Cisco Systems 4500 Synchronizing Log Messages

52-6
Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 52 Configuring System Message Logging
Configuring System Message Logging
Synchronizing Log Messages
You can synchronize unsolicited messages and debug privileged EXEC command output with solicited
device output and prompts for a specific console port line or virtual terminal line. You can identify the
types of messages to be output asynchronously based on the level of severity. You can also configure the
maximum number of buffers for storing asynchronous messages for the terminal after which messages
are dropped.
When synchronous logging of unsolicited messages and debug command output is enabled, unsolicited
device output appears on the console or printed after solicited device output appears or printed.
Unsolicited messages and debug command output appears on the console after the prompt for user input
is returned. Unsolicited messages and debug command output are not interspersed with solicited device
output and prompts. After the unsolicited messages are displayed, the console again displays the user
prompt.
To configure synchronous logging, perform this task:
Command Purpose
Step 1 Switch# configure terminal Enters global configuration mode.
Step 2 Switch(config)# line [console | vty]
line-number [ending-line-number]Specifies the line to be configured for synchronous logging of
messages.
• Use the console keyword for configurations that occur using the
switch console port.
• Use the line vty line-number command to specify which vty
lines are to have synchronous logging enabled. You use a vty
connection for configurations that occur through a Telnet
session. The range of line numbers is from 0 to 15.
You can change the setting of all 16 vty lines at once by entering:
line vty 0 15
Or you can change the setting of the single vty line being used for
your current connection. For example, to change the setting for vty
line 2, enter:
line vty 2
When you enter this command, the mode changes to line
configuration.
Step 3 Switch(config)# logging synchronous
[level [severity-level | all] | limit
number-of-buffers]
Enables synchronous logging of messages.
• (Optional) For level severity-level, specify the message severity
level. Messages with a severity level equal to or higher than this
value are printed asynchronously. Low numbers mean greater
severity and high numbers mean lesser severity. The default is 2.
• (Optional) Specifying level all means that all messages are
printed asynchronously regardless of the severity level.
• (Optional) For limit number-of-buffers, specify the number of
buffers to be queued for the terminal after which new messages
are dropped. The range is 0 to 2147483647. The default is 20.
Step 4 Switch(config)# end Returns to privileged EXEC mode.