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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-29225-01
Chapter 21 Configuring System Message Logging
Configuring System Message Logging
Table 21-3 describes the level keywords. It also lists the corresponding UNIX syslog definitions from
the most severe level to the least severe level.
The software generates four other categories of messages:
• Error messages about software or hardware malfunctions, displayed at levels warnings through
emergencies. These types of messages mean that the functionality of the access point is affected.
• Output from the debug commands, displayed at the debugging level. Debug commands are
typically used only by the Technical Assistance Center (TAC).
• Interface up or down transitions and system restart messages, displayed at the notifications level.
This message is only for information; access point functionality is not affected.
• Reload requests and low-process stack messages, displayed at the informational level. This
message is only for information; access point functionality is not affected.
Note Authentication request log messages are not logged on to a syslog server. This feature is not supported
on Cisco Aironet access points.
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 access point 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 Table 21-3
on page 21-8) are stored in the history table even if syslog traps are not enabled.
Table 21-3 Message Logging Level Keywords
Level Keyword Level Description Syslog Definition
emergencies 0 System unstable LOG_EMERG
alerts 1 Immediate action needed LOG_ALERT
critical 2 Critical conditions LOG_CRIT
errors 3 Error conditions LOG_ERR
warnings 4 Warning conditions LOG_WARNING
notifications 5 Normal but significant condition LOG_NOTICE
informational 6 Informational messages only LOG_INFO
debugging 7 Debugging messages LOG_DEBUG