Cisco WS-C2960-24TC-S Software Guide - Page 470

Configuring System Message Logging Chapter 25 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 25-3 on page 25-9) 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. This procedure is optional. Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Command Purpose configure terminal logging history level1 Enter global configuration mode. Change the default level of syslog messages stored in the history file and sent to the SNMP server. See Table 25-3 on page 25-9 for a list of level keywords. By default, warnings, errors, critical, alerts, and emergencies messages are sent. 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 0 to 500 messages. end Return to privileged EXEC mode. show running-config Verify your entries. copy running-config startup-config (Optional) Save your entries in the configuration file. 1. Table 25-3 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. Enabling the Configuration-Change Logger You can enable a configuration logger to keep track of configuration changes made with the command-line interface (CLI). When you enter the logging enable configuration-change logger configuration command, the log records the session, the user, and the command that was entered to change the configuration. You can configure the size of the configuration log from 1 to 1000 entries (the default is 100). You can clear the log at any time by entering the no logging enable command followed by the logging enable command to disable and reenable logging. 25-10 Catalyst 2960 Switch Software Configuration Guide OL-8603-04