Log Severity Levels

Log messages are classified at four levels of severity:

• Information (the activity of normal operation)
• Minor (alarm)
• Major (alarm)
• Critical (alarm)

The alarm messages (minor, major or critical log messages) are triggered by activities that meet certain conditions that should be known and dealt with. The following are examples of events on the wireless controller that generate an alarm message:

• Reboot due to failure
• Software upgrade failure on the wireless controller
• Software upgrade failure on the wireless AP
• Detection of rogue access point activity without valid ID
• Availability configuration not identical on the primary and secondary wireless controller

If SNMP is enabled on the wireless controller, alarm conditions will trigger a trap in SNMP (Simple Network Management Protocol). An SNMP trap is an event notification sent by the managed agent (a network device) to the management system to identify the occurrence of conditions.

Note

The log statements Low water mark level was reached and Incoming message dropped, because of the rate limiting mechanism indicate that there is a burst of log messages coming to the event server and the processing speed is slower than the incoming rate of log messages. These messages do not indicate that the system is impaired in any way.