Description: A list of alarm table entries. The table contains zero, one, or many rows at any moment, depending upon the number of alarm conditions in effect. The table is initially empty at agent startup. The agent creates a row in the table each time a condition is detected and deletes that row when that condition no longer pertains. The agent creates the first row with aiSPYAlarmId equal to 1, and increments the value of aiSPYAlarmId each time a new row is created, wrapping to the first free value greater than or equal to 1 when the maximum value of aiSPYAlarmId would otherwise be exceeded. Consequently, after multiple operations, the table may become sparse, e.g., containing entries for rows 95, 100, 101, and 203 and the entries should not be assumed to be in chronological order because aiSPYAlarmId might have wrapped.

Alarms are named by an AutonomousType (OBJECT IDENTIFIER), aiSPYAlarmDescr, to allow a single table to reflect well known alarms plus alarms defined by a particular implementation, i.e., as documented in the private enterprise MIB definition for the device. No two rows will have the same value of aiSPYAlarmDescr, since alarms define conditions. In order to meet this requirement, care should be taken in the definition of alarm conditions to insure that a system cannot enter the same condition multiple times simultaneously.

The number of rows in the table at any given time is reflected by the value of aiSPYAlarmsPresent.