Limiting Syslog Messages Sent To The History Table And To Snmp; Configuring Unix Syslog Servers - Cisco WS-C3550-12G Software Configuration Manual

Configuring System Message Logging

Limiting Syslog Messages Sent to the History Table and to SNMP

If you have enabled syslog message traps to be sent to an SNMP network management station by using
the snmp-server enable trap global configuration command, you can change the level of messages sent
and stored in the switch history table. You can also change the number of messages that are stored in the
history table.
Messages are stored in the history table because SNMP traps are not guaranteed to reach their
destination. By default, one message of the level warning and numerically lower levels (see
on page
Beginning in privileged EXEC mode, follow these steps to change the level and history table size
defaults:
Command
Step 1
configure terminal
Step 2 logging history level
Step 3 logging history size number
Step 4
end
Step 5
show running-config
Step 6 copy running-config startup-config
1. Table 17-3 lists the level keywords and severity level. For SNMP usage, the severity level values increase by 1. For example, emergencies
equal 1, not 0, and critical equals 3, not 2.
When the history table is full (it contains the maximum number of message entries specified with the
logging history size global configuration command), the oldest message entry is deleted from the table
to allow the new message entry to be stored.
To return the logging of syslog messages to the default level, use the no logging history global
configuration command. To return the number of messages in the history table to the default value, use
the no logging history size global configuration command.

Configuring UNIX Syslog Servers

The next sections describe how to configure the UNIX server syslog daemon and define the UNIX
system logging facility.
Catalyst 3550 Multilayer Switch Software Configuration Guide
17-10
17-9) are stored in the history table even if syslog traps are not enabled.
Purpose
Enter global configuration mode.
1
Change the default level of syslog messages stored in the history file and
sent to the SNMP server.
See Table 17-3 on page 17-9
By default, warnings, errors, critical, alerts, and emergencies messages
are sent.
Specify the number of syslog messages that can be stored in the history
table.
The default is to store one message. The range is 1 to 500 messages.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Chapter 17 Configuring System Message Logging
for a list of level keywords.
Table 17-3
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