3.2. The Event Group

   -- the event group
   --
   -- a collection of objects allowing the description and
   -- configuration of events from a SNMPv2 entity acting
   -- in a dual role.

   snmpEvent      OBJECT IDENTIFIER ::= { snmpM2MObjects 2 }

   -- The snmpEvent table defines the set of events generated on
   -- a SNMPv2 entity acting in a dual role.  Each entry in the
   -- snmpEventTable associates an event type with the
   -- notification method and associated parameters.  Some
   -- snmpEvent entries are fired by an associated condition in
   -- the snmpAlarmTable.  Others are fired on behalf of
   -- conditions defined in the NOTIFICATION-TYPE macro.  The
   -- snmpNotificationTable defines notifications that should
   -- occur when an associated event is fired.

   snmpEventNextIndex OBJECT-TYPE
       SYNTAX     INTEGER (0..65535)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The index number of the next appropriate
               unassigned entry in the snmpEventTable.  The value
               0 indicates that no unassigned entries are
               available.

               A management station should create new entries in
               the snmpEventTable using this algorithm: first,
               issue a management protocol retrieval operation to
               determine the value of snmpEventNextIndex; and,
               second, issue a management protocol set operation
               to create an instance of the snmpEventStatus
               object setting its value to `createAndWait' or
               'createAndGo'."
       ::= { snmpEvent 1 }

   snmpEventTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF SnmpEventEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "A list of events."
       ::= { snmpEvent 2 }

   snmpEventEntry OBJECT-TYPE
       SYNTAX     SnmpEventEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "A set of parameters that describe an event that
               is generated when certain conditions are met."
       INDEX      { snmpEventIndex }
       ::= { snmpEventTable 1 }

   SnmpEventEntry ::= SEQUENCE {
       snmpEventIndex          INTEGER,
       snmpEventID             OBJECT IDENTIFIER,
       snmpEventDescription    DisplayString,
       snmpEventEvents         Counter32,
       snmpEventLastTimeSent   TimeStamp,
       snmpEventStatus         RowStatus
   }

   snmpEventIndex OBJECT-TYPE
       SYNTAX     INTEGER (1..65535)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An index that uniquely identifies an entry in the
               snmpEvent table.  Each such entry defines an event
               generated when the appropriate conditions occur."
       ::= { snmpEventEntry 1 }

   snmpEventID OBJECT-TYPE
       SYNTAX     OBJECT IDENTIFIER
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The authoritative identification of the event
               type generated by this entry.  This variable
               occurs as the second varbind of an InformRequest-
               PDU.  If this OBJECT IDENTIFIER maps to a
               NOTIFICATION-TYPE the sender will place the
               objects listed in the NOTIFICATION-TYPE in the
               varbind list."
       ::= { snmpEventEntry 2 }

   snmpEventDescription OBJECT-TYPE
       SYNTAX     DisplayString (SIZE (0..127))
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "A comment describing this snmpEvent entry."
       ::= { snmpEventEntry 3 }

   snmpEventEvents OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The number of events caused by event generators
               associated with this snmpEvent entry."
       ::= { snmpEventEntry 4 }

   snmpEventLastTimeSent OBJECT-TYPE
       SYNTAX     TimeStamp
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The value of sysUpTime at the time this snmpEvent
               entry last generated an event.  If this entry has
               not generated any events, this value will be
               zero."
       DEFVAL { 0 }
       ::= { snmpEventEntry 5 }

   snmpEventStatus OBJECT-TYPE
       SYNTAX     RowStatus
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The status of this snmpEvent entry.  This object
               may not be set to `active' unless the following
               columnar objects exist in this row: snmpEventID,
               snmpEventDescription, snmpEventEvents, and
               snmpEventLastTimeSent.

               Setting an instance of this object to the value
               'destroy' has the effect of invalidating any/all
               entries in the snmpEventTable, and the
               snmpEventNotifyTable which reference the
               corresponding snmpEventEntry."
       ::= { snmpEventEntry 6 }

   snmpEventNotifyMinInterval OBJECT-TYPE
       SYNTAX     Integer32
       UNITS      "seconds"
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The minimum interval that the SNMPv2 entity
               acting in a dual role will wait before
               retransmitting an InformRequest-PDU.  This object
               specifies the minimal value supported by the
               SNMPv2 entity acting in a dual role, based on
               resource or implementation constraints.

