System Log Message Format - Cisco Catalyst 9500 Manual

System Log Message Format

Note
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. Depending on the switch, messages appear in one
of these formats:
• seq no:timestamp: %facility-severity-MNEMONIC:description (hostname-n)
• seq no:timestamp: %facility-severity-MNEMONIC:description
The part of the message preceding the percent sign depends on the setting of these global configuration
commands:
• service sequence-numbers
• service timestamps log datetime
• service timestamps log datetime [localtime] [msec] [show-timezone]
• service timestamps log uptime
Table 11: System Log Message Elements
Element
seq no:
timestamp formats:
mm/dd h h:mm:ss
or
hh:mm:ss (short
uptime)
or
d h (long uptime)
facility
severity
MNEMONIC
description
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
178
The syslog format is compatible with 4.3 BSD UNIX.
Description
Stamps log messages with a sequence number only if the service sequence-numbers
global configuration command is configured.
Date and time of the message or event. This information appears only if the service
timestamps log [datetime | log] global configuration command is configured.
The facility to which the message refers (for example, SNMP, SYS, and so forth).
Single-digit code from 0 to 7 that is the severity of the message.
Text string that uniquely describes the message.
Text string containing detailed information about the event being reported.
Configuring System Message Logs