"An entry in the table, containing information on the loopback
          status for a single Ethernet-like interface.  Entries in the
          table are automatically created whenever the local OAM entity
          supports loopback capabilities.  The loopback status on the
          interface can be determined from the dot3OamLoopbackStatus
          object.
          "
        INDEX       { ifIndex }
        ::= { dot3OamLoopbackTable 1 }

      Dot3OamLoopbackEntry ::=
        SEQUENCE {
          dot3OamLoopbackStatus             INTEGER,
          dot3OamLoopbackIgnoreRx           INTEGER
        }

      dot3OamLoopbackStatus OBJECT-TYPE
        SYNTAX      INTEGER {
                      -- all values, except where noted, can be read
                      -- but cannot be written
                      noLoopback (1),

                      -- initiatingLoopback can be read or written
                      initiatingLoopback (2),
                      remoteLoopback (3),

                      -- terminatingLoopback can be read or written
                      terminatingLoopback (4),
                      localLoopback (5),
                      unknown (6)
                    }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
          "The loopback status of the OAM entity.  This status is
          determined by a combination of the local parser and
          multiplexer states, the remote parser and multiplexer states,
          as well as by the actions of the local OAM client.  When
          operating in normal mode with no loopback in progress, the
          status reads noLoopback(1).

          The values initiatingLoopback(2) and terminatingLoopback(4)
          can be read or written.  The other values can only be read -
          they can never be written.  Writing initiatingLoopback causes
          the local OAM entity to start the loopback process with its
          peer.  This value can only be written when the status is
          noLoopback(1).  Writing the value initiatingLoopback(2) in any
          other state has no effect.  When in remoteLoopback(3), writing
          terminatingLoopback(4) causes the local OAM entity to initiate
          the termination of the loopback state.  Writing
          terminatingLoopack(4) in any other state has no effect.

          If the OAM client initiates a loopback and has sent a
          Loopback OAMPDU and is waiting for a response, where the local
          parser and multiplexer states are DISCARD (see [802.3ah,
          57.2.11.1]), the status is 'initiatingLoopback'.  In this
          case, the local OAM entity has yet to receive any
          acknowledgment that the remote OAM entity has received its
          loopback command request.
          If the local OAM client knows that the remote OAM entity is in
          loopback mode (via the remote state information as described
          in [802.3ah, 57.2.11.1, 30.3.6.1.15]), the status is
          remoteLoopback(3).  If the local OAM client is in the process
          of terminating the remote loopback [802.3ah, 57.2.11.3,
          30.3.6.1.14] with its local multiplexer and parser states in
          DISCARD, the status is terminatingLoopback(4).  If the remote
          OAM client has put the local OAM entity in loopback mode as
          indicated by its local parser state, the status is
          localLoopback(5).

          The unknown(6) status indicates that the parser and
          multiplexer combination is unexpected.  This status may be
          returned if the OAM loopback is in a transition state but
          should not persist.

          The values of this attribute correspond to the following
          values of the local and remote parser and multiplexer states.

            value            LclPrsr   LclMux    RmtPrsr   RmtMux
            noLoopback         FWD       FWD       FWD       FWD
            initLoopback     DISCARD   DISCARD     FWD       FWD
            rmtLoopback      DISCARD     FWD      LPBK    DISCARD
            tmtngLoopback    DISCARD   DISCARD    LPBK    DISCARD
            lclLoopback        LPBK    DISCARD   DISCARD     FWD
            unknown            ***   any other combination   ***
          "
        REFERENCE   "[802.3ah], REFERENCE 57.2.11, 30.3.61.14,
          30.3.6.1.15"
        ::= { dot3OamLoopbackEntry 1 }

      dot3OamLoopbackIgnoreRx OBJECT-TYPE
        SYNTAX      INTEGER { ignore(1), process(2) }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
          "Since OAM loopback is a disruptive operation (user traffic
          does not pass), this attribute provides a mechanism to provide
          controls over whether received OAM loopback commands are
          processed or ignored.  When the value is ignore(1), received
          loopback commands are ignored.  When the value is process(2),
          OAM loopback commands are processed.  The default value is to
          ignore loopback commands (ignore(1)).
          "
        REFERENCE   "[802.3ah], REFERENCE 57.2.11, 30.3.61.14,
          30.3.6.1.15"
        ::= { dot3OamLoopbackEntry 2 }

      -- ***************************************************************
      --
      -- Ethernet OAM Statistics group
      --

      dot3OamStatsTable OBJECT-TYPE
        SYNTAX      SEQUENCE OF Dot3OamStatsEntry
        MAX-ACCESS  not-accessible
        STATUS      current
        DESCRIPTION
          "This table contains statistics for the OAM function on a
          particular Ethernet-like interface.  There is an entry in the
          table for every entry in the dot3OamTable.

