-- ==================================================================
-- Description:  Remote Network Monitoring MIB
-- Reference:    This mib was extracted from RFC 2819
-- ==================================================================

RMON-MIB DEFINITIONS ::= BEGIN

    IMPORTS
        MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
        NOTIFICATION-TYPE, mib-2, Counter32,
        Integer32, TimeTicks
            FROM SNMPv2-SMI
        TEXTUAL-CONVENTION, DisplayString      
            FROM SNMPv2-TC
        MODULE-COMPLIANCE, OBJECT-GROUP,
        NOTIFICATION-GROUP                     
            FROM SNMPv2-CONF
        mib-2 
            FROM RFC1213-MIB;
       
    --  Remote Network Monitoring MIB
    rmonMibModule MODULE-IDENTITY
        LAST-UPDATED "200005110000Z"  -- 11 May, 2000
        ORGANIZATION "IETF RMON MIB Working Group"
        CONTACT-INFO
            "Steve Waldbusser
            Phone: +1-650-948-6500
            Fax:   +1-650-745-0671
            Email: waldbusser@nextbeacon.com"
        DESCRIPTION
            "Remote network monitoring devices, often called
            monitors or probes, are instruments that exist for
            the purpose of managing a network. This MIB defines
            objects for managing remote network monitoring devices."
        
        REVISION "200005110000Z"    -- 11 May, 2000
        DESCRIPTION
            "Reformatted into SMIv2 format.
            
            This version published as RFC 2819."
        
        REVISION "199502010000Z" -- 1 Feb, 1995
        DESCRIPTION
            "Bug fixes, clarifications and minor changes based on
            implementation experience, published as RFC1757 [18].
            
            Two changes were made to object definitions:
            
            1) A new status bit has been defined for the
            captureBufferPacketStatus object, indicating that the
            packet order within the capture buffer may not be identical to
            the packet order as received off the wire.  This bit may only

            be used for packets transmitted by the probe.  Older NMS
            applications can safely ignore this status bit, which might be
            used by newer agents.
            
            2) The packetMatch trap has been removed.  This trap was never
            actually 'approved' and was not added to this document along
            with the risingAlarm and fallingAlarm traps. The packetMatch
            trap could not be throttled, which could cause disruption of
            normal network traffic under some circumstances. An NMS should
            configure a risingAlarm threshold on the appropriate
            channelMatches instance if a trap is desired for a packetMatch
            event. Note that logging of packetMatch events is still
            supported--only trap generation for such events has been
            removed.
            
            In addition, several clarifications to individual object
            definitions have been added to assist agent and NMS
            implementors:
            
            - global definition of 'good packets' and 'bad packets'
            
            - more detailed text governing conceptual row creation and
            modification
            
            - instructions for probes relating to interface changes and
            disruptions
            
            - clarification of some ethernet counter definitions
            
            - recommended formula for calculating network utilization
            
            - clarification of channel and captureBuffer behavior for some
            unusual conditions
            
            - examples of proper instance naming for each table"

        REVISION "199111010000Z"    -- 1 Nov, 1991
        DESCRIPTION
            "The original version of this MIB, published as RFC1271."
        ::= { rmonConformance 8 }     

    rmon    OBJECT IDENTIFIER ::= { mib-2 16 }

    -- textual conventions

    OwnerString ::= TEXTUAL-CONVENTION

        STATUS current
        DESCRIPTION
            "This data type is used to model an administratively
            assigned name of the owner of a resource. Implementations
            must accept values composed of well-formed NVT ASCII
            sequences. In addition, implementations should accept
            values composed of well-formed UTF-8 sequences.
            
            It is suggested that this name contain one or more of
            the following: IP address, management station name,
            network manager's name, location, or phone number.
            In some cases the agent itself will be the owner of
            an entry.  In these cases, this string shall be set
            to a string starting with 'monitor'.
            
            SNMP access control is articulated entirely in terms
            of the contents of MIB views; access to a particular
            SNMP object instance depends only upon its presence
            or absence in a particular MIB view and never upon
            its value or the value of related object instances.
            Thus, objects of this type afford resolution of
            resource contention only among cooperating
            managers; they realize no access control function
            with respect to uncooperative parties."
        SYNTAX OCTET STRING (SIZE (0..127))

    EntryStatus ::= TEXTUAL-CONVENTION
        STATUS current
        DESCRIPTION
            "The status of a table entry.
            
            Setting this object to the value invalid(4) has the
            effect of invalidating the corresponding entry.
            That is, it effectively disassociates the mapping
            identified with said entry.
            It is an implementation-specific matter as to whether
            the agent removes an invalidated entry from the table.
            Accordingly, management stations must be prepared to
            receive tabular information from agents that corresponds
            to entries currently not in use.  Proper
            interpretation of such entries requires examination
            of the relevant EntryStatus object.
            
            An existing instance of this object cannot be set to
            createRequest(2).  This object may only be set to
            createRequest(2) when this instance is created.  When
            this object is created, the agent may wish to create
            supplemental object instances with default values
            to complete a conceptual row in this table.  Because the
            
            creation of these default objects is entirely at the option
            of the agent, the manager must not assume that any will be
            created, but may make use of any that are created.
            Immediately after completing the create operation, the agent
            must set this object to underCreation(3).
            
            When in the underCreation(3) state, an entry is allowed to
            exist in a possibly incomplete, possibly inconsistent state,
            usually to allow it to be modified in multiple PDUs.  When in
            this state, an entry is not fully active.
            Entries shall exist in the underCreation(3) state until
            the management station is finished configuring the entry
            and sets this object to valid(1) or aborts, setting this
            object to invalid(4).  If the agent determines that an
            entry has been in the underCreation(3) state for an
            abnormally long time, it may decide that the management
            station has crashed.  If the agent makes this decision,
            it may set this object to invalid(4) to reclaim the
            entry.  A prudent agent will understand that the
            management station may need to wait for human input
            and will allow for that possibility in its
            determination of this abnormally long period.
            
            An entry in the valid(1) state is fully configured and
            consistent and fully represents the configuration or
            operation such a row is intended to represent.  For
            example, it could be a statistical function that is
            configured and active, or a filter that is available
            in the list of filters processed by the packet capture
            process.
            
            A manager is restricted to changing the state of an entry in
            the following ways:
            
                 To:       valid  createRequest  underCreation  invalid
            From:
            valid             OK             NO             OK       OK
            createRequest    N/A            N/A            N/A      N/A
            underCreation     OK             NO             OK       OK
            invalid           NO             NO             NO       OK
            nonExistent       NO             OK             NO       OK
            
            In the table above, it is not applicable to move the state
            from the createRequest state to any other state because the
            manager will never find the variable in that state.  The
            nonExistent state is not a value of the enumeration, rather
            it means that the entryStatus variable does not exist at all.

            An agent may allow an entryStatus variable to change state in
            additional ways, so long as the semantics of the states are
            followed.  This allowance is made to ease the implementation of
            the agent and is made despite the fact that managers should
            never exercise these additional state transitions."
        SYNTAX INTEGER {
            valid(1),
            createRequest(2),
            underCreation(3),
            invalid(4)
            }
        
    statistics        OBJECT IDENTIFIER ::= { rmon 1 }
    history           OBJECT IDENTIFIER ::= { rmon 2 }
    alarm             OBJECT IDENTIFIER ::= { rmon 3 }     
    hosts             OBJECT IDENTIFIER ::= { rmon 4 }
    hostTopN          OBJECT IDENTIFIER ::= { rmon 5 }
    matrix            OBJECT IDENTIFIER ::= { rmon 6 }
    filter            OBJECT IDENTIFIER ::= { rmon 7 }
    capture           OBJECT IDENTIFIER ::= { rmon 8 }
    event             OBJECT IDENTIFIER ::= { rmon 9 }
    rmonConformance   OBJECT IDENTIFIER ::= { rmon 20 }
    
    -- The Ethernet Statistics Group
    --
    -- Implementation of the Ethernet Statistics group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The ethernet statistics group contains statistics measured by the
    -- probe for each monitored interface on this device.  These
    -- statistics take the form of free running counters that start from
    -- zero when a valid entry is created.
    --
    -- This group currently has statistics defined only for
    -- Ethernet interfaces.  Each etherStatsEntry contains statistics
    -- for one Ethernet interface.  The probe must create one
    -- etherStats entry for each monitored Ethernet interface
    -- on the device.
    
    etherStatsTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF EtherStatsEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of Ethernet statistics entries."
        ::= { statistics 1 }

    etherStatsEntry OBJECT-TYPE
        SYNTAX     EtherStatsEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A collection of statistics kept for a particular
            Ethernet interface.  As an example, an instance of the
            etherStatsPkts object might be named etherStatsPkts.1"
        INDEX { etherStatsIndex }
        ::= { etherStatsTable 1 }

    EtherStatsEntry ::= SEQUENCE {
        etherStatsIndex                    Integer32,
        etherStatsDataSource               OBJECT IDENTIFIER,
        etherStatsDropEvents               Counter32,
        etherStatsOctets                   Counter32,
        etherStatsPkts                     Counter32,
        etherStatsBroadcastPkts            Counter32,
        etherStatsMulticastPkts            Counter32,
        etherStatsCRCAlignErrors           Counter32,
        etherStatsUndersizePkts            Counter32,
        etherStatsOversizePkts             Counter32,
        etherStatsFragments                Counter32,
        etherStatsJabbers                  Counter32,
        etherStatsCollisions               Counter32,
        etherStatsPkts64Octets             Counter32,
        etherStatsPkts65to127Octets        Counter32,
        etherStatsPkts128to255Octets       Counter32,
        etherStatsPkts256to511Octets       Counter32,
        etherStatsPkts512to1023Octets      Counter32,
        etherStatsPkts1024to1518Octets     Counter32,
        etherStatsOwner                    OwnerString,
        etherStatsStatus                   EntryStatus
        }

    etherStatsIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of this object uniquely identifies this
            etherStats entry."
        ::= { etherStatsEntry 1 }

    etherStatsDataSource OBJECT-TYPE
        SYNTAX     OBJECT IDENTIFIER
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object identifies the source of the data that
            this etherStats entry is configured to analyze.  This
            source can be any ethernet interface on this device.
            In order to identify a particular interface, this object
            shall identify the instance of the ifIndex object,
            defined in RFC 2233 [17], for the desired interface.
            For example, if an entry were to receive data from
            interface #1, this object would be set to ifIndex.1.
            
            The statistics in this group reflect all packets
            on the local network segment attached to the identified
            interface.
            
            An agent may or may not be able to tell if fundamental
            changes to the media of the interface have occurred and
            necessitate an invalidation of this entry.  For example, a
            hot-pluggable ethernet card could be pulled out and replaced
            by a token-ring card.  In such a case, if the agent has such
            knowledge of the change, it is recommended that it
            invalidate this entry.
            
            This object may not be modified if the associated
            etherStatsStatus object is equal to valid(1)."
        ::= { etherStatsEntry 2 }

    etherStatsDropEvents OBJECT-TYPE
        SYNTAX     Counter32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of events in which packets
            were dropped by the probe due to lack of resources.
            Note that this number is not necessarily the number of
            packets dropped; it is just the number of times this
            condition has been detected."
        ::= { etherStatsEntry 3 }

    etherStatsOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of octets of data (including
            those in bad packets) received on the
            network (excluding framing bits but including
            FCS octets).

            This object can be used as a reasonable estimate of
            10-Megabit ethernet utilization.  If greater precision is
            desired, the etherStatsPkts and etherStatsOctets objects
            should be sampled before and after a common interval.  The
            differences in the sampled values are Pkts and Octets,
            respectively, and the number of seconds in the interval is
            Interval.  These values are used to calculate the Utilization
            as follows:
            
                            Pkts * (9.6 + 6.4) + (Octets * .8)
            Utilization = -------------------------------------
                                  Interval * 10,000
            
            The result of this equation is the value Utilization which
            is the percent utilization of the ethernet segment on a
            scale of 0 to 100 percent."
        ::= { etherStatsEntry 4 }

    etherStatsPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad packets,
            broadcast packets, and multicast packets) received."
        ::= { etherStatsEntry 5 }

    etherStatsBroadcastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of good packets received that were
            directed to the broadcast address.  Note that this
            does not include multicast packets."
        ::= { etherStatsEntry 6 }

    etherStatsMulticastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of good packets received that were
            directed to a multicast address.  Note that this number
            does not include packets directed to the broadcast
            address."
        ::= { etherStatsEntry 7 }

    etherStatsCRCAlignErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received that
            had a length (excluding framing bits, but
            including FCS octets) of between 64 and 1518
            octets, inclusive, but had either a bad
            Frame Check Sequence (FCS) with an integral
            number of octets (FCS Error) or a bad FCS with
            a non-integral number of octets (Alignment Error)."
        ::= { etherStatsEntry 8 }

    etherStatsUndersizePkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received that were
            less than 64 octets long (excluding framing bits,
            but including FCS octets) and were otherwise well
            formed."
        ::= { etherStatsEntry 9 }

    etherStatsOversizePkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received that were
            longer than 1518 octets (excluding framing bits,
            but including FCS octets) and were otherwise
            well formed."
        ::= { etherStatsEntry 10 }

    etherStatsFragments OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received that were less than
            64 octets in length (excluding framing bits but including
            FCS octets) and had either a bad Frame Check Sequence
            (FCS) with an integral number of octets (FCS Error) or a
            bad FCS with a non-integral number of octets (Alignment
            Error).
            
