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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide
OL-13270-01
Chapter31 Configuring System Message Logging
Configuring System Message Logging
You can set the severity level of the messages to control the type of message s display ed on the co nsoles
and each of the destinations. You can time-stamp log messages or set the syslog sour ce ad dre ss to
enhance real-time debugging and management. For information on possibl e m e ssag es, se e th e s yst em
message guide for this release.
You can access logged system messages by using the switc h comm and- line inter fa ce (CLI ) or by sav ing
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 Ethern et ma na geme nt p ort . I n a swi tc h
stack, all stack member consoles provide the same console out pu t.
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, page31-5 (optional)
•Synchronizing Log Messages, page 31-6 (optional)
•Enabling and Disabling Time Stamps on Log Messages, page31-8 (optional)
•Enabling and Disabling Sequence Numbers in Log Messages, page31-8 (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 a nd a percent sign (%), which follows the optional
sequence number or time-stamp information, if configured. Messages appear in this form at:
For stacking-capable switches, seq no:timestamp: %facility-severity-MNEMONIC:description
(hostname-n)
For nonstacking-capable 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.