          The counters in this table are defined as 32-bit entries to
          match the counter size as defined in [802.3ah].  Given that
          the OA protocol is a slow protocol, the counters increment at
          a slow rate.
          "
        ::= { dot3OamObjects 4 }

      dot3OamStatsEntry OBJECT-TYPE
        SYNTAX      Dot3OamStatsEntry
        MAX-ACCESS  not-accessible
        STATUS      current
        DESCRIPTION
          "An entry in the table containing statistics information on
          the Ethernet OAM function for a single Ethernet-like
          interface.  Entries are automatically created for every entry
          in the dot3OamTable.  Counters are maintained across
          transitions in dot3OamOperStatus.
          "
        INDEX       { ifIndex }
        ::= { dot3OamStatsTable 1 }

      Dot3OamStatsEntry ::=
        SEQUENCE {
                  dot3OamInformationTx                Counter32,
                  dot3OamInformationRx                Counter32,
                  dot3OamUniqueEventNotificationTx    Counter32,
                  dot3OamUniqueEventNotificationRx    Counter32,
                  dot3OamDuplicateEventNotificationTx Counter32,
                  dot3OamDuplicateEventNotificationRx Counter32,
                  dot3OamLoopbackControlTx            Counter32,
                  dot3OamLoopbackControlRx            Counter32,
                  dot3OamVariableRequestTx            Counter32,
                  dot3OamVariableRequestRx            Counter32,
                  dot3OamVariableResponseTx           Counter32,
                  dot3OamVariableResponseRx           Counter32,
                  dot3OamOrgSpecificTx                Counter32,
                  dot3OamOrgSpecificRx                Counter32,
                  dot3OamUnsupportedCodesTx           Counter32,
                  dot3OamUnsupportedCodesRx           Counter32,
                  dot3OamFramesLostDueToOam           Counter32
                 }

      dot3OamInformationTx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of Information OAMPDUs transmitted on
          this interface.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.  "
        REFERENCE   "[802.3ah], 30.3.6.1.20."
        ::= { dot3OamStatsEntry 1 }

      dot3OamInformationRx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of Information OAMPDUs received on this
          interface.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.
          "
        REFERENCE   "[802.3ah], 30.3.6.1.21."
        ::= { dot3OamStatsEntry 2 }

      dot3OamUniqueEventNotificationTx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of unique Event OAMPDUs transmitted on
          this interface.  Event Notifications may be sent in duplicate
          to increase the probability of successfully being received,
          given the possibility that a frame may be lost in transit.
          Duplicate Event Notification transmissions are counted by
          dot3OamDuplicateEventNotificationTx.

          A unique Event Notification OAMPDU is indicated as an Event
          Notification OAMPDU with a Sequence Number field that is
          distinct from the previously transmitted Event Notification
          OAMPDU Sequence Number.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.
          "
        REFERENCE   "[802.3ah], 30.3.6.1.22."
        ::= { dot3OamStatsEntry 3 }

      dot3OamUniqueEventNotificationRx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of unique Event OAMPDUs received on
          this interface.  Event Notification OAMPDUs may be sent in
          duplicate to increase the probability of successfully being
          received, given the possibility that a frame may be lost in
          transit.  Duplicate Event Notification receptions are counted
          by dot3OamDuplicateEventNotificationRx.

          A unique Event Notification OAMPDU is indicated as an Event
          Notification OAMPDU with a Sequence Number field that is
          distinct from the previously received Event Notification
          OAMPDU Sequence Number.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.
          "
        REFERENCE   "[802.3ah], 30.3.6.1.24."
        ::= { dot3OamStatsEntry 4 }

      dot3OamDuplicateEventNotificationTx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of duplicate Event OAMPDUs transmitted
          on this interface.  Event Notification OAMPDUs may be sent in
          duplicate to increase the probability of successfully being
          received, given the possibility that a frame may be lost in
          transit.

          A duplicate Event Notification OAMPDU is indicated as an Event
          Notification OAMPDU with a Sequence Number field that is
          identical to the previously transmitted Event Notification
          OAMPDU Sequence Number.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.
          "
        REFERENCE   "[802.3ah], 30.3.6.1.23."
        ::= { dot3OamStatsEntry 5 }

      dot3OamDuplicateEventNotificationRx OBJECT-TYPE
        SYNTAX      Counter32
        UNITS       "frames"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
          "A count of the number of duplicate Event OAMPDUs received on
          this interface.  Event Notification OAMPDUs may be sent in
          duplicate to increase the probability of successfully being
          received, given the possibility that a frame may be lost in
          transit.

          A duplicate Event Notification OAMPDU is indicated as an Event
          Notification OAMPDU with a Sequence Number field that is
          identical to the previously received Event Notification OAMPDU
          Sequence Number.

          Discontinuities of this counter can occur at re-initialization
          of the management system, and at other times as indicated by
          the value of the ifCounterDiscontinuityTime.
          "
        REFERENCE   "[802.3ah], 30.3.6.1.25."
        ::= { dot3OamStatsEntry 6 }