This event means numerous devices on the network are affected by the event. Everyone who can should stop what they are doing and focus on fixing the problem.
Major
A device is completely down or in danger of going down. Attention needs to be paid to this problem immediately.
Minor
A part of a device (a service, and interface, a power supply, etc.) has stopped functioning. The device needs attention.
Warning
An event has occurred that may require action. This severity can also be used to indicate a condition that should be noted (logged) but does not require direct action.
Normal
Informational message. No action required.
Cleared
This event indicates that a prior error condition has been corrected and service is restored
