Setting The Message Display Destination Device - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring System Message Logging
Message logging is enabled by default. It must be enabled to send messages to any destination other than
the console. When enabled, log messages are sent to a logging process, which logs messages to
designated locations asynchronously to the processes that generated the messages.
To disable message logging, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# no logging on
Step 3
Switch(config)# end
Step 4
Switch# show running-config
or
show logging
Step 5
Switch# copy running-config
startup-config
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 are
displayed 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
To reenable 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.
To specify the locations that receive messages, perform this task, beginning in privileged EXEC mode:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# logging buffered
[ ]
size
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
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Purpose
Enters global configuration mode.
Disables message logging.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
"Synchronizing Log Messages" section on page
Purpose
Enters global configuration mode.
Logs messages to an internal buffer on the switch. The default buffer size
is 4096. The range is 4096 to 2147483647 bytes.
If the switch, the log file is lost unless you previously saved it to flash
memory. See Step 4.
Do not make the buffer size too large because the switch could run
Note
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.
Chapter 70 Configuring System Message Logging
70-5.