PDF user manual for CopperEdge 150

Alarm ClearingThe phrase “clear an alarm” describes an occurrence (a CE150-generated event or manual action) that causes visual and audiblealarm indications to disappear (usually but not always correspondingto correction of the underlying problem).Some alarms (such as BoardDown) are cleared by the CE150when a corresponding event (in this case, BoardUp) occurs.Other alarms (such as RoleChanged) have no such correspondingevent. In the latter case, you must manually clear the alarmby setting the cmAlarmTable as discussed in the CopperEdge150 CopperCraft Reference and MIB Definitions manual.Manually clearing an alarm in the CE150 does not imply fixingthe problem. Clearing the alarm merely causes the alarm unitto no longer display alarm indications.You can manually clear alarms that support automatic clearing.For example, you would do this if a line card is being removedfrom a system with no immediate plans to replace it. Thealarm that would result from the subsequent BoardDown eventcould be suppressed by manually clearing the alarm. However,we recommend that you do not manually clear such alarmsvery often, because information about the status of your systemwill be discarded in the process.When an alarm is cleared, a Notification message is displayedshowing the new operational condition. Not all Notificationmessages are alarm-clearing; some are simply informational oradvisory. A Warning is essentially a Notification, but with theadded dimension of calling the operator’s attention to a situationthat may include some vulnerability or future risk.&KDSWHU7URXEOHVKRRWLQJ