            Note that it is entirely normal for etherStatsFragments to
            increment.  This is because it counts both runts (which are
            normal occurrences due to collisions) and noise hits."
        ::= { etherStatsEntry 11 }

    etherStatsJabbers OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received that were
            longer than 1518 octets (excluding framing bits,
            but including FCS octets), and had either a bad
            Frame Check Sequence (FCS) with an integral number
            of octets (FCS Error) or a bad FCS with a non-integral
            number of octets (Alignment Error).
            
            Note that this definition of jabber is different
            than the definition in IEEE-802.3 section 8.2.1.5
            (10BASE5) and section 10.3.1.4 (10BASE2).  These
            documents define jabber as the condition where any
            packet exceeds 20 ms.  The allowed range to detect
            jabber is between 20 ms and 150 ms."
        ::= { etherStatsEntry 12 }

    etherStatsCollisions OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Collisions"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The best estimate of the total number of collisions
            on this Ethernet segment.
            
            The value returned will depend on the location of the
            RMON probe. Section 8.2.1.3 (10BASE-5) and section
            10.3.1.3 (10BASE-2) of IEEE standard 802.3 states that a
            station must detect a collision, in the receive mode, if
            three or more stations are transmitting simultaneously.  A
            repeater port must detect a collision when two or more
            stations are transmitting simultaneously.  Thus a probe
            placed on a repeater port could record more collisions
            than a probe connected to a station on the same segment
            would.
            
            Probe location plays a much smaller role when considering
            10BASE-T.  14.2.1.4 (10BASE-T) of IEEE standard 802.3
            defines a collision as the simultaneous presence of signals
            on the DO and RD circuits (transmitting and receiving
            at the same time).  A 10BASE-T station can only detect
            collisions when it is transmitting.  Thus probes placed on
            a station and a repeater, should report the same number of
            collisions.
            
            Note also that an RMON probe inside a repeater should
            ideally report collisions between the repeater and one or
            more other hosts (transmit collisions as defined by IEEE
            802.3k) plus receiver collisions observed on any coax
            segments to which the repeater is connected."
        ::= { etherStatsEntry 13 }

    etherStatsPkts64Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were 64 octets in length
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 14 }

    etherStatsPkts65to127Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were between
            65 and 127 octets in length inclusive
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 15 }

    etherStatsPkts128to255Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were between
            128 and 255 octets in length inclusive
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 16 }

    etherStatsPkts256to511Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were between
            256 and 511 octets in length inclusive
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 17 }

    etherStatsPkts512to1023Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were between
            512 and 1023 octets in length inclusive
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 18 }

    etherStatsPkts1024to1518Octets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets (including bad
            packets) received that were between
            1024 and 1518 octets in length inclusive
            (excluding framing bits but including FCS octets)."
        ::= { etherStatsEntry 19 }

    etherStatsOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { etherStatsEntry 20 }

    etherStatsStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this etherStats entry."
        ::= { etherStatsEntry 21 }

    -- The History Control Group
    
    -- Implementation of the History Control group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The history control group controls the periodic statistical
    -- sampling of data from various types of networks.  The
    -- historyControlTable stores configuration entries that each
    -- define an interface, polling period, and other parameters.
    -- Once samples are taken, their data is stored in an entry
    -- in a media-specific table.  Each such entry defines one
    -- sample, and is associated with the historyControlEntry that
    -- caused the sample to be taken.  Each counter in the
    -- etherHistoryEntry counts the same event as its similarly-named
    -- counterpart in the etherStatsEntry, except that each value here
    -- is a cumulative sum during a sampling period.
    --
    -- If the probe keeps track of the time of day, it should start
    -- the first sample of the history at a time such that
    -- when the next hour of the day begins, a sample is
    -- started at that instant.  This tends to make more
    -- user-friendly reports, and enables comparison of reports
    -- from different probes that have relatively accurate time
    -- of day.
    --
    -- The probe is encouraged to add two history control entries
    -- per monitored interface upon initialization that describe a short
    -- term and a long term polling period.  Suggested parameters are 30
    -- seconds for the short term polling period and 30 minutes for
    -- the long term period.

    historyControlTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HistoryControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of history control entries."
        ::= { history 1 }

    historyControlEntry OBJECT-TYPE
        SYNTAX     HistoryControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of parameters that set up a periodic sampling of
            statistics.  As an example, an instance of the
            historyControlInterval object might be named
            historyControlInterval.2"
        INDEX { historyControlIndex }
        ::= { historyControlTable 1 }

    HistoryControlEntry ::= SEQUENCE {
        historyControlIndex             Integer32,
        historyControlDataSource        OBJECT IDENTIFIER,
        historyControlBucketsRequested  Integer32,
        historyControlBucketsGranted    Integer32,
        historyControlInterval          Integer32,
        historyControlOwner             OwnerString,
        historyControlStatus            EntryStatus
        }

    historyControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the
            historyControl table.  Each such entry defines a
            set of samples at a particular interval for an
            interface on the device."
        ::= { historyControlEntry 1 }

    historyControlDataSource OBJECT-TYPE
        SYNTAX     OBJECT IDENTIFIER
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object identifies the source of the data for
            which historical data was collected and
            placed in a media-specific table on behalf of this
            historyControlEntry.  This source can be any
            interface on this device.  In order to identify
            a particular interface, this object shall identify
            the instance of the ifIndex object, defined
            in  RFC 2233 [17], for the desired interface.
            For example, if an entry were to receive data from
            interface #1, this object would be set to ifIndex.1.
            
            The statistics in this group reflect all packets
            on the local network segment attached to the identified
            interface.
            
            An agent may or may not be able to tell if fundamental
            changes to the media of the interface have occurred and
            necessitate an invalidation of this entry.  For example, a
            hot-pluggable ethernet card could be pulled out and replaced
            by a token-ring card.  In such a case, if the agent has such
            knowledge of the change, it is recommended that it
            invalidate this entry.
            
            This object may not be modified if the associated
            historyControlStatus object is equal to valid(1)."
        ::= { historyControlEntry 2 }

    historyControlBucketsRequested OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The requested number of discrete time intervals
            over which data is to be saved in the part of the
            media-specific table associated with this
            historyControlEntry.
            
            When this object is created or modified, the probe
            should set historyControlBucketsGranted as closely to
            this object as is possible for the particular probe
            implementation and available resources."
        DEFVAL { 50 }
        ::= { historyControlEntry 3 }

    historyControlBucketsGranted OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of discrete sampling intervals
            over which data shall be saved in the part of
            the media-specific table associated with this
            historyControlEntry.
            When the associated historyControlBucketsRequested
            object is created or modified, the probe
            should set this object as closely to the requested
            value as is possible for the particular
            probe implementation and available resources.  The
            probe must not lower this value except as a result
            of a modification to the associated
            historyControlBucketsRequested object.
            
            There will be times when the actual number of
            buckets associated with this entry is less than
            the value of this object.  In this case, at the
            end of each sampling interval, a new bucket will
            be added to the media-specific table.
            
            When the number of buckets reaches the value of
            this object and a new bucket is to be added to the
            media-specific table, the oldest bucket associated
            with this historyControlEntry shall be deleted by
            the agent so that the new bucket can be added.
            
            When the value of this object changes to a value less
            than the current value, entries are deleted
            from the media-specific table associated with this
            historyControlEntry.  Enough of the oldest of these
            entries shall be deleted by the agent so that their
            number remains less than or equal to the new value of
            this object.
            
            When the value of this object changes to a value greater
            than the current value, the number of associated media-
            specific entries may be allowed to grow."
        ::= { historyControlEntry 4 }

    historyControlInterval OBJECT-TYPE
        SYNTAX     Integer32 (1..3600)
        UNITS      "Seconds"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The interval in seconds over which the data is
            sampled for each bucket in the part of the
            media-specific table associated with this
            historyControlEntry.  This interval can
            be set to any number of seconds between 1 and
            3600 (1 hour).

            Because the counters in a bucket may overflow at their

            maximum value with no indication, a prudent manager will
            take into account the possibility of overflow in any of
            the associated counters.  It is important to consider the
            minimum time in which any counter could overflow on a
            particular media type and set the historyControlInterval
            object to a value less than this interval.  This is
            typically most important for the 'octets' counter in any
            media-specific table.  For example, on an Ethernet
            network, the etherHistoryOctets counter could overflow
            in about one hour at the Ethernet's maximum
            utilization.
            
            This object may not be modified if the associated
            historyControlStatus object is equal to valid(1)."
        DEFVAL { 1800 }
        ::= { historyControlEntry 5 }

    historyControlOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { historyControlEntry 6 }

    historyControlStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this historyControl entry.
            
            Each instance of the media-specific table associated
            with this historyControlEntry will be deleted by the agent
            if this historyControlEntry is not equal to valid(1)."
        ::= { historyControlEntry 7 }

    -- The Ethernet History Group
    
    -- Implementation of the Ethernet History group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Ethernet History group records periodic statistical samples
    -- from a network and stores them for later retrieval.
    -- Once samples are taken, their data is stored in an entry
    -- in a media-specific table.  Each such entry defines one
    -- sample, and is associated with the historyControlEntry that
    -- caused the sample to be taken.  This group defines the
    -- etherHistoryTable, for Ethernet networks.
    --

    etherHistoryTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF EtherHistoryEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of Ethernet history entries."
        ::= { history 2 }

    etherHistoryEntry OBJECT-TYPE
        SYNTAX     EtherHistoryEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "An historical sample of Ethernet statistics on a particular
            Ethernet interface.  This sample is associated with the
            historyControlEntry which set up the parameters for
            a regular collection of these samples.  As an example, an
            instance of the etherHistoryPkts object might be named
            etherHistoryPkts.2.89"
        INDEX { etherHistoryIndex , etherHistorySampleIndex }
        ::= { etherHistoryTable 1 }

    EtherHistoryEntry ::= SEQUENCE {
        etherHistoryIndex                 Integer32,
        etherHistorySampleIndex           Integer32,
        etherHistoryIntervalStart         TimeTicks,
        etherHistoryDropEvents            Counter32,
        etherHistoryOctets                Counter32,
        etherHistoryPkts                  Counter32,
        etherHistoryBroadcastPkts         Counter32,
        etherHistoryMulticastPkts         Counter32,
        etherHistoryCRCAlignErrors        Counter32,
        etherHistoryUndersizePkts         Counter32,
        etherHistoryOversizePkts          Counter32,
        etherHistoryFragments             Counter32,
        etherHistoryJabbers               Counter32,
        etherHistoryCollisions            Counter32,
        etherHistoryUtilization           Integer32
        }

    etherHistoryIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The history of which this entry is a part.  The
            history identified by a particular value of this
            index is the same history as identified
            by the same value of historyControlIndex."
        ::= { etherHistoryEntry 1 }

    etherHistorySampleIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..2147483647)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies the particular
            sample this entry represents among all samples
            associated with the same historyControlEntry.
            This index starts at 1 and increases by one
            as each new sample is taken."
        ::= { etherHistoryEntry 2 }

    etherHistoryIntervalStart OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime at the start of the interval
            over which this sample was measured.  If the probe
            keeps track of the time of day, it should start
            the first sample of the history at a time such that
            when the next hour of the day begins, a sample is
            started at that instant.  Note that following this
            rule may require the probe to delay collecting the
            first sample of the history, as each sample must be
            of the same interval.  Also note that the sample which
            is currently being collected is not accessible in this
            table until the end of its interval."
        ::= { etherHistoryEntry 3 }

    etherHistoryDropEvents OBJECT-TYPE
        SYNTAX     Counter32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of events in which packets
            were dropped by the probe due to lack of resources
            during this sampling interval.  Note that this number
            is not necessarily the number of packets dropped, it
            is just the number of times this condition has been
            detected."
        ::= { etherHistoryEntry 4 }

    etherHistoryOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of octets of data (including
            those in bad packets) received on the
            network (excluding framing bits but including
            FCS octets)."
        ::= { etherHistoryEntry 5 }

    etherHistoryPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets (including bad packets)
            received during this sampling interval."
        ::= { etherHistoryEntry 6 }

    etherHistoryBroadcastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets received during this
            sampling interval that were directed to the
            broadcast address."
        ::= { etherHistoryEntry 7 }

    etherHistoryMulticastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets received during this
            sampling interval that were directed to a
            multicast address.  Note that this number does not
            include packets addressed to the broadcast address."
        ::= { etherHistoryEntry 8 }

    etherHistoryCRCAlignErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets received during this
            sampling interval that had a length (excluding
            framing bits but including FCS octets) between
            64 and 1518 octets, inclusive, but had either a bad Frame
            Check Sequence (FCS) with an integral number of octets
            (FCS Error) or a bad FCS with a non-integral number
            of octets (Alignment Error)."
        ::= { etherHistoryEntry 9 }
        
    etherHistoryUndersizePkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets received during this
            sampling interval that were less than 64 octets
            long (excluding framing bits but including FCS
            octets) and were otherwise well formed."
        ::= { etherHistoryEntry 10 }

    etherHistoryOversizePkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets received during this
            sampling interval that were longer than 1518
            octets (excluding framing bits but including
            FCS octets) but were otherwise well formed."
        ::= { etherHistoryEntry 11 }
        
    etherHistoryFragments OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The total number of packets received during this
            sampling interval that were less than 64 octets in
            length (excluding framing bits but including FCS
            octets) had either a bad Frame Check Sequence (FCS)
            with an integral number of octets (FCS Error) or a bad
            FCS with a non-integral number of octets (Alignment
            Error).
            
