring System Message Logging, System Log Message Format, 32-2

Chapter 32 Configuring System Message Logging

Configuring System Message Logging

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 stack master. If a standalone switch or the stack master fails, the log is lost unless you had saved it to flash memory.

You can remotely monitor system messages by viewing the logs on a syslog server or by accessing the switch through Telnet, through the console port, or through the Ethernet management port. In a switch stack, all stack member consoles provide the same console output.

Configuring System Message Logging

These sections contain this configuration information:

•System Log Message Format, page 32-2

•Default System Message Logging Configuration, page 32-4

•Disabling Message Logging, page 32-4(optional)

•Setting the Message Display Destination Device, page 32-5(optional)

•Synchronizing Log Messages, page 32-6(optional)

•Enabling and Disabling Time Stamps on Log Messages, page 32-8(optional)

•Enabling and Disabling Sequence Numbers in Log Messages, page 32-8(optional)

•Defining the Message Severity Level, page 32-9(optional)

•Limiting Syslog Messages Sent to the History Table and to SNMP, page 32-10(optional)

•Enabling the Configuration-Change Logger, page 32-11(optional)

•Configuring UNIX Syslog Servers, page 32-12(optional)

System Log Message Format

System log messages can contain up to 80 characters and a percent sign (%), which follows the optional sequence number or time-stamp information, if configured. Messages appear in this format:

For Catalyst 3750-E switches, seq no:timestamp: %facility-severity-MNEMONIC:description (hostname-n)

For Catalyst 3560-E switches, seq no:timestamp: %facility-severity-MNEMONIC:description

The part of the message preceding the percent sign depends on the setting of the service sequence-numbers, service timestamps log datetime, service timestamps log datetime [localtime] [msec] [show-timezone], or service timestamps log uptime global configuration command.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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