/*							-- DO NOT EDIT --

 * Generated by smidump version 0.4.8:

 *   smidump -f corba IF-MIB

 *

 * Derived from IF-MIB:

 *   The MIB module to describe generic objects for network

 *   interface sub-layers.  This MIB is an updated version of

 *   MIB-II's ifTable, and incorporates the extensions defined in

 *   RFC 1229.

 *

 * Revision 2000-06-14 00:00:

 *   Clarifications agreed upon by the Interfaces MIB WG, and

 *   published as RFC 2863.

 *

 * Revision 1996-02-28 21:55:

 *   Revisions made by the Interfaces MIB WG, and published in

 *   RFC 2233.

 *

 * Revision 1993-11-08 21:55:

 *   Initial revision, published as part of RFC 1573.

 *

 * $Id: IF_MIB.idl 8090 2008-04-18 12:56:29Z strauss $

 */

#ifndef _IF_MIB_IDL_

#define _IF_MIB_IDL_

#include <ASN1Types.idl>

#include <SNMPMgmt.idl>

#include <IANAifType_MIB.idl>

#include <SNMPv2_SMI.idl>

#include <SNMPv2_TC.idl>

module IF_MIB {

    typedef IANAifType_MIB::IANAifTypeType IANAifTypeType;

    typedef SNMPv2_SMI::Counter32Type Counter32Type;

    typedef SNMPv2_SMI::Counter64Type Counter64Type;

    typedef SNMPv2_SMI::Gauge32Type Gauge32Type;

    typedef SNMPv2_SMI::Integer32Type Integer32Type;

    typedef SNMPv2_SMI::TimeTicksType TimeTicksType;

    typedef SNMPv2_TC::AutonomousTypeType AutonomousTypeType;

    typedef SNMPv2_TC::DisplayStringType DisplayStringType;

    typedef SNMPv2_TC::PhysAddressType PhysAddressType;

    typedef SNMPv2_TC::RowStatusType RowStatusType;

    typedef SNMPv2_TC::TestAndIncrType TestAndIncrType;

    typedef SNMPv2_TC::TimeStampType TimeStampType;

    typedef SNMPv2_TC::TruthValueType TruthValueType;

    const string moduleIdentity = "ifMIB";

    const ASN1_ObjectIdentifier ifMIB = "::IF_MIB::ifMIB";

    /*

             The MIB module to describe generic objects for network

             interface sub-layers.  This MIB is an updated version of

             MIB-II's ifTable, and incorporates the extensions defined in

             RFC 1229.

    LAST-UPDATED:   200006140000Z

    ORGANIZATION:

            "IETF Interfaces MIB Working Group"

    CONTACT-INFO:

            "   Keith McCloghrie

             Cisco Systems, Inc.

             170 West Tasman Drive

             San Jose, CA  95134-1706

             US

             408-526-5260

             kzm@cisco.com"

    REVISION:       "200006140000Z"

    REVISION-DESCRIPTION:

            "Clarifications agreed upon by the Interfaces MIB WG, and

             published as RFC 2863."

    REVISION:       "199602282155Z"

    REVISION-DESCRIPTION:

            "Revisions made by the Interfaces MIB WG, and published in

             RFC 2233."

    REVISION:       "199311082155Z"

    REVISION-DESCRIPTION:

            "Initial revision, published as part of RFC 1573."

    */

    /*

             A unique value, greater than zero, for each interface or

             interface sub-layer in the managed system.  It is

             recommended that values are assigned contiguously starting

             from 1.  The value for each interface sub-layer must remain

             constant at least from one re-initialization of the entity's

             network management system to the next re-initialization.

    DISPLAY-HINT: d

    */

    typedef ASN1_Integer InterfaceIndexType; 

    /*

             This textual convention is an extension of the

             InterfaceIndex convention.  The latter defines a greater

             than zero value used to identify an interface or interface

             sub-layer in the managed system.  This extension permits the

             additional value of zero.  the value zero is object-specific

             and must therefore be defined as part of the description of

             any object which uses this syntax.  Examples of the usage of

             zero might include situations where interface was unknown,

             or when none or all interfaces need to be referenced.

