Cisco Catalyst 4500 Series Software Configuration Guide

70-2
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 70 Configuring System Message Logging
Configuring System Message Logging
You can remotely monitor system messages by viewing the logs on a syslog server or by accessing the
switch through Telnet or using the console port.
Configuring System Message Logging
These sections describe how to configure system message logging:
• System Log Message Format, page 70-2
• Default System Message Logging Configuration, page 70-3
• Disabling Message Logging, page 70-3
• Setting the Message Display Destination Device, page 70-4
• Synchronizing Log Messages, page 70-5
• Enabling and Disabling Timestamps on Log Messages, page 70-6
• Enabling and Disabling Sequence Numbers in Log Messages (Optional), page 70-7
• Defining the Message Severity Level (Optional), page 70-8
• Limiting Syslog Messages Sent to the History Table and to SNMP (Optional), page 70-9
• Configuring UNIX Syslog Servers, page 70-10
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 are displayed in this format:
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] command or the
service timestamps log uptime global configuration command.
Table 70-1 describes the elements of syslog messages.
Table 70-1 System Log Message Elements
Element Description
seq no: Stamps log messages with a sequence number only if the service sequence-numbers global
configuration command is configured.
For more information, see the “Enabling and Disabling Sequence Numbers in Log Messages
(Optional)” section on page 70-7.
timestamp formats:
mm/dd hh:mm:ss
or
hh:mm:ss (short uptime)
or
d h (long uptime)
Date and time of the message or event. This information appears only if the service timestamps
log [datetime | log] global configuration command is configured.
For more information, see the “Enabling and Disabling Timestamps on Log Messages” section on
page 70-6.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E