               For a particular entry in the
               snmpEventNotifyTable, if the associated
               snmpEventNotifyIntervalRequested variable is
               greater than this object, the
               snmpEventNotifyIntervalRequested value shall be
               used as the minimum interval for retransmissions
               of InformRequest-PDUs sent on behalf of that
               entry."
       ::= { snmpEvent 3 }

   snmpEventNotifyMaxRetransmissions OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The maximum number of time that the SNMPv2 entity
               acting in a dual role will retransmit an
               InformRequest-PDU.  This object specifies the
               maximal value supported by the SNMPv2 entity
               acting in a dual role, based on resource or
               implementation constraints.

               For a particular entry in the
               snmpEventNotifyTable, if the associated
               snmpEventNotifyRetransmissionsRequested variable
               is less than this object, the
               snmpEventNotifyRetransmissionsRequested value
               shall be used as the retransmission count for
               InformRequest-PDUs sent on behalf of that entry."
       ::= { snmpEvent 4 }

   -- The snmpEventNotifyTable is used to configure the
   -- destination and type of notifications sent by a SNMPv2
   -- entity acting in a manager role when a particular event
   -- is triggered.

   snmpEventNotifyTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF SnmpEventNotifyEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "A list of protocol configuration entries for
               event notifications from this entity."
       ::= { snmpEvent 5 }

   snmpEventNotifyEntry OBJECT-TYPE
       SYNTAX     SnmpEventNotifyEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "A set of parameters that describe the type and
               destination of InformRequest-PDUs sent for a
               particular event.  The snmpEventIndex in this
               entry's INDEX clause identifies the snmpEventEntry
               which, when triggered, will generate a
               notification as configured in this entry.  The
               contextIdentity in this entry's INDEX clause
               identifies the context to which a notification
               will be sent."
       INDEX      { snmpEventIndex, contextIdentity }
       ::= { snmpEventNotifyTable 1 }

   SnmpEventNotifyEntry ::= SEQUENCE {
       snmpEventNotifyIntervalRequested        Integer32,
       snmpEventNotifyRetransmissionsRequested Integer32,
       snmpEventNotifyLifetime                 Integer32,
       snmpEventNotifyStatus                   RowStatus
   }

   snmpEventNotifyIntervalRequested OBJECT-TYPE
       SYNTAX     Integer32
       UNITS      "seconds"
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The requested interval for retransmission of
               Inform PDUs generated on the behalf of this entry.

               This variable will be the actual interval used
               unless the snmpEventNotifyMinInterval is greater
               than this object, in which case the interval shall
               be equal to snmpEventNotifyMinInterval."
       DEFVAL { 30 }
       ::= { snmpEventNotifyEntry 1 }

   snmpEventNotifyRetransmissionsRequested OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The requested number of retransmissions of an
               InformRequest-PDU generated on behalf of this
               entry.

               This variable will be the actual number of
               retransmissions used unless the
               snmpEventNotifyMaxRetransmissions is less than
               this object, in which case the retransmission
               count shall be equal to
               snmpEventNotifyMaxRetransmissions."
       DEFVAL { 5 }
       ::= { snmpEventNotifyEntry 2 }

   snmpEventNotifyLifetime OBJECT-TYPE
       SYNTAX     Integer32
       UNITS      "seconds"
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The number of seconds this entry shall live until
               the corresponding instance of
               snmpEventNotifyStatus is set to 'destroy'.  This
               value shall count down to zero, at which time the
               corresponding instance of snmpEventNotifyStatus
               will be set to 'destroy'.  Any management station
               that is using this entry must periodically refresh
               this value to ensure the continued delivery of
               events."
       DEFVAL { 86400 }
       ::= { snmpEventNotifyEntry 3 }

   snmpEventNotifyStatus OBJECT-TYPE
       SYNTAX     RowStatus
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The state of this snmpEventNotifyEntry.  This
               object may not be set to `active' unless the
               following columnar objects exist in this row:
               snmpEventNotifyIntervalRequested,
               snmpEventNotifyRetransmissionsRequested, and
               snmpEventNotifyLifetime."
       ::= { snmpEventNotifyEntry 4 }