Logging Autonomous AP

Severity Levels 

0 Emergency
1 Alert
2 Critical
3 Error
4 Warning
5 Notification
6 Informational -default for remote host syslog
7 Debug! -default for console and terminal

Anatomy of a Syslog message 

[sequence number] + [time stamp] + [%] + [Facility] + [severity level] + [mnemonic]  + [description]

Defaults

In true cisco fashion you should always know your defaults 

logging buffer size 4096

timestamps disabled

sequencing disabled

logging sever none

Some commands

! enable optional timestamp and sequencing fields
!
service timestamp
service sequence-numbers
!
logging host x.x.x.x
!
!Logging  levels
!
logging console lvl
logging monitor lvl
logging trap lvl
!
!Verify
show logging
!

http://www.cisco.com/en/US/docs/wireless/access_point/12.4.25d.JA/Configuration/guide/scg12.4.25d.JA-chap21-msg-logging.html