            Note that it is entirely normal for etherHistoryFragments to
            increment.  This is because it counts both runts (which are
            normal occurrences due to collisions) and noise hits."
        ::= { etherHistoryEntry 12 }

    etherHistoryJabbers OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets received during this
            sampling interval that were longer than 1518 octets
            (excluding framing bits but including FCS octets),
            and  had either a bad Frame Check Sequence (FCS)
            with an integral number of octets (FCS Error) or
            a bad FCS with a non-integral number of octets
            (Alignment Error).
            
            Note that this definition of jabber is different
            than the definition in IEEE-802.3 section 8.2.1.5
            (10BASE5) and section 10.3.1.4 (10BASE2).  These
            documents define jabber as the condition where any
            packet exceeds 20 ms.  The allowed range to detect
            jabber is between 20 ms and 150 ms."
        ::= { etherHistoryEntry 13 }

    etherHistoryCollisions OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Collisions"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The best estimate of the total number of collisions
            on this Ethernet segment during this sampling
            interval.
            
            The value returned will depend on the location of the
            RMON probe. Section 8.2.1.3 (10BASE-5) and section
            10.3.1.3 (10BASE-2) of IEEE standard 802.3 states that a
            station must detect a collision, in the receive mode, if
            three or more stations are transmitting simultaneously.  A
            repeater port must detect a collision when two or more
            stations are transmitting simultaneously.  Thus a probe
            placed on a repeater port could record more collisions
            than a probe connected to a station on the same segment
            would.
            
            Probe location plays a much smaller role when considering
            10BASE-T.  14.2.1.4 (10BASE-T) of IEEE standard 802.3
            defines a collision as the simultaneous presence of signals
            on the DO and RD circuits (transmitting and receiving
            at the same time).  A 10BASE-T station can only detect
            collisions when it is transmitting.  Thus probes placed on
            a station and a repeater, should report the same number of
            collisions.
            
            Note also that an RMON probe inside a repeater should
            ideally report collisions between the repeater and one or
            more other hosts (transmit collisions as defined by IEEE
            802.3k) plus receiver collisions observed on any coax
            segments to which the repeater is connected."
        ::= { etherHistoryEntry 14 }

    etherHistoryUtilization OBJECT-TYPE
        SYNTAX     Integer32 (0..10000)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The best estimate of the mean physical layer
            network utilization on this interface during this
            sampling interval, in hundredths of a percent."
        ::= { etherHistoryEntry 15 }

    -- The Alarm Group

    -- Implementation of the Alarm group is optional. The Alarm Group
    -- requires the implementation of the Event group.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Alarm group periodically takes statistical samples from
    -- variables in the probe and compares them to thresholds that have
    -- been configured.  The alarm table stores configuration
    -- entries that each define a variable, polling period, and
    -- threshold parameters.  If a sample is found to cross the
    -- threshold values, an event is generated.  Only variables that
    -- resolve to an ASN.1 primitive type of INTEGER (INTEGER, Integer32,
    -- Counter32, Counter64, Gauge32, or TimeTicks) may be monitored in
    -- this way.
    --

    -- This function has a hysteresis mechanism to limit the generation
    -- of events.  This mechanism generates one event as a threshold
    -- is crossed in the appropriate direction.  No more events are
    -- generated for that threshold until the opposite threshold is
    -- crossed.
    --
    -- In the case of a sampling a deltaValue, a probe may implement
    -- this mechanism with more precision if it takes a delta sample
    -- twice per period, each time comparing the sum of the latest two
    -- samples to the threshold.  This allows the detection of threshold
    -- crossings that span the sampling boundary.  Note that this does
    -- not require any special configuration of the threshold value.
    -- It is suggested that probes implement this more precise algorithm.

    alarmTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF AlarmEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of alarm entries."
        ::= { alarm 1 }
    
    alarmEntry OBJECT-TYPE
        SYNTAX     AlarmEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of parameters that set up a periodic checking
            for alarm conditions.  For example, an instance of the
            alarmValue object might be named alarmValue.8"
        INDEX { alarmIndex }
        ::= { alarmTable 1 }

    AlarmEntry ::= SEQUENCE {
        alarmIndex                    Integer32,
        alarmInterval                 Integer32,
        alarmVariable                 OBJECT IDENTIFIER,
        alarmSampleType               INTEGER,
        alarmValue                    Integer32,
        alarmStartupAlarm             INTEGER,
        alarmRisingThreshold          Integer32,
        alarmFallingThreshold         Integer32,
        alarmRisingEventIndex         Integer32,
        alarmFallingEventIndex        Integer32,
        alarmOwner                    OwnerString,
        alarmStatus                   EntryStatus
        }

    alarmIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the
            alarm table.  Each such entry defines a
            diagnostic sample at a particular interval
            for an object on the device."
        ::= { alarmEntry 1 }

    alarmInterval OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Seconds"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The interval in seconds over which the data is
            sampled and compared with the rising and falling
            thresholds.  When setting this variable, care
            should be taken in the case of deltaValue
            sampling - the interval should be set short enough
            that the sampled variable is very unlikely to
            increase or decrease by more than 2^31 - 1 during
            a single sampling interval.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 2 }

    alarmVariable OBJECT-TYPE
        SYNTAX     OBJECT IDENTIFIER
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The object identifier of the particular variable to be
            sampled.  Only variables that resolve to an ASN.1 primitive
            type of INTEGER (INTEGER, Integer32, Counter32, Counter64,
            Gauge, or TimeTicks) may be sampled.
            
            Because SNMP access control is articulated entirely
            in terms of the contents of MIB views, no access
            control mechanism exists that can restrict the value of
            this object to identify only those objects that exist
            in a particular MIB view.  Because there is thus no
            acceptable means of restricting the read access that
            could be obtained through the alarm mechanism, the
            probe must only grant write access to this object in
            those views that have read access to all objects on
            the probe.
            
            During a set operation, if the supplied variable name is
            not available in the selected MIB view, a badValue error
            must be returned.  If at any time the variable name of
            an established alarmEntry is no longer available in the
            selected MIB view, the probe must change the status of
            this alarmEntry to invalid(4).
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 3 }

    alarmSampleType OBJECT-TYPE
        SYNTAX     INTEGER {
            absoluteValue(1),
            deltaValue(2)
            }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The method of sampling the selected variable and
            calculating the value to be compared against the
            thresholds.  If the value of this object is
            absoluteValue(1), the value of the selected variable
            will be compared directly with the thresholds at the
            end of the sampling interval.  If the value of this
            object is deltaValue(2), the value of the selected
            variable at the last sample will be subtracted from
            the current value, and the difference compared with
            the thresholds.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 4 }

    alarmValue OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of the statistic during the last sampling
            period.  For example, if the sample type is deltaValue,
            this value will be the difference between the samples
            at the beginning and end of the period.  If the sample
            type is absoluteValue, this value will be the sampled
            value at the end of the period.
            This is the value that is compared with the rising and
            falling thresholds.
            
            The value during the current sampling period is not
            made available until the period is completed and will
            remain available until the next period completes."
        ::= { alarmEntry 5 }

    alarmStartupAlarm OBJECT-TYPE
        SYNTAX     INTEGER {
            risingAlarm(1),
            fallingAlarm(2),
            risingOrFallingAlarm(3)
            }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The alarm that may be sent when this entry is first
            set to valid.  If the first sample after this entry
            becomes valid is greater than or equal to the
            risingThreshold and alarmStartupAlarm is equal to
            risingAlarm(1) or risingOrFallingAlarm(3), then a single
            rising alarm will be generated.  If the first sample
            after this entry becomes valid is less than or equal
            to the fallingThreshold and alarmStartupAlarm is equal
            to fallingAlarm(2) or risingOrFallingAlarm(3), then a
            single falling alarm will be generated.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 6 }

    alarmRisingThreshold OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "A threshold for the sampled statistic.  When the current
            sampled value is greater than or equal to this threshold,
            and the value at the last sampling interval was less than
            this threshold, a single event will be generated.
            A single event will also be generated if the first
            sample after this entry becomes valid is greater than or
            equal to this threshold and the associated
            alarmStartupAlarm is equal to risingAlarm(1) or
            risingOrFallingAlarm(3).
            
            After a rising event is generated, another such event
            will not be generated until the sampled value
            falls below this threshold and reaches the
            alarmFallingThreshold.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 7 }

    alarmFallingThreshold OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "A threshold for the sampled statistic.  When the current
            sampled value is less than or equal to this threshold,
            and the value at the last sampling interval was greater than
            this threshold, a single event will be generated.
            A single event will also be generated if the first
            sample after this entry becomes valid is less than or
            equal to this threshold and the associated
            alarmStartupAlarm is equal to fallingAlarm(2) or
            risingOrFallingAlarm(3).
            
            After a falling event is generated, another such event
            will not be generated until the sampled value
            rises above this threshold and reaches the
            alarmRisingThreshold.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 8 }

    alarmRisingEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (0..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The index of the eventEntry that is
            used when a rising threshold is crossed.  The
            eventEntry identified by a particular value of
            this index is the same as identified by the same value
            of the eventIndex object.  If there is no
            corresponding entry in the eventTable, then
            no association exists.  In particular, if this value
            is zero, no associated event will be generated, as
            zero is not a valid event index.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 9 }

    alarmFallingEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (0..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The index of the eventEntry that is
            used when a falling threshold is crossed.  The
            eventEntry identified by a particular value of
            this index is the same as identified by the same value
            of the eventIndex object.  If there is no
            corresponding entry in the eventTable, then
            no association exists.  In particular, if this value
            is zero, no associated event will be generated, as
            zero is not a valid event index.
            
            This object may not be modified if the associated
            alarmStatus object is equal to valid(1)."
        ::= { alarmEntry 10 }

    alarmOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { alarmEntry 11 }

    alarmStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this alarm entry."
        ::= { alarmEntry 12 }

    -- The Host Group
    
    -- Implementation of the Host group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The host group discovers new hosts on the network by
    -- keeping a list of source and destination MAC Addresses seen
    -- in good packets.  For each of these addresses, the host group
    -- keeps a set of statistics.  The hostControlTable controls
    -- which interfaces this function is performed on, and contains
    -- some information about the process.  On behalf of each
    -- hostControlEntry, data is collected on an interface and placed
    -- in both the hostTable and the hostTimeTable.  If the
    -- monitoring device finds itself short of resources, it may
    -- delete entries as needed.  It is suggested that the device
    -- delete the least recently used entries first.
    
    -- The hostTable contains entries for each address discovered on
    -- a particular interface.  Each entry contains statistical
    -- data about that host.  This table is indexed by the
    -- MAC address of the host, through which a random access
    -- may be achieved.
    
    -- The hostTimeTable contains data in the same format as the
    -- hostTable, and must contain the same set of hosts, but is
    -- indexed using hostTimeCreationOrder rather than hostAddress.
    -- The hostTimeCreationOrder is an integer which reflects
    -- the relative order in which a particular entry was discovered
    -- and thus inserted into the table.  As this order, and thus
    -- the index, is among those entries currently in the table,
    -- the index for a particular entry may change if an
    -- (earlier) entry is deleted.  Thus the association between
    -- hostTimeCreationOrder and hostTimeEntry may be broken at
    -- any time.
    
    -- The hostTimeTable has two important uses.  The first is the
    -- fast download of this potentially large table.  Because the
    -- index of this table runs from 1 to the size of the table,
    -- inclusive, its values are predictable.  This allows very
    -- efficient packing of variables into SNMP PDU's and allows
    -- a table transfer to have multiple packets outstanding.
    -- These benefits increase transfer rates tremendously.
    
    -- The second use of the hostTimeTable is the efficient discovery
    -- by the management station of new entries added to the table.
    -- After the management station has downloaded the entire table,
    -- it knows that new entries will be added immediately after the
    -- end of the current table.  It can thus detect new entries there
    -- and retrieve them easily.
    
