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23-10
Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
Chapter 23 Configuring System Message Logging
Configuring System Message Logging
Limiting Syslog Messages Sent to the History Table and to SNMP
If you 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 also can 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 Table 23-3
on page 23-9) are stored in the history table even if syslog traps are not enabled.
Beginning in privileged EXEC mode, follow these steps to change the level and history table size
defaults:
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 how to define the UNIX
system logging facility.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
logging history level
1
1. Table 23-3 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.
Change the default level of syslog messages stored in the history file and
sent to the SNMP server.
See Table 23-3 on page 23-9 for a list of level keywords.
By default, warnings, errors, critical, alerts, and emergencies messages
are sent.
Step 3
logging history size number 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.
Step 4
end Return to privileged EXEC mode.
Step 5
show running-config Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.