    DISPLAY-HINT: d

    */

    typedef ASN1_Integer InterfaceIndexOrZeroType; 

    typedef ASN1_OctetString IfDescrType; 

    typedef ASN1_Integer IfAdminStatusType; 

    const IfAdminStatusType IfAdminStatusType_up = 1;

    const IfAdminStatusType IfAdminStatusType_down = 2;

    const IfAdminStatusType IfAdminStatusType_testing = 3;

    const string IfAdminStatusType_NameNumberList = "up (1) , down (2) , testing (3)";

    typedef ASN1_Integer IfOperStatusType; 

    const IfOperStatusType IfOperStatusType_up = 1;

    const IfOperStatusType IfOperStatusType_down = 2;

    const IfOperStatusType IfOperStatusType_testing = 3;

    const IfOperStatusType IfOperStatusType_unknown = 4;

    const IfOperStatusType IfOperStatusType_dormant = 5;

    const IfOperStatusType IfOperStatusType_notPresent = 6;

    const IfOperStatusType IfOperStatusType_lowerLayerDown = 7;

    const string IfOperStatusType_NameNumberList = "up (1) , down (2) , testing (3) , unknown (4) , dormant (5) , notPresent (6) , lowerLayerDown (7)";

    typedef ASN1_Integer IfLinkUpDownTrapEnableType; 

    const IfLinkUpDownTrapEnableType IfLinkUpDownTrapEnableType_enabled = 1;

    const IfLinkUpDownTrapEnableType IfLinkUpDownTrapEnableType_disabled = 2;

    const string IfLinkUpDownTrapEnableType_NameNumberList = "enabled (1) , disabled (2)";

    typedef ASN1_OctetString IfAliasType; 

    typedef ASN1_Integer IfRcvAddressTypeType; 

    const IfRcvAddressTypeType IfRcvAddressTypeType_other = 1;

    const IfRcvAddressTypeType IfRcvAddressTypeType_volatile = 2;

    const IfRcvAddressTypeType IfRcvAddressTypeType_nonVolatile = 3;

    const string IfRcvAddressTypeType_NameNumberList = "other (1) , volatile (2) , nonVolatile (3)";

    interface interfaces : SNMPMgmt::SmiEntry {

        /*

             The number of network interfaces (regardless of their

             current state) present on this system.

        */

        readonly attribute ASN1_Integer ifNumber;

        /*

             A list of interface entries.  The number of entries is

             given by the value of ifNumber.

        */

        SNMPMgmt::SmiTableIterator get_ifTable();

    };

    /*

             An entry containing management information applicable to a

             particular interface.

    */

    interface ifEntry : SNMPMgmt::SmiEntry {

        const string IndexVarList = "ifIndex";

        /*

             A unique value, greater than zero, for each interface.  It

             is recommended that values are assigned contiguously

             starting from 1.  The value for each interface sub-layer

             must remain constant at least from one re-initialization of

             the entity's network management system to the next re-

             initialization.

        */

        readonly attribute InterfaceIndexType ifIndex;

        /*

             A textual string containing information about the

             interface.  This string should include the name of the

             manufacturer, the product name and the version of the

             interface hardware/software.

        */

        readonly attribute IfDescrType ifDescr;

        /*

             The type of interface.  Additional values for ifType are

             assigned by the Internet Assigned Numbers Authority (IANA),

             through updating the syntax of the IANAifType textual

             convention.

        */

        readonly attribute IANAifTypeType ifType;

        /*

             The size of the largest packet which can be sent/received

             on the interface, specified in octets.  For interfaces that

             are used for transmitting network datagrams, this is the

             size of the largest network datagram that can be sent on the

             interface.