    -- Because the association between hostTimeCreationOrder and
    -- hostTimeEntry may be broken at any time, the management
    -- station must monitor the related hostControlLastDeleteTime
    -- object.  When the management station thus detects a deletion,
    -- it must assume that any such associations have been broken,
    -- and invalidate any it has stored locally.  This includes
    -- restarting any download of the hostTimeTable that may have been
    -- in progress, as well as rediscovering the end of the
    -- hostTimeTable so that it may detect new entries.  If the
    -- management station does not detect the broken association,
    -- it may continue to refer to a particular host by its
    -- creationOrder while unwittingly retrieving the data associated
    -- with another host entirely.  If this happens while downloading
    -- the host table, the management station may fail to download
    -- all of the entries in the table.
    
    
    hostControlTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HostControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of host table control entries."
        ::= { hosts 1 }
    
    hostControlEntry OBJECT-TYPE
        SYNTAX     HostControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of parameters that set up the discovery of hosts
            on a particular interface and the collection of statistics
            about these hosts.  For example, an instance of the
            hostControlTableSize object might be named
            hostControlTableSize.1"
        INDEX { hostControlIndex }
        ::= { hostControlTable 1 }
    
    HostControlEntry ::= SEQUENCE {
    
        hostControlIndex            Integer32,
        hostControlDataSource       OBJECT IDENTIFIER,
        hostControlTableSize        Integer32,
        hostControlLastDeleteTime   TimeTicks,
        hostControlOwner            OwnerString,
        hostControlStatus           EntryStatus
    }
    
    hostControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the
            hostControl table.  Each such entry defines
            a function that discovers hosts on a particular interface
            and places statistics about them in the hostTable and
            the hostTimeTable on behalf of this hostControlEntry."
        ::= { hostControlEntry 1 }
    
    hostControlDataSource OBJECT-TYPE
        SYNTAX     OBJECT IDENTIFIER
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object identifies the source of the data for
            this instance of the host function.  This source
            can be any interface on this device.  In order
            to identify a particular interface, this object shall
            identify the instance of the ifIndex object, defined
            in RFC 2233 [17], for the desired interface.
            For example, if an entry were to receive data from
            interface #1, this object would be set to ifIndex.1.
    
            The statistics in this group reflect all packets
            on the local network segment attached to the identified
            interface.
    
            An agent may or may not be able to tell if fundamental
            changes to the media of the interface have occurred and
            necessitate an invalidation of this entry.  For example, a
            hot-pluggable ethernet card could be pulled out and replaced
            by a token-ring card.  In such a case, if the agent has such
            knowledge of the change, it is recommended that it
            invalidate this entry.
    
            This object may not be modified if the associated
            hostControlStatus object is equal to valid(1)."
        ::= { hostControlEntry 2 }
    
    hostControlTableSize OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of hostEntries in the hostTable and the
            hostTimeTable associated with this hostControlEntry."
        ::= { hostControlEntry 3 }
    
    hostControlLastDeleteTime OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime when the last entry
            was deleted from the portion of the hostTable
            associated with this hostControlEntry.  If no
            deletions have occurred, this value shall be zero."
        ::= { hostControlEntry 4 }
    
    hostControlOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { hostControlEntry 5 }
    
    hostControlStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this hostControl entry.
    
            If this object is not equal to valid(1), all associated
            entries in the hostTable, hostTimeTable, and the
            hostTopNTable shall be deleted by the agent."
        ::= { hostControlEntry 6 }
    
    hostTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HostEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of host entries."
        ::= { hosts 2 }
    
    hostEntry OBJECT-TYPE
        SYNTAX     HostEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A collection of statistics for a particular host that has
            been discovered on an interface of this device.  For example,
            an instance of the hostOutBroadcastPkts object might be
            named hostOutBroadcastPkts.1.6.8.0.32.27.3.176"
        INDEX { hostIndex, hostAddress }
        ::= { hostTable 1 }
    
    HostEntry ::= SEQUENCE {
        hostAddress             OCTET STRING,
        hostCreationOrder       Integer32,
        hostIndex               Integer32,
        hostInPkts              Counter32,
        hostOutPkts             Counter32,
        hostInOctets            Counter32,
        hostOutOctets           Counter32,
        hostOutErrors           Counter32,
        hostOutBroadcastPkts    Counter32,
        hostOutMulticastPkts    Counter32
    }
    
    hostAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The physical address of this host."
        ::= { hostEntry 1 }
    
    hostCreationOrder OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that defines the relative ordering of
            the creation time of hosts captured for a
            particular hostControlEntry.  This index shall
            be between 1 and N, where N is the value of
            the associated hostControlTableSize.  The ordering
            of the indexes is based on the order of each entry's
            insertion into the table, in which entries added earlier
            have a lower index value than entries added later.
    
            It is important to note that the order for a
            particular entry may change as an (earlier) entry
            is deleted from the table.  Because this order may
            change, management stations should make use of the
            hostControlLastDeleteTime variable in the
            hostControlEntry associated with the relevant
            portion of the hostTable.  By observing
            this variable, the management station may detect
            the circumstances where a previous association
            between a value of hostCreationOrder
            and a hostEntry may no longer hold."
        ::= { hostEntry 2 }
    
    hostIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The set of collected host statistics of which
            this entry is a part.  The set of hosts
            identified by a particular value of this
            index is associated with the hostControlEntry
            as identified by the same value of hostControlIndex."
        ::= { hostEntry 3 }
    
    hostInPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted to this
            address since it was added to the hostTable."
        ::= { hostEntry 4 }
    
    hostOutPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets, including bad packets, transmitted
            by this address since it was added to the hostTable."
        ::= { hostEntry 5 }
    
    hostInOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets transmitted to this address since
            it was added to the hostTable (excluding framing
            bits but including FCS octets), except for those
            octets in bad packets."
        ::= { hostEntry 6 }
    
    hostOutOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets transmitted by this address since
            it was added to the hostTable (excluding framing
            bits but including FCS octets), including those
            octets in bad packets."
        ::= { hostEntry 7 }
    
    hostOutErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of bad packets transmitted by this address
            since this host was added to the hostTable."
        ::= { hostEntry 8 }
    
    hostOutBroadcastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted by this
            address that were directed to the broadcast address
            since this host was added to the hostTable."
        ::= { hostEntry 9 }
    
    hostOutMulticastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted by this
            address that were directed to a multicast address
            since this host was added to the hostTable.
            Note that this number does not include packets
            directed to the broadcast address."
        ::= { hostEntry 10 }
    
    -- host Time Table
    
    hostTimeTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HostTimeEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of time-ordered host table entries."
        ::= { hosts 3 }
    
    hostTimeEntry OBJECT-TYPE
        SYNTAX     HostTimeEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A collection of statistics for a particular host that has
            been discovered on an interface of this device.  This
            collection includes the relative ordering of the creation
            time of this object.  For example, an instance of the
            hostTimeOutBroadcastPkts object might be named
            hostTimeOutBroadcastPkts.1.687"
        INDEX { hostTimeIndex, hostTimeCreationOrder }
        ::= { hostTimeTable 1 }
    
    HostTimeEntry ::= SEQUENCE {
        hostTimeAddress              OCTET STRING,
        hostTimeCreationOrder        Integer32,
        hostTimeIndex                Integer32,
        hostTimeInPkts               Counter32,
        hostTimeOutPkts              Counter32,
        hostTimeInOctets             Counter32,
        hostTimeOutOctets            Counter32,
        hostTimeOutErrors            Counter32,
        hostTimeOutBroadcastPkts     Counter32,
        hostTimeOutMulticastPkts     Counter32
    }
    
    hostTimeAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The physical address of this host."
        ::= { hostTimeEntry 1 }
    
    hostTimeCreationOrder OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in
            the hostTime table among those entries associated
            with the same hostControlEntry.  This index shall
            be between 1 and N, where N is the value of
            the associated hostControlTableSize.  The ordering
            of the indexes is based on the order of each entry's
            insertion into the table, in which entries added earlier
            have a lower index value than entries added later.
            Thus the management station has the ability to
            learn of new entries added to this table without
            downloading the entire table.
    
            It is important to note that the index for a
            particular entry may change as an (earlier) entry
            is deleted from the table.  Because this order may
            change, management stations should make use of the
            hostControlLastDeleteTime variable in the
            hostControlEntry associated with the relevant
            portion of the hostTimeTable.  By observing
            this variable, the management station may detect
            the circumstances where a download of the table
            may have missed entries, and where a previous
            association between a value of hostTimeCreationOrder
            and a hostTimeEntry may no longer hold."
        ::= { hostTimeEntry 2 }
    
    hostTimeIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The set of collected host statistics of which
            this entry is a part.  The set of hosts
            identified by a particular value of this
            index is associated with the hostControlEntry
            as identified by the same value of hostControlIndex."
        ::= { hostTimeEntry 3 }
    
    hostTimeInPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted to this
            address since it was added to the hostTimeTable."
        ::= { hostTimeEntry 4 }
    
    hostTimeOutPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets, including bad packets, transmitted
            by this address since it was added to the hostTimeTable."
        ::= { hostTimeEntry 5 }
    
    hostTimeInOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets transmitted to this address since
            it was added to the hostTimeTable (excluding framing
            bits but including FCS octets), except for those
            octets in bad packets."
        ::= { hostTimeEntry 6 }
    
    hostTimeOutOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets transmitted by this address since
            it was added to the hostTimeTable (excluding framing
            bits but including FCS octets), including those
            octets in bad packets."
        ::= { hostTimeEntry 7 }
    
    hostTimeOutErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of bad packets transmitted by this address
            since this host was added to the hostTimeTable."
        ::= { hostTimeEntry 8 }
    
    hostTimeOutBroadcastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted by this
            address that were directed to the broadcast address
            since this host was added to the hostTimeTable."
        ::= { hostTimeEntry 9 }
    
    hostTimeOutMulticastPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of good packets transmitted by this
            address that were directed to a multicast address
            since this host was added to the hostTimeTable.
            Note that this number does not include packets directed
            to the broadcast address."
        ::= { hostTimeEntry 10 }
    
    -- The Host Top "N" Group
    
    -- Implementation of the Host Top N group is optional. The Host Top N
    -- group requires the implementation of the host group.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Host Top N group is used to prepare reports that describe
    -- the hosts that top a list ordered by one of their statistics.
    -- The available statistics are samples of one of their
    -- base statistics, over an interval specified by the management
    -- station.  Thus, these statistics are rate based.  The management
    -- station also selects how many such hosts are reported.
    
    -- The hostTopNControlTable is used to initiate the generation of
    -- such a report.  The management station may select the parameters
    -- of such a report, such as which interface, which statistic,
    -- how many hosts, and the start and stop times of the sampling.
    -- When the report is prepared, entries are created in the
    -- hostTopNTable associated with the relevant hostTopNControlEntry.
    -- These entries are static for each report after it has been
    -- prepared.
    
    hostTopNControlTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HostTopNControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of top N host control entries."
        ::= { hostTopN 1 }
    
    hostTopNControlEntry OBJECT-TYPE
        SYNTAX     HostTopNControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of parameters that control the creation of a report
            of the top N hosts according to several metrics.  For
            example, an instance of the hostTopNDuration object might
            be named hostTopNDuration.3"
        INDEX { hostTopNControlIndex }
        ::= { hostTopNControlTable 1 }
    
    HostTopNControlEntry ::= SEQUENCE {
        hostTopNControlIndex    Integer32,
        hostTopNHostIndex       Integer32,
        hostTopNRateBase        INTEGER,
        hostTopNTimeRemaining   Integer32,
        hostTopNDuration        Integer32,
        hostTopNRequestedSize   Integer32,
        hostTopNGrantedSize     Integer32,
        hostTopNStartTime       TimeTicks,
        hostTopNOwner           OwnerString,
        hostTopNStatus          EntryStatus
    }
    
    hostTopNControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry
            in the hostTopNControl table.  Each such
            entry defines one top N report prepared for
            one interface."
        ::= { hostTopNControlEntry 1 }
    
    hostTopNHostIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The host table for which a top N report will be prepared
            on behalf of this entry.  The host table identified by a
            particular value of this index is associated with the same
            host table as identified by the same value of
            hostIndex.
    
            This object may not be modified if the associated
            hostTopNStatus object is equal to valid(1)."
        ::= { hostTopNControlEntry 2 }
    
    hostTopNRateBase OBJECT-TYPE
        SYNTAX     INTEGER {
                     hostTopNInPkts(1),
                     hostTopNOutPkts(2),
                     hostTopNInOctets(3),
                     hostTopNOutOctets(4),
                     hostTopNOutErrors(5),
                     hostTopNOutBroadcastPkts(6),
                     hostTopNOutMulticastPkts(7)
                   }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The variable for each host that the hostTopNRate
            variable is based upon.
    
            This object may not be modified if the associated
            hostTopNStatus object is equal to valid(1)."
        ::= { hostTopNControlEntry 3 }
    
    hostTopNTimeRemaining OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Seconds"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The number of seconds left in the report currently being
            collected.  When this object is modified by the management
            station, a new collection is started, possibly aborting
            a currently running report.  The new value is used
            as the requested duration of this report, which is
            loaded into the associated hostTopNDuration object.
    
