Extreme Networks Summit WM Maintenance Manual page 88

Logs, traces, audits, and DHCP messages
Critical (alarm)
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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 Summit
WM Controller that generate an alarm message:
Reboot due to failure
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Software upgrade failure on the Summit WM Controller
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Software upgrade failure on the Altitude AP
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Detection of rogue access point activity without valid ID
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Availability configuration not identical on the primary and secondary Summit WM Controller
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If SNMP is enabled on the Summit WM 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.
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Summit WM Maintenance Guide, Software Version 5.3