        */

        readonly attribute ASN1_Integer ifMtu;

        /*

             An estimate of the interface's current bandwidth in bits

             per second.  For interfaces which do not vary in bandwidth

             or for those where no accurate estimation can be made, this

             object should contain the nominal bandwidth.  If the

             bandwidth of the interface is greater than the maximum value

             reportable by this object then this object should report its

             maximum value (4,294,967,295) and ifHighSpeed must be used

             to report the interace's speed.  For a sub-layer which has

             no concept of bandwidth, this object should be zero.

        */

        readonly attribute Gauge32Type ifSpeed;

        /*

             The interface's address at its protocol sub-layer.  For

             example, for an 802.x interface, this object normally

             contains a MAC address.  The interface's media-specific MIB

             must define the bit and byte ordering and the format of the

             value of this object.  For interfaces which do not have such

             an address (e.g., a serial line), this object should contain

             an octet string of zero length.

        */

        readonly attribute PhysAddressType ifPhysAddress;

        /*

             The desired state of the interface.  The testing(3) state

             indicates that no operational packets can be passed.  When a

             managed system initializes, all interfaces start with

             ifAdminStatus in the down(2) state.  As a result of either

             explicit management action or per configuration information

             retained by the managed system, ifAdminStatus is then

             changed to either the up(1) or testing(3) states (or remains

             in the down(2) state).

        */

        attribute IfAdminStatusType ifAdminStatus;

        /*

             The current operational state of the interface.  The

             testing(3) state indicates that no operational packets can

             be passed.  If ifAdminStatus is down(2) then ifOperStatus

             should be down(2).  If ifAdminStatus is changed to up(1)

             then ifOperStatus should change to up(1) if the interface is

             ready to transmit and receive network traffic; it should

             change to dormant(5) if the interface is waiting for

             external actions (such as a serial line waiting for an

             incoming connection); it should remain in the down(2) state

             if and only if there is a fault that prevents it from going

             to the up(1) state; it should remain in the notPresent(6)

             state if the interface has missing (typically, hardware)

             components.

        */

        readonly attribute IfOperStatusType ifOperStatus;

        /*

             The value of sysUpTime at the time the interface entered

             its current operational state.  If the current state was

             entered prior to the last re-initialization of the local

             network management subsystem, then this object contains a

             zero value.

        */

        readonly attribute TimeTicksType ifLastChange;

        /*

             The total number of octets received on the interface,

             including framing characters.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInOctets;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were not addressed to a multicast

             or broadcast address at this sub-layer.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInUcastPkts;

        /*

             The number of inbound packets which were chosen to be

             discarded even though no errors had been detected to prevent

             their being deliverable to a higher-layer protocol.  One

             possible reason for discarding such a packet could be to

             free up buffer space.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInDiscards;

        /*

             For packet-oriented interfaces, the number of inbound

             packets that contained errors preventing them from being

             deliverable to a higher-layer protocol.  For character-

             oriented or fixed-length interfaces, the number of inbound

             transmission units that contained errors preventing them

             from being deliverable to a higher-layer protocol.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInErrors;

        /*

             For packet-oriented interfaces, the number of packets

             received via the interface which were discarded because of

             an unknown or unsupported protocol.  For character-oriented

             or fixed-length interfaces that support protocol

             multiplexing the number of transmission units received via

             the interface which were discarded because of an unknown or

             unsupported protocol.  For any interface that does not

             support protocol multiplexing, this counter will always be

             0.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInUnknownProtos;

        /*

             The total number of octets transmitted out of the

             interface, including framing characters.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutOctets;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were not addressed to a

             multicast or broadcast address at this sub-layer, including

             those that were discarded or not sent.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutUcastPkts;

        /*

             The number of outbound packets which were chosen to be

             discarded even though no errors had been detected to prevent

             their being transmitted.  One possible reason for discarding

             such a packet could be to free up buffer space.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutDiscards;

        /*

             For packet-oriented interfaces, the number of outbound

             packets that could not be transmitted because of errors.