            When this object is set to a non-zero value, any
            associated hostTopNEntries shall be made
            inaccessible by the monitor.  While the value of this
            object is non-zero, it decrements by one per second until
            it reaches zero.  During this time, all associated
            hostTopNEntries shall remain inaccessible.  At the time
            that this object decrements to zero, the report is made
            accessible in the hostTopNTable.  Thus, the hostTopN
            table needs to be created only at the end of the collection
            interval."
        DEFVAL { 0 }
        ::= { hostTopNControlEntry 4 }
    
    hostTopNDuration OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Seconds"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of seconds that this report has collected
            during the last sampling interval, or if this
            report is currently being collected, the number
            of seconds that this report is being collected
            during this sampling interval.
    
            When the associated hostTopNTimeRemaining object is set,
            this object shall be set by the probe to the same value
            and shall not be modified until the next time
            the hostTopNTimeRemaining is set.
    
            This value shall be zero if no reports have been
            requested for this hostTopNControlEntry."
        DEFVAL { 0 }
        ::= { hostTopNControlEntry 5 }
    
    hostTopNRequestedSize OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The maximum number of hosts requested for the top N
            table.
    
            When this object is created or modified, the probe
            should set hostTopNGrantedSize as closely to this
            object as is possible for the particular probe
            implementation and available resources."
        DEFVAL { 10 }
        ::= { hostTopNControlEntry 6 }
    
    hostTopNGrantedSize OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The maximum number of hosts in the top N table.
    
            When the associated hostTopNRequestedSize object is
            created or modified, the probe should set this
            object as closely to the requested value as is possible
            for the particular implementation and available
            resources. The probe must not lower this value except
            as a result of a set to the associated
            hostTopNRequestedSize object.
    
            Hosts with the highest value of hostTopNRate shall be
            placed in this table in decreasing order of this rate
            until there is no more room or until there are no more
            hosts."
        ::= { hostTopNControlEntry 7 }
    
    hostTopNStartTime OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime when this top N report was
            last started.  In other words, this is the time that
            the associated hostTopNTimeRemaining object was
            modified to start the requested report."
        ::= { hostTopNControlEntry 8 }
    
    hostTopNOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { hostTopNControlEntry 9 }
    
    hostTopNStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this hostTopNControl entry.
    
            If this object is not equal to valid(1), all associated
            hostTopNEntries shall be deleted by the agent."
        ::= { hostTopNControlEntry 10 }
    
    hostTopNTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF HostTopNEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of top N host entries."
        ::= { hostTopN 2 }
    
    hostTopNEntry OBJECT-TYPE
        SYNTAX     HostTopNEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of statistics for a host that is part of a top N
            report.  For example, an instance of the hostTopNRate
            object might be named hostTopNRate.3.10"
        INDEX { hostTopNReport, hostTopNIndex }
        ::= { hostTopNTable 1 }
    
    HostTopNEntry ::= SEQUENCE {
        hostTopNReport                Integer32,
        hostTopNIndex                 Integer32,
        hostTopNAddress               OCTET STRING,
        hostTopNRate                  Integer32
    }
    
    hostTopNReport OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "This object identifies the top N report of which
            this entry is a part.  The set of hosts
            identified by a particular value of this
            object is part of the same report as identified
            by the same value of the hostTopNControlIndex object."
        ::= { hostTopNEntry 1 }
    
    hostTopNIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in
            the hostTopN table among those in the same report.
            This index is between 1 and N, where N is the
            number of entries in this table.  Increasing values
            of hostTopNIndex shall be assigned to entries with
            decreasing values of hostTopNRate until index N
            is assigned to the entry with the lowest value of
            hostTopNRate or there are no more hostTopNEntries."
        ::= { hostTopNEntry 2 }
    
    hostTopNAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The physical address of this host."
        ::= { hostTopNEntry 3 }
    
    hostTopNRate OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The amount of change in the selected variable
            during this sampling interval.  The selected
            variable is this host's instance of the object
            selected by hostTopNRateBase."
        ::= { hostTopNEntry 4 }
    
    -- The Matrix Group
    
    -- Implementation of the Matrix group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Matrix group consists of the matrixControlTable, matrixSDTable
    -- and the matrixDSTable.  These tables store statistics for a
    -- particular conversation between two addresses.  As the device
    -- detects a new conversation, including those to a non-unicast
    -- address, it creates a new entry in both of the matrix tables.
    -- It must only create new entries based on information
    -- received in good packets.  If the monitoring device finds
    -- itself short of resources, it may delete entries as needed.
    -- It is suggested that the device delete the least recently used
    -- entries first.
    
    matrixControlTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF MatrixControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of information entries for the
            traffic matrix on each interface."
        ::= { matrix 1 }
    
    matrixControlEntry OBJECT-TYPE
        SYNTAX     MatrixControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "Information about a traffic matrix on a particular
            interface.  For example, an instance of the
            matrixControlLastDeleteTime object might be named
            matrixControlLastDeleteTime.1"
        INDEX { matrixControlIndex }
        ::= { matrixControlTable 1 }
    
    MatrixControlEntry ::= SEQUENCE {
        matrixControlIndex           Integer32,
        matrixControlDataSource      OBJECT IDENTIFIER,
        matrixControlTableSize       Integer32,
        matrixControlLastDeleteTime  TimeTicks,
        matrixControlOwner           OwnerString,
        matrixControlStatus          EntryStatus
    }
    
    matrixControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the
            matrixControl table.  Each such entry defines
            a function that discovers conversations on a particular
            interface and places statistics about them in the
            matrixSDTable and the matrixDSTable on behalf of this
            matrixControlEntry."
        ::= { matrixControlEntry 1 }
    
    matrixControlDataSource OBJECT-TYPE
        SYNTAX     OBJECT IDENTIFIER
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object identifies the source of
            the data from which this entry creates a traffic matrix.
            This source can be any interface on this device.  In
            order to identify a particular interface, this object
            shall identify the instance of the ifIndex object,
            defined in RFC 2233 [17], for the desired
            interface.  For example, if an entry were to receive data
            from interface #1, this object would be set to ifIndex.1.
    
            The statistics in this group reflect all packets
            on the local network segment attached to the identified
            interface.
    
            An agent may or may not be able to tell if fundamental
            changes to the media of the interface have occurred and
            necessitate an invalidation of this entry.  For example, a
            hot-pluggable ethernet card could be pulled out and replaced
            by a token-ring card.  In such a case, if the agent has such
            knowledge of the change, it is recommended that it
            invalidate this entry.
    
            This object may not be modified if the associated
            matrixControlStatus object is equal to valid(1)."
        ::= { matrixControlEntry 2 }
    
    matrixControlTableSize OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of matrixSDEntries in the matrixSDTable
            for this interface.  This must also be the value of
            the number of entries in the matrixDSTable for this
            interface."
        ::= { matrixControlEntry 3 }
    
    matrixControlLastDeleteTime OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime when the last entry
            was deleted from the portion of the matrixSDTable
            or matrixDSTable associated with this matrixControlEntry.
            If no deletions have occurred, this value shall be
            zero."
        ::= { matrixControlEntry 4 }
    
    matrixControlOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { matrixControlEntry 5 }
    
    matrixControlStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this matrixControl entry.
            If this object is not equal to valid(1), all associated
            entries in the matrixSDTable and the matrixDSTable
            shall be deleted by the agent."
        ::= { matrixControlEntry 6 }
    
    matrixSDTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF MatrixSDEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of traffic matrix entries indexed by
            source and destination MAC address."
        ::= { matrix 2 }
    
    matrixSDEntry OBJECT-TYPE
        SYNTAX     MatrixSDEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A collection of statistics for communications between
            two addresses on a particular interface.  For example,
            an instance of the matrixSDPkts object might be named
            matrixSDPkts.1.6.8.0.32.27.3.176.6.8.0.32.10.8.113"
        INDEX { matrixSDIndex,
                matrixSDSourceAddress, matrixSDDestAddress }
        ::= { matrixSDTable 1 }
    
    MatrixSDEntry ::= SEQUENCE {
        matrixSDSourceAddress       OCTET STRING,
        matrixSDDestAddress         OCTET STRING,
        matrixSDIndex               Integer32,
        matrixSDPkts                Counter32,
        matrixSDOctets              Counter32,
        matrixSDErrors              Counter32
    }
    
    matrixSDSourceAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The source physical address."
        ::= { matrixSDEntry 1 }
    
    matrixSDDestAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The destination physical address."
        ::= { matrixSDEntry 2 }
    
    matrixSDIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The set of collected matrix statistics of which
            this entry is a part.  The set of matrix statistics
            identified by a particular value of this index
            is associated with the same matrixControlEntry
            as identified by the same value of matrixControlIndex."
        ::= { matrixSDEntry 3 }
    
    matrixSDPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets transmitted from the source
            address to the destination address (this number includes
            bad packets)."
        ::= { matrixSDEntry 4 }
    
    matrixSDOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets (excluding framing bits but
            including FCS octets) contained in all packets
            transmitted from the source address to the
            destination address."
        ::= { matrixSDEntry 5 }
    
    matrixSDErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of bad packets transmitted from
            the source address to the destination address."
        ::= { matrixSDEntry 6 }
    
    -- Traffic matrix tables from destination to source
    
    matrixDSTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF MatrixDSEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of traffic matrix entries indexed by
            destination and source MAC address."
        ::= { matrix 3 }
    
    matrixDSEntry OBJECT-TYPE
        SYNTAX     MatrixDSEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A collection of statistics for communications between
            two addresses on a particular interface.  For example,
            an instance of the matrixSDPkts object might be named
            matrixSDPkts.1.6.8.0.32.10.8.113.6.8.0.32.27.3.176"
        INDEX { matrixDSIndex,
                matrixDSDestAddress, matrixDSSourceAddress }
        ::= { matrixDSTable 1 }
    
    MatrixDSEntry ::= SEQUENCE {
        matrixDSSourceAddress       OCTET STRING,
        matrixDSDestAddress         OCTET STRING,
        matrixDSIndex               Integer32,
        matrixDSPkts                Counter32,
        matrixDSOctets              Counter32,
        matrixDSErrors              Counter32
    }
    
    matrixDSSourceAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The source physical address."
        ::= { matrixDSEntry 1 }
    
    matrixDSDestAddress OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The destination physical address."
        ::= { matrixDSEntry 2 }
    
    matrixDSIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The set of collected matrix statistics of which
            this entry is a part.  The set of matrix statistics
            identified by a particular value of this index
            is associated with the same matrixControlEntry
            as identified by the same value of matrixControlIndex."
        ::= { matrixDSEntry 3 }
    
    matrixDSPkts OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets transmitted from the source
            address to the destination address (this number includes
            bad packets)."
        ::= { matrixDSEntry 4 }
    
    matrixDSOctets OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of octets (excluding framing bits
            but including FCS octets) contained in all packets
            transmitted from the source address to the
            destination address."
        ::= { matrixDSEntry 5 }
    
    matrixDSErrors OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of bad packets transmitted from
            the source address to the destination address."
        ::= { matrixDSEntry 6 }
    
    -- The Filter Group
    
    -- Implementation of the Filter group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Filter group allows packets to be captured with an
    -- arbitrary filter expression.  A logical data and
    -- event stream or "channel" is formed by the packets
    -- that match the filter expression.
    --
    -- This filter mechanism allows the creation of an arbitrary
    -- logical expression with which to filter packets.  Each
    -- filter associated with a channel is OR'ed with the others.
    -- Within a filter, any bits checked in the data and status are
    -- AND'ed with respect to other bits in the same filter.  The
    -- NotMask also allows for checking for inequality.  Finally,
    -- the channelAcceptType object allows for inversion of the
    -- whole equation.
    --
    -- If a management station wishes to receive a trap to alert it
    -- that new packets have been captured and are available for
    -- download, it is recommended that it set up an alarm entry that
    -- monitors the value of the relevant channelMatches instance.
    --
    -- The channel can be turned on or off, and can also
    -- generate events when packets pass through it.
    
    filterTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF FilterEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of packet filter entries."
        ::= { filter 1 }
    
    filterEntry OBJECT-TYPE
        SYNTAX     FilterEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of parameters for a packet filter applied on a
            particular interface.  As an example, an instance of the
            filterPktData object might be named filterPktData.12"
        INDEX { filterIndex }
        ::= { filterTable 1 }
    
    FilterEntry ::= SEQUENCE {
        filterIndex                 Integer32,
        filterChannelIndex          Integer32,
        filterPktDataOffset         Integer32,
        filterPktData               OCTET STRING,
        filterPktDataMask           OCTET STRING,
        filterPktDataNotMask        OCTET STRING,
        filterPktStatus             Integer32,
        filterPktStatusMask         Integer32,
        filterPktStatusNotMask      Integer32,
        filterOwner                 OwnerString,
        filterStatus                EntryStatus
    }
    
    filterIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry
            in the filter table.  Each such entry defines
            one filter that is to be applied to every packet
            received on an interface."
        ::= { filterEntry 1 }
    
    filterChannelIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object identifies the channel of which this filter
            is a part.  The filters identified by a particular value
            of this object are associated with the same channel as
            identified by the same value of the channelIndex object."
        ::= { filterEntry 2 }
    
    filterPktDataOffset OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The offset from the beginning of each packet where
            a match of packet data will be attempted.  This offset
            is measured from the point in the physical layer
            packet after the framing bits, if any.  For example,
            in an Ethernet frame, this point is at the beginning of
            the destination MAC address.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        DEFVAL { 0 }
        ::= { filterEntry 3 }
    
    filterPktData OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The data that is to be matched with the input packet.
            For each packet received, this filter and the accompanying
            filterPktDataMask and filterPktDataNotMask will be
            adjusted for the offset.  The only bits relevant to this
            match algorithm are those that have the corresponding
            filterPktDataMask bit equal to one.  The following three
            rules are then applied to every packet:
    
            (1) If the packet is too short and does not have data
                corresponding to part of the filterPktData, the packet
                will fail this data match.
    
