Alarm Status | |
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New | When an event triggers a new alarm or an event is associated with an existing alarm. |
Acknowledged | When you acknowledge an alarm, the status changes from New to Acknowledged. |
Cleared | An alarm can be in these statuses: - Auto-clear from the device—The fault is resolved on the device and an event is triggered for the same. For example, a device-reachable event clears the device-unreachable event. This in-turn, clears the device-unreachable alarm.
- Manual-clear from Prime Infrastructure users: You can manually clear an active alarm without resolving the fault in the network. A clearing event is triggered and this event clears the alarm.
- If the fault continues to exist in the network, a new event and alarm are created subsequently based on the event notification (traps/syslogs).
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This might be the reason, I believe.
Please refer the following link for better understanding.
http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/1-2/user/guide/prime_infra_ug/alarms.html
Hope that helps.