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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
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Chapter 31 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 31-2
•
Default System Message Logging Configuration, page 31-4
•
Disabling Message Logging, page 31-4
(optional)
•
Setting the Message Display Destination Device, page 31-5
(optional)
•
Synchronizing Log Messages, page 31-6
(optional)
•
Enabling and Disabling Time Stamps on Log Messages, page 31-8
(optional)
•
Enabling and Disabling Sequence Numbers in Log Messages, page 31-8
(optional)
•
Defining the Message Severity Level, page 31-9
(optional)
•
Limiting Syslog Messages Sent to the History Table and to SNMP, page 31-10
(optional)
•
Enabling the Configuration-Change Logger, page 31-11
(optional)
•
Configuring UNIX Syslog Servers, page 31-12
(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 stacking-capable switches, seq no:timestamp: %facility-severity-MNEMONIC:description
(hostname-n)
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.