            (2) For each relevant bit from the packet with the
                corresponding filterPktDataNotMask bit set to zero, if
                the bit from the packet is not equal to the corresponding
                bit from the filterPktData, then the packet will fail
                this data match.
    
            (3) If for every relevant bit from the packet with the
                corresponding filterPktDataNotMask bit set to one, the
                bit from the packet is equal to the corresponding bit
                from the filterPktData, then the packet will fail this
                data match.
    
            Any packets that have not failed any of the three matches
            above have passed this data match.  In particular, a zero
            length filter will match any packet.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 4 }
    
    filterPktDataMask OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The mask that is applied to the match process.
            After adjusting this mask for the offset, only those
            bits in the received packet that correspond to bits set
            in this mask are relevant for further processing by the
            match algorithm.  The offset is applied to filterPktDataMask
            in the same way it is applied to the filter.  For the
            purposes of the matching algorithm, if the associated
            filterPktData object is longer than this mask, this mask is
            conceptually extended with '1' bits until it reaches the
            length of the filterPktData object.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 5 }
    
    filterPktDataNotMask OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The inversion mask that is applied to the match
            process.  After adjusting this mask for the offset,
            those relevant bits in the received packet that correspond
            to bits cleared in this mask must all be equal to their
            corresponding bits in the filterPktData object for the packet
            to be accepted.  In addition, at least one of those relevant
            bits in the received packet that correspond to bits set in
            this mask must be different to its corresponding bit in the
            filterPktData object.
    
            For the purposes of the matching algorithm, if the associated
            filterPktData object is longer than this mask, this mask is
            conceptually extended with '0' bits until it reaches the
            length of the filterPktData object.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 6 }
    
    filterPktStatus OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status that is to be matched with the input packet.
            The only bits relevant to this match algorithm are those that
            have the corresponding filterPktStatusMask bit equal to one.
            The following two rules are then applied to every packet:
    
            (1) For each relevant bit from the packet status with the
                corresponding filterPktStatusNotMask bit set to zero, if
                the bit from the packet status is not equal to the
                corresponding bit from the filterPktStatus, then the
                packet will fail this status match.
    
            (2) If for every relevant bit from the packet status with the
                corresponding filterPktStatusNotMask bit set to one, the
                bit from the packet status is equal to the corresponding
                bit from the filterPktStatus, then the packet will fail
                this status match.
    
            Any packets that have not failed either of the two matches
            above have passed this status match.  In particular, a zero
            length status filter will match any packet's status.
    
            The value of the packet status is a sum.  This sum
            initially takes the value zero.  Then, for each
            error, E, that has been discovered in this packet,
            2 raised to a value representing E is added to the sum.
            The errors and the bits that represent them are dependent
            on the media type of the interface that this channel
            is receiving packets from.
    
            The errors defined for a packet captured off of an
            Ethernet interface are as follows:
    
                bit #    Error
                    0    Packet is longer than 1518 octets
                    1    Packet is shorter than 64 octets
                    2    Packet experienced a CRC or Alignment error
    
            For example, an Ethernet fragment would have a
            value of 6 (2^1 + 2^2).
    
            As this MIB is expanded to new media types, this object
            will have other media-specific errors defined.
    
            For the purposes of this status matching algorithm, if the
            packet status is longer than this filterPktStatus object,
            this object is conceptually extended with '0' bits until it
            reaches the size of the packet status.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 7 }
    
    filterPktStatusMask OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The mask that is applied to the status match process.
            Only those bits in the received packet that correspond to
            bits set in this mask are relevant for further processing
            by the status match algorithm.  For the purposes
            of the matching algorithm, if the associated filterPktStatus
            object is longer than this mask, this mask is conceptually
            extended with '1' bits until it reaches the size of the
            filterPktStatus.  In addition, if a packet status is longer
            than this mask, this mask is conceptually extended with '0'
            bits until it reaches the size of the packet status.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 8 }
    
    filterPktStatusNotMask OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The inversion mask that is applied to the status match
            process.  Those relevant bits in the received packet status
            that correspond to bits cleared in this mask must all be
            equal to their corresponding bits in the filterPktStatus
            object for the packet to be accepted.  In addition, at least
            one of those relevant bits in the received packet status
            that correspond to bits set in this mask must be different
            to its corresponding bit in the filterPktStatus object for
            the packet to be accepted.
    
            For the purposes of the matching algorithm, if the associated
            filterPktStatus object or a packet status is longer than this
            mask, this mask is conceptually extended with '0' bits until
            it reaches the longer of the lengths of the filterPktStatus
            object and the packet status.
    
            This object may not be modified if the associated
            filterStatus object is equal to valid(1)."
        ::= { filterEntry 9 }
    
    filterOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { filterEntry 10 }
    
    filterStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this filter entry."
        ::= { filterEntry 11 }
    
    channelTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF ChannelEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of packet channel entries."
        ::= { filter 2 }
    
    channelEntry OBJECT-TYPE
        SYNTAX     ChannelEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of parameters for a packet channel applied on a
            particular interface.  As an example, an instance of the
            channelMatches object might be named channelMatches.3"
        INDEX { channelIndex }
        ::= { channelTable 1 }
    
    ChannelEntry ::= SEQUENCE {
        channelIndex                 Integer32,
        channelIfIndex               Integer32,
        channelAcceptType            INTEGER,
        channelDataControl           INTEGER,
        channelTurnOnEventIndex      Integer32,
        channelTurnOffEventIndex     Integer32,
        channelEventIndex            Integer32,
        channelEventStatus           INTEGER,
        channelMatches               Counter32,
        channelDescription           DisplayString,
        channelOwner                 OwnerString,
        channelStatus                EntryStatus
    }
    
    channelIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the channel
            table.  Each such entry defines one channel, a logical
            data and event stream.
    
            It is suggested that before creating a channel, an
            application should scan all instances of the
            filterChannelIndex object to make sure that there are no
            pre-existing filters that would be inadvertently be linked
            to the channel."
        ::= { channelEntry 1 }
    
    channelIfIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The value of this object uniquely identifies the
            interface on this remote network monitoring device to which
            the associated filters are applied to allow data into this
            channel.  The interface identified by a particular value
            of this object is the same interface as identified by the
            same value of the ifIndex object, defined in RFC 2233 [17].
    
            The filters in this group are applied to all packets on
            the local network segment attached to the identified
            interface.
    
            An agent may or may not be able to tell if fundamental
            changes to the media of the interface have occurred and
            necessitate an invalidation of this entry.  For example, a
            hot-pluggable ethernet card could be pulled out and replaced
            by a token-ring card.  In such a case, if the agent has such
            knowledge of the change, it is recommended that it
            invalidate this entry.
    
            This object may not be modified if the associated
            channelStatus object is equal to valid(1)."
        ::= { channelEntry 2 }
    
    channelAcceptType OBJECT-TYPE
        SYNTAX     INTEGER {
                     acceptMatched(1),
                     acceptFailed(2)
                   }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object controls the action of the filters
            associated with this channel.  If this object is equal
            to acceptMatched(1), packets will be accepted to this
            channel if they are accepted by both the packet data and
            packet status matches of an associated filter.  If
            this object is equal to acceptFailed(2), packets will
            be accepted to this channel only if they fail either
            the packet data match or the packet status match of
            each of the associated filters.
    
            In particular, a channel with no associated filters will
            match no packets if set to acceptMatched(1) case and will
            match all packets in the acceptFailed(2) case.
    
            This object may not be modified if the associated
            channelStatus object is equal to valid(1)."
        ::= { channelEntry 3 }
    
    channelDataControl OBJECT-TYPE
        SYNTAX     INTEGER {
                     on(1),
                     off(2)
                   }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "This object controls the flow of data through this channel.
            If this object is on(1), data, status and events flow
            through this channel.  If this object is off(2), data,
            status and events will not flow through this channel."
        DEFVAL { off }
        ::= { channelEntry 4 }
    
    channelTurnOnEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (0..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The value of this object identifies the event
            that is configured to turn the associated
            channelDataControl from off to on when the event is
            generated.  The event identified by a particular value
            of this object is the same event as identified by the
            same value of the eventIndex object.  If there is no
            corresponding entry in the eventTable, then no
            association exists.  In fact, if no event is intended
            for this channel, channelTurnOnEventIndex must be
            set to zero, a non-existent event index.
            This object may not be modified if the associated
            channelStatus object is equal to valid(1)."
        ::= { channelEntry 5 }
    
    channelTurnOffEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (0..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The value of this object identifies the event
            that is configured to turn the associated
            channelDataControl from on to off when the event is
            generated.  The event identified by a particular value
            of this object is the same event as identified by the
            same value of the eventIndex object.  If there is no
            corresponding entry in the eventTable, then no
            association exists.  In fact, if no event is intended
            for this channel, channelTurnOffEventIndex must be
            set to zero, a non-existent event index.
    
            This object may not be modified if the associated
            channelStatus object is equal to valid(1)."
        ::= { channelEntry 6 }
    
    channelEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (0..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The value of this object identifies the event
            that is configured to be generated when the
            associated channelDataControl is on and a packet
            is matched.  The event identified by a particular value
            of this object is the same event as identified by the
            same value of the eventIndex object.  If there is no
            corresponding entry in the eventTable, then no
            association exists.  In fact, if no event is intended
            for this channel, channelEventIndex must be
            set to zero, a non-existent event index.
    
            This object may not be modified if the associated
            channelStatus object is equal to valid(1)."
        ::= { channelEntry 7 }
    
    channelEventStatus OBJECT-TYPE
        SYNTAX     INTEGER {
                     eventReady(1),
                     eventFired(2),
                     eventAlwaysReady(3)
                   }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The event status of this channel.
    
            If this channel is configured to generate events
            when packets are matched, a means of controlling
            the flow of those events is often needed.  When
            this object is equal to eventReady(1), a single
            event may be generated, after which this object
            will be set by the probe to eventFired(2).  While
            in the eventFired(2) state, no events will be
            generated until the object is modified to
            eventReady(1) (or eventAlwaysReady(3)).  The
            management station can thus easily respond to a
            notification of an event by re-enabling this object.
    
            If the management station wishes to disable this
            flow control and allow events to be generated
            at will, this object may be set to
            eventAlwaysReady(3).  Disabling the flow control
            is discouraged as it can result in high network
            traffic or other performance problems."
        DEFVAL { eventReady }
        ::= { channelEntry 8 }
    
    channelMatches OBJECT-TYPE
        SYNTAX     Counter32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of times this channel has matched a packet.
            Note that this object is updated even when
            channelDataControl is set to off."
        ::= { channelEntry 9 }
    
    channelDescription OBJECT-TYPE
        SYNTAX     DisplayString (SIZE (0..127))
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "A comment describing this channel."
        ::= { channelEntry 10 }
    
    channelOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { channelEntry 11 }
    
    channelStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this channel entry."
        ::= { channelEntry 12 }
    
    -- The Packet Capture Group
    
    -- Implementation of the Packet Capture group is optional. The Packet
    -- Capture Group requires implementation of the Filter Group.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Packet Capture group allows packets to be captured
    -- upon a filter match.  The bufferControlTable controls
    -- the captured packets output from a channel that is
    -- associated with it.  The captured packets are placed
    -- in entries in the captureBufferTable.  These entries are
    -- associated with the bufferControlEntry on whose behalf they
    -- were stored.
    
    bufferControlTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF BufferControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of buffers control entries."
        ::= { capture 1 }
    
    bufferControlEntry OBJECT-TYPE
        SYNTAX     BufferControlEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of parameters that control the collection of a stream
            of packets that have matched filters.  As an example, an
            instance of the bufferControlCaptureSliceSize object might
            be named bufferControlCaptureSliceSize.3"
    
        INDEX { bufferControlIndex }
        ::= { bufferControlTable 1 }
    
    BufferControlEntry ::= SEQUENCE {
        bufferControlIndex                Integer32,
        bufferControlChannelIndex         Integer32,
        bufferControlFullStatus           INTEGER,
        bufferControlFullAction           INTEGER,
        bufferControlCaptureSliceSize     Integer32,
        bufferControlDownloadSliceSize    Integer32,
        bufferControlDownloadOffset       Integer32,
        bufferControlMaxOctetsRequested   Integer32,
        bufferControlMaxOctetsGranted     Integer32,
        bufferControlCapturedPackets      Integer32,
        bufferControlTurnOnTime           TimeTicks,
        bufferControlOwner                OwnerString,
        bufferControlStatus               EntryStatus
    }
    
    bufferControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry
            in the bufferControl table.  The value of this
            index shall never be zero.  Each such
            entry defines one set of packets that is
            captured and controlled by one or more filters."
        ::= { bufferControlEntry 1 }
    
    bufferControlChannelIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "An index that identifies the channel that is the
            source of packets for this bufferControl table.
            The channel identified by a particular value of this
            index is the same as identified by the same value of
            the channelIndex object.
    