             For character-oriented or fixed-length interfaces, the

             number of outbound transmission units that could not be

             transmitted because of errors.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutErrors;

    };

    interface ifMIBObjects : SNMPMgmt::SmiEntry {

        /*

             A list of interface entries.  The number of entries is

             given by the value of ifNumber.  This table contains

             additional objects for the interface table.

        */

        SNMPMgmt::SmiTableIterator get_ifXTable();

        /*

             The table containing information on the relationships

             between the multiple sub-layers of network interfaces.  In

             particular, it contains information on which sub-layers run

             'on top of' which other sub-layers, where each sub-layer

             corresponds to a conceptual row in the ifTable.  For

             example, when the sub-layer with ifIndex value x runs over

             the sub-layer with ifIndex value y, then this table

             contains:

               ifStackStatus.x.y=active

             For each ifIndex value, I, which identifies an active

             interface, there are always at least two instantiated rows

             in this table associated with I.  For one of these rows, I

             is the value of ifStackHigherLayer; for the other, I is the

             value of ifStackLowerLayer.  (If I is not involved in

             multiplexing, then these are the only two rows associated

             with I.)

             For example, two rows exist even for an interface which has

             no others stacked on top or below it:

               ifStackStatus.0.x=active

               ifStackStatus.x.0=active 

        */

        SNMPMgmt::SmiTableIterator get_ifStackTable();

        /*

             This table contains an entry for each address (broadcast,

             multicast, or uni-cast) for which the system will receive

             packets/frames on a particular interface, except as follows:

             - for an interface operating in promiscuous mode, entries

             are only required for those addresses for which the system

             would receive frames were it not operating in promiscuous

             mode.

             - for 802.5 functional addresses, only one entry is

             required, for the address which has the functional address

             bit ANDed with the bit mask of all functional addresses for

             which the interface will accept frames.

             A system is normally able to use any unicast address which

             corresponds to an entry in this table as a source address.

        */

        SNMPMgmt::SmiTableIterator get_ifRcvAddressTable();

        /*

             The value of sysUpTime at the time of the last creation or

             deletion of an entry in the ifTable.  If the number of

             entries has been unchanged since the last re-initialization

             of the local network management subsystem, then this object

             contains a zero value.

        */

        readonly attribute TimeTicksType ifTableLastChange;

        /*

             The value of sysUpTime at the time of the last change of

             the (whole) interface stack.  A change of the interface

             stack is defined to be any creation, deletion, or change in

             value of any instance of ifStackStatus.  If the interface

             stack has been unchanged since the last re-initialization of

             the local network management subsystem, then this object

             contains a zero value.

        */

        readonly attribute TimeTicksType ifStackLastChange;

    };

    /*

             An entry containing additional management information

             applicable to a particular interface.

    */

    interface ifXEntry : IF_MIB::ifEntry {

        /*

             The textual name of the interface.  The value of this

             object should be the name of the interface as assigned by

             the local device and should be suitable for use in commands

             entered at the device's `console'.  This might be a text

             name, such as `le0' or a simple port number, such as `1',

             depending on the interface naming syntax of the device.  If

             several entries in the ifTable together represent a single

             interface as named by the device, then each will have the

             same value of ifName.  Note that for an agent which responds

             to SNMP queries concerning an interface on some other

             (proxied) device, then the value of ifName for such an

             interface is the proxied device's local name for it.

             If there is no local name, or this object is otherwise not

             applicable, then this object contains a zero-length string.

        */

        readonly attribute DisplayStringType ifName;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were addressed to a multicast

             address at this sub-layer.  For a MAC layer protocol, this

             includes both Group and Functional addresses.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInMulticastPkts;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were addressed to a broadcast

             address at this sub-layer.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifInBroadcastPkts;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were addressed to a

             multicast address at this sub-layer, including those that

             were discarded or not sent.  For a MAC layer protocol, this

             includes both Group and Functional addresses.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutMulticastPkts;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were addressed to a

             broadcast address at this sub-layer, including those that

             were discarded or not sent.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter32Type ifOutBroadcastPkts;

        /*

