Cisco Systems 3750E Setting the Message Display Destination Device, Logging buffered size, 32-5

Chapter 32 Configuring System Message Logging

Configuring System Message Logging

Disabling the logging process can slow down the switch because a process must wait until the messages are written to the console before continuing. When the logging process is disabled, messages appear on the console as soon as they are produced, often appearing in the middle of command output.

The logging synchronous global configuration command also affects the display of messages to the console. When this command is enabled, messages appear only after you press Return. For more information, see the “Synchronizing Log Messages” section on page 32-6.

To re-enable message logging after it has been disabled, use the logging on global configuration command.

Setting the Message Display Destination Device

If message logging is enabled, you can send messages to specific locations in addition to the console. Beginning in privileged EXEC mode, use one or more of the following commands to specify the locations that receive messages. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	logging buffered [size]	Log messages to an internal buffer on the switch or on a standalone switch
		or, in the case of a switch stack, on the stack master. The range is 4096 to
		2147483647 bytes. The default buffer size is 4096 bytes.
		If the standalone switch or the stack master fails, the log file is lost unless
		you previously saved it to flash memory. See Step 4.
		If the Catalyst 3560-E switch fails, the log file is lost unless you had
		previously saved it to flash memory. See Step 4.
		Note Do not make the buffer size too large because the switch could run
		out of memory for other tasks. Use the show memory privileged
		EXEC command to view the free processor memory on the switch.
		However, this value is the maximum available, and the buffer size
		should not be set to this amount.
Step 3
	logging host	Log messages to a UNIX syslog server host.
		For host, specify the name or IP address of the host to be used as the
		syslog server.
		To build a list of syslog servers that receive logging messages, enter this
		command more than once.
		For complete syslog server configuration steps, see the “Configuring
		UNIX Syslog Servers” section on page 32-12.

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

OL-9775-02 32-5