            This object may not be modified if the associated
            bufferControlStatus object is equal to valid(1)."
        ::= { bufferControlEntry 2 }
    
    bufferControlFullStatus OBJECT-TYPE
        SYNTAX     INTEGER {
                     spaceAvailable(1),
                     full(2)
                   }
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "This object shows whether the buffer has room to
            accept new packets or if it is full.
    
            If the status is spaceAvailable(1), the buffer is
            accepting new packets normally.  If the status is
            full(2) and the associated bufferControlFullAction
            object is wrapWhenFull, the buffer is accepting new
            packets by deleting enough of the oldest packets
            to make room for new ones as they arrive.  Otherwise,
            if the status is full(2) and the
            bufferControlFullAction object is lockWhenFull,
            then the buffer has stopped collecting packets.
    
            When this object is set to full(2) the probe must
            not later set it to spaceAvailable(1) except in the
            case of a significant gain in resources such as
            an increase of bufferControlOctetsGranted.  In
            particular, the wrap-mode action of deleting old
            packets to make room for newly arrived packets
            must not affect the value of this object."
        ::= { bufferControlEntry 3 }
    
    bufferControlFullAction OBJECT-TYPE
        SYNTAX     INTEGER {
                     lockWhenFull(1),
                     wrapWhenFull(2)    -- FIFO
                   }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "Controls the action of the buffer when it
            reaches the full status.  When in the lockWhenFull(1)
            state and a packet is added to the buffer that
            fills the buffer, the bufferControlFullStatus will
            be set to full(2) and this buffer will stop capturing
            packets."
        ::= { bufferControlEntry 4 }
    
    bufferControlCaptureSliceSize OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The maximum number of octets of each packet
            that will be saved in this capture buffer.
            For example, if a 1500 octet packet is received by
            the probe and this object is set to 500, then only
            500 octets of the packet will be stored in the
            associated capture buffer.  If this variable is set
            to 0, the capture buffer will save as many octets
            as is possible.
    
            This object may not be modified if the associated
            bufferControlStatus object is equal to valid(1)."
        DEFVAL { 100 }
        ::= { bufferControlEntry 5 }
    
    bufferControlDownloadSliceSize OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The maximum number of octets of each packet
            in this capture buffer that will be returned in
            an SNMP retrieval of that packet.  For example,
            if 500 octets of a packet have been stored in the
            associated capture buffer, the associated
            bufferControlDownloadOffset is 0, and this
            object is set to 100, then the captureBufferPacket
            object that contains the packet will contain only
            the first 100 octets of the packet.
    
            A prudent manager will take into account possible
            interoperability or fragmentation problems that may
            occur if the download slice size is set too large.
            In particular, conformant SNMP implementations are not
            required to accept messages whose length exceeds 484
            octets, although they are encouraged to support larger
            datagrams whenever feasible."
        DEFVAL { 100 }
        ::= { bufferControlEntry 6 }
    
    bufferControlDownloadOffset OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The offset of the first octet of each packet
            in this capture buffer that will be returned in
            an SNMP retrieval of that packet.  For example,
            if 500 octets of a packet have been stored in the
            associated capture buffer and this object is set to
            100, then the captureBufferPacket object that
            contains the packet will contain bytes starting
            100 octets into the packet."
        DEFVAL { 0 }
        ::= { bufferControlEntry 7 }
    
    bufferControlMaxOctetsRequested OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The requested maximum number of octets to be
            saved in this captureBuffer, including any
            implementation-specific overhead. If this variable
            is set to -1, the capture buffer will save as many
            octets as is possible.
    
            When this object is created or modified, the probe
            should set bufferControlMaxOctetsGranted as closely
            to this object as is possible for the particular probe
            implementation and available resources.  However, if
            the object has the special value of -1, the probe
            must set bufferControlMaxOctetsGranted to -1."
        DEFVAL { -1 }
        ::= { bufferControlEntry 8 }
    
    bufferControlMaxOctetsGranted OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The maximum number of octets that can be
            saved in this captureBuffer, including overhead.
            If this variable is -1, the capture buffer will save
            as many octets as possible.
    
            When the bufferControlMaxOctetsRequested object is
            created or modified, the probe should set this object
            as closely to the requested value as is possible for the
            particular probe implementation and available resources.
            However, if the request object has the special value
            of -1, the probe must set this object to -1.
    
            The probe must not lower this value except as a result of
            a modification to the associated
            bufferControlMaxOctetsRequested object.
    
            When this maximum number of octets is reached
            and a new packet is to be added to this
            capture buffer and the corresponding
            bufferControlFullAction is set to wrapWhenFull(2),
            enough of the oldest packets associated with this
            capture buffer shall be deleted by the agent so
            that the new packet can be added.  If the corresponding
            bufferControlFullAction is set to lockWhenFull(1),
            the new packet shall be discarded.  In either case,
            the probe must set bufferControlFullStatus to
            full(2).
    
            When the value of this object changes to a value less
            than the current value, entries are deleted from
            the captureBufferTable associated with this
            bufferControlEntry.  Enough of the
            oldest of these captureBufferEntries shall be
            deleted by the agent so that the number of octets
            used remains less than or equal to the new value of
            this object.
    
            When the value of this object changes to a value greater
            than the current value, the number of associated
            captureBufferEntries may be allowed to grow."
        ::= { bufferControlEntry 9 }
    
    bufferControlCapturedPackets OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Packets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of packets currently in this captureBuffer."
        ::= { bufferControlEntry 10 }
    
    bufferControlTurnOnTime OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime when this capture buffer was
            first turned on."
        ::= { bufferControlEntry 11 }
    
    bufferControlOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it."
        ::= { bufferControlEntry 12 }
    
    bufferControlStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this buffer Control Entry."
        ::= { bufferControlEntry 13 }
    
    captureBufferTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF CaptureBufferEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of packets captured off of a channel."
        ::= { capture 2 }
    
    captureBufferEntry OBJECT-TYPE
        SYNTAX     CaptureBufferEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A packet captured off of an attached network.  As an
            example, an instance of the captureBufferPacketData
            object might be named captureBufferPacketData.3.1783"
        INDEX { captureBufferControlIndex, captureBufferIndex }
        ::= { captureBufferTable 1 }
    
    CaptureBufferEntry ::= SEQUENCE {
        captureBufferControlIndex   Integer32,
        captureBufferIndex          Integer32,
        captureBufferPacketID       Integer32,
        captureBufferPacketData     OCTET STRING,
        captureBufferPacketLength   Integer32,
        captureBufferPacketTime     Integer32,
        captureBufferPacketStatus   Integer32
    }
    captureBufferControlIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The index of the bufferControlEntry with which
            this packet is associated."
        ::= { captureBufferEntry 1 }
    
    captureBufferIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..2147483647)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry
            in the captureBuffer table associated with a
            particular bufferControlEntry.  This index will
            start at 1 and increase by one for each new packet
            added with the same captureBufferControlIndex.
    
            Should this value reach 2147483647, the next packet
            added with the same captureBufferControlIndex shall
            cause this value to wrap around to 1."
        ::= { captureBufferEntry 2 }
    
    captureBufferPacketID OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that describes the order of packets
            that are received on a particular interface.
            The packetID of a packet captured on an
            interface is defined to be greater than the
            packetID's of all packets captured previously on
            the same interface.  As the captureBufferPacketID
            object has a maximum positive value of 2^31 - 1,
            any captureBufferPacketID object shall have the
            value of the associated packet's packetID mod 2^31."
        ::= { captureBufferEntry 3 }
    
    captureBufferPacketData OBJECT-TYPE
        SYNTAX     OCTET STRING
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The data inside the packet, starting at the beginning
            of the packet plus any offset specified in the
            associated bufferControlDownloadOffset, including any
            link level headers.  The length of the data in this object
            is the minimum of the length of the captured packet minus
            the offset, the length of the associated
            bufferControlCaptureSliceSize minus the offset, and the
            associated bufferControlDownloadSliceSize.  If this minimum
            is less than zero, this object shall have a length of zero."
        ::= { captureBufferEntry 4 }
    
    captureBufferPacketLength OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Octets"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The actual length (off the wire) of the packet stored
            in this entry, including FCS octets."
        ::= { captureBufferEntry 5 }
    
    captureBufferPacketTime OBJECT-TYPE
        SYNTAX     Integer32
        UNITS      "Milliseconds"
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The number of milliseconds that had passed since
            this capture buffer was first turned on when this
            packet was captured."
        ::= { captureBufferEntry 6 }
    
    captureBufferPacketStatus OBJECT-TYPE
        SYNTAX     Integer32
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "A value which indicates the error status of this packet.
    
            The value of this object is defined in the same way as
            filterPktStatus.  The value is a sum.  This sum
            initially takes the value zero.  Then, for each
            error, E, that has been discovered in this packet,
            2 raised to a value representing E is added to the sum.
    
            The errors defined for a packet captured off of an
            Ethernet interface are as follows:
    
                bit #    Error
                    0    Packet is longer than 1518 octets
                    1    Packet is shorter than 64 octets
                    2    Packet experienced a CRC or Alignment error
                    3    First packet in this capture buffer after
                         it was detected that some packets were
                         not processed correctly.
                    4    Packet's order in buffer is only approximate
                         (May only be set for packets sent from
                         the probe)
    
            For example, an Ethernet fragment would have a
            value of 6 (2^1 + 2^2).
    
            As this MIB is expanded to new media types, this object
            will have other media-specific errors defined."
        ::= { captureBufferEntry 7 }
    
    -- The Event Group
    
    -- Implementation of the Event group is optional.
    -- Consult the MODULE-COMPLIANCE macro for the authoritative
    -- conformance information for this MIB.
    --
    -- The Event group controls the generation and notification
    -- of events from this device.  Each entry in the eventTable
    -- describes the parameters of the event that can be triggered.
    -- Each event entry is fired by an associated condition located
    -- elsewhere in the MIB.  An event entry may also be associated
    -- with a function elsewhere in the MIB that will be executed
    -- when the event is generated.  For example, a channel may
    -- be turned on or off by the firing of an event.
    --
    -- Each eventEntry may optionally specify that a log entry
    -- be created on its behalf whenever the event occurs.
    -- Each entry may also specify that notification should
    -- occur by way of SNMP trap messages.  In this case, the
    -- community for the trap message is given in the associated
    -- eventCommunity object.  The enterprise and specific trap
    -- fields of the trap are determined by the condition that
    -- triggered the event.  Two traps are defined: risingAlarm and
    -- fallingAlarm.  If the eventTable is triggered by a condition
    -- specified elsewhere, the enterprise and specific trap fields
    -- must be specified for traps generated for that condition.

    eventTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF EventEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of events to be generated."
        ::= { event 1 }

    eventEntry OBJECT-TYPE
        SYNTAX     EventEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of parameters that describe an event to be generated
            when certain conditions are met.  As an example, an instance
            of the eventLastTimeSent object might be named
            eventLastTimeSent.6"
        INDEX { eventIndex }
        ::= { eventTable 1 }

    EventEntry ::= SEQUENCE {
        eventIndex          Integer32,
        eventDescription    DisplayString,
        eventType           INTEGER,
        eventCommunity      OCTET STRING,
        eventLastTimeSent   TimeTicks,
        eventOwner          OwnerString,
        eventStatus         EntryStatus
        }

    eventIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry in the
            event table.  Each such entry defines one event that
            is to be generated when the appropriate conditions
            occur."
        ::= { eventEntry 1 }

    eventDescription OBJECT-TYPE
        SYNTAX     DisplayString (SIZE (0..127))
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "A comment describing this event entry."
        ::= { eventEntry 2 }
    
    eventType OBJECT-TYPE
        SYNTAX     INTEGER {
            none(1),
            log(2),
            snmptrap(3),    -- send an SNMP trap
            logandtrap(4)
            }
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The type of notification that the probe will make
            about this event.  In the case of log, an entry is
            made in the log table for each event.  In the case of
            snmp-trap, an SNMP trap is sent to one or more
            management stations."
        ::= { eventEntry 3 }
    
    eventCommunity OBJECT-TYPE
        SYNTAX     OCTET STRING (SIZE (0..127))
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "If an SNMP trap is to be sent, it will be sent to
            the SNMP community specified by this octet string."
        ::= { eventEntry 4 }
    
    eventLastTimeSent OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime at the time this event
            entry last generated an event.  If this entry has
            not generated any events, this value will be
            zero."
        ::= { eventEntry 5 }
    
    eventOwner OBJECT-TYPE
        SYNTAX     OwnerString
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The entity that configured this entry and is therefore
            using the resources assigned to it.
            
            If this object contains a string starting with 'monitor'
            and has associated entries in the log table, all connected
            management stations should retrieve those log entries,
            as they may have significance to all management stations
            connected to this device"
        ::= { eventEntry 6 }
    
    eventStatus OBJECT-TYPE
        SYNTAX     EntryStatus
        MAX-ACCESS read-create
        STATUS     current
        DESCRIPTION
            "The status of this event entry.
            
            If this object is not equal to valid(1), all associated
            log entries shall be deleted by the agent."
        ::= { eventEntry 7 }
    
    --
    logTable OBJECT-TYPE
        SYNTAX     SEQUENCE OF LogEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A list of events that have been logged."
        ::= { event 2 }
    
    logEntry OBJECT-TYPE
        SYNTAX     LogEntry
        MAX-ACCESS not-accessible
        STATUS     current
        DESCRIPTION
            "A set of data describing an event that has been
            logged.  For example, an instance of the logDescription
            object might be named logDescription.6.47"
        INDEX { logEventIndex, logIndex }
        ::= { logTable 1 }
    
    LogEntry ::= SEQUENCE {
        logEventIndex           Integer32,
        logIndex                Integer32,
        logTime                 TimeTicks,
        logDescription          DisplayString
        }
    
    logEventIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..65535)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The event entry that generated this log
            entry.  The log identified by a particular
            value of this index is associated with the same
            eventEntry as identified by the same value
            of eventIndex."
        ::= { logEntry 1 }
    
    logIndex OBJECT-TYPE
        SYNTAX     Integer32 (1..2147483647)
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An index that uniquely identifies an entry
            in the log table amongst those generated by the
            same eventEntries.  These indexes are
            assigned beginning with 1 and increase by one
            with each new log entry.  The association
            between values of logIndex and logEntries
            is fixed for the lifetime of each logEntry.
            The agent may choose to delete the oldest
            instances of logEntry as required because of
            lack of memory.  It is an implementation-specific
            matter as to when this deletion may occur."
        ::= { logEntry 2 }
    
    logTime OBJECT-TYPE
        SYNTAX     TimeTicks
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "The value of sysUpTime when this log entry was created."
        ::= { logEntry 3 }
    
    logDescription OBJECT-TYPE
        SYNTAX     DisplayString (SIZE (0..255))
        MAX-ACCESS read-only
        STATUS     current
        DESCRIPTION
            "An implementation dependent description of the
            event that activated this log entry."
        ::= { logEntry 4 }
    
    --  Remote Network Monitoring Traps
    
    rmonEventsV2 OBJECT-IDENTITY
        STATUS      current
        DESCRIPTION "Definition point for RMON notifications."
        ::= { rmon 0 }
    
    risingAlarm NOTIFICATION-TYPE
        OBJECTS  { alarmIndex, alarmVariable, alarmSampleType,
        alarmValue, alarmRisingThreshold }
        STATUS   current
        DESCRIPTION
            "The SNMP trap that is generated when an alarm
            entry crosses its rising threshold and generates
            an event that is configured for sending SNMP
            traps."
        ::= { rmonEventsV2 1 }
    
    fallingAlarm NOTIFICATION-TYPE
        OBJECTS { alarmIndex, alarmVariable, alarmSampleType,
        alarmValue, alarmFallingThreshold }
        STATUS    current
        DESCRIPTION
            "The SNMP trap that is generated when an alarm
            entry crosses its falling threshold and generates
            an event that is configured for sending SNMP
            traps."
        ::= { rmonEventsV2 2 }

    -- Conformance information

    rmonCompliances OBJECT IDENTIFIER ::= { rmonConformance 9 }
    rmonGroups      OBJECT IDENTIFIER ::= { rmonConformance 10 }
    
    -- Compliance Statements
    rmonCompliance MODULE-COMPLIANCE
        STATUS current
        DESCRIPTION
            "The requirements for conformance to the RMON MIB. At least
            one of the groups in this module must be implemented to
            conform to the RMON MIB. Implementations of this MIB
            must also implement the system group of MIB-II [16] and the
            IF-MIB [17]."
        MODULE -- this module
    
        GROUP rmonEtherStatsGroup
            DESCRIPTION
                "The RMON Ethernet Statistics Group is optional."
        
        GROUP rmonHistoryControlGroup
            DESCRIPTION
                "The RMON History Control Group is optional."
        
        GROUP rmonEthernetHistoryGroup
            DESCRIPTION
                "The RMON Ethernet History Group is optional."
        
        GROUP rmonAlarmGroup
            DESCRIPTION
                "The RMON Alarm Group is optional."
        
        GROUP rmonHostGroup
            DESCRIPTION
                "The RMON Host Group is mandatory when the
                rmonHostTopNGroup is implemented."
        
        GROUP rmonHostTopNGroup
            DESCRIPTION
                "The RMON Host Top N Group is optional."
        
        GROUP rmonMatrixGroup
            DESCRIPTION
                "The RMON Matrix Group is optional."
        
        GROUP rmonFilterGroup
            DESCRIPTION
                "The RMON Filter Group is mandatory when the
                rmonPacketCaptureGroup is implemented."
        
        GROUP rmonPacketCaptureGroup
            DESCRIPTION
                "The RMON Packet Capture Group is optional."

        GROUP rmonEventGroup
          DESCRIPTION
              "The RMON Event Group is mandatory when the
              rmonAlarmGroup is implemented."
        ::= { rmonCompliances 1 }

    rmonEtherStatsGroup OBJECT-GROUP
        OBJECTS {
            etherStatsIndex, etherStatsDataSource,
            etherStatsDropEvents, etherStatsOctets, etherStatsPkts,
            etherStatsBroadcastPkts, etherStatsMulticastPkts,
            etherStatsCRCAlignErrors, etherStatsUndersizePkts,
            etherStatsOversizePkts, etherStatsFragments,
            etherStatsJabbers, etherStatsCollisions,
            etherStatsPkts64Octets, etherStatsPkts65to127Octets,
            etherStatsPkts128to255Octets,
            etherStatsPkts256to511Octets,
            etherStatsPkts512to1023Octets,
            etherStatsPkts1024to1518Octets,
            etherStatsOwner, etherStatsStatus
        }
        STATUS current
        DESCRIPTION
            "The RMON Ethernet Statistics Group."
        ::= { rmonGroups 1 }

    rmonHistoryControlGroup OBJECT-GROUP
        OBJECTS {
            historyControlIndex, historyControlDataSource,
            historyControlBucketsRequested,
            historyControlBucketsGranted, historyControlInterval,
            historyControlOwner, historyControlStatus
        }
        STATUS current
        DESCRIPTION
            "The RMON History Control Group."
        ::= { rmonGroups 2 }

    rmonEthernetHistoryGroup OBJECT-GROUP
        OBJECTS {
            etherHistoryIndex, etherHistorySampleIndex,
            etherHistoryIntervalStart, etherHistoryDropEvents,
            etherHistoryOctets, etherHistoryPkts,
            etherHistoryBroadcastPkts, etherHistoryMulticastPkts,
            etherHistoryCRCAlignErrors, etherHistoryUndersizePkts,
            etherHistoryOversizePkts, etherHistoryFragments,
            etherHistoryJabbers, etherHistoryCollisions,
            etherHistoryUtilization
        }
        STATUS current
        DESCRIPTION
            "The RMON Ethernet History Group."
        ::= { rmonGroups 3 }

    rmonAlarmGroup OBJECT-GROUP
        OBJECTS {
            alarmIndex, alarmInterval, alarmVariable,
            alarmSampleType, alarmValue, alarmStartupAlarm,
            alarmRisingThreshold, alarmFallingThreshold,
            alarmRisingEventIndex, alarmFallingEventIndex,
            alarmOwner, alarmStatus
        }
        STATUS current
        DESCRIPTION
            "The RMON Alarm Group."
        ::= { rmonGroups 4 }

    rmonHostGroup OBJECT-GROUP
        OBJECTS {
            hostControlIndex, hostControlDataSource,
            hostControlTableSize, hostControlLastDeleteTime,
            hostControlOwner, hostControlStatus,
            hostAddress, hostCreationOrder, hostIndex,
            hostInPkts, hostOutPkts, hostInOctets,
            hostOutOctets, hostOutErrors, hostOutBroadcastPkts,
            hostOutMulticastPkts, hostTimeAddress,
            hostTimeCreationOrder, hostTimeIndex,
            hostTimeInPkts, hostTimeOutPkts, hostTimeInOctets,
            hostTimeOutOctets, hostTimeOutErrors,
            hostTimeOutBroadcastPkts, hostTimeOutMulticastPkts
        }
        STATUS current
        DESCRIPTION
            "The RMON Host Group."
        ::= { rmonGroups 5 }

    rmonHostTopNGroup OBJECT-GROUP
        OBJECTS {
            hostTopNControlIndex, hostTopNHostIndex,
            hostTopNRateBase, hostTopNTimeRemaining,
            hostTopNDuration, hostTopNRequestedSize,
            hostTopNGrantedSize, hostTopNStartTime,
            hostTopNOwner, hostTopNStatus,
            hostTopNReport, hostTopNIndex,
            hostTopNAddress, hostTopNRate
        }
        STATUS current
        DESCRIPTION
            "The RMON Host Top 'N' Group."
        ::= { rmonGroups 6 }

    rmonMatrixGroup OBJECT-GROUP
        OBJECTS {
            matrixControlIndex, matrixControlDataSource,
            matrixControlTableSize, matrixControlLastDeleteTime,
            matrixControlOwner, matrixControlStatus,
            matrixSDSourceAddress, matrixSDDestAddress,
            matrixSDIndex, matrixSDPkts,
            matrixSDOctets, matrixSDErrors,
            matrixDSSourceAddress, matrixDSDestAddress,
            matrixDSIndex, matrixDSPkts,
            matrixDSOctets, matrixDSErrors
        }
        STATUS current
        DESCRIPTION
            "The RMON Matrix Group."
        ::= { rmonGroups 7 }

    rmonFilterGroup OBJECT-GROUP
        OBJECTS {
            filterIndex, filterChannelIndex, filterPktDataOffset,
            filterPktData, filterPktDataMask,
            filterPktDataNotMask, filterPktStatus,
            filterPktStatusMask, filterPktStatusNotMask,
            filterOwner, filterStatus,
            channelIndex, channelIfIndex, channelAcceptType,
            channelDataControl, channelTurnOnEventIndex,
            channelTurnOffEventIndex, channelEventIndex,
            channelEventStatus, channelMatches,
            channelDescription, channelOwner, channelStatus
        }
        STATUS current
        DESCRIPTION
            "The RMON Filter Group."
        ::= { rmonGroups 8 }

    rmonPacketCaptureGroup OBJECT-GROUP
        OBJECTS {
            bufferControlIndex, bufferControlChannelIndex,
            bufferControlFullStatus, bufferControlFullAction,
            bufferControlCaptureSliceSize,
            bufferControlDownloadSliceSize,
            bufferControlDownloadOffset,
            bufferControlMaxOctetsRequested,
            bufferControlMaxOctetsGranted,
            bufferControlCapturedPackets,
            bufferControlTurnOnTime,
            bufferControlOwner, bufferControlStatus,
            captureBufferControlIndex, captureBufferIndex,
            captureBufferPacketID, captureBufferPacketData,
            captureBufferPacketLength, captureBufferPacketTime,
            captureBufferPacketStatus
        }
        STATUS current
        DESCRIPTION
            "The RMON Packet Capture Group."
        ::= { rmonGroups 9 }

    rmonEventGroup OBJECT-GROUP
        OBJECTS {
            eventIndex, eventDescription, eventType,
            eventCommunity, eventLastTimeSent,
            eventOwner, eventStatus,
            logEventIndex, logIndex, logTime,
            logDescription
        }
        STATUS current
        DESCRIPTION
            "The RMON Event Group."
        ::= { rmonGroups 10 }

    rmonNotificationGroup NOTIFICATION-GROUP
        NOTIFICATIONS { risingAlarm, fallingAlarm }
        STATUS        current
        DESCRIPTION
            "The RMON Notification Group."
        ::= { rmonGroups 11 }
END

-- 
--    Copyright (C) The Internet Society (2000).  All Rights Reserved.
-- 
--    This document and translations of it may be copied and furnished to
--    others, and derivative works that comment on or otherwise explain it
--    or assist in its implementation may be prepared, copied, published
--    and distributed, in whole or in part, without restriction of any
--    kind, provided that the above copyright notice and this paragraph are
--    included on all such copies and derivative works.  However, this
--    document itself may not be modified in any way, such as by removing
--    the copyright notice or references to the Internet Society or other
--    Internet organizations, except as needed for the purpose of
--    developing Internet standards in which case the procedures for
--    copyrights defined in the Internet Standards process must be
--    followed, or as required to translate it into languages other than
--    English.
-- 
--    The limited permissions granted above are perpetual and will not be
--    revoked by the Internet Society or its successors or assigns.
-- 
--    This document and the information contained herein is provided on an
--    "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
--    TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
--    BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
--    HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
--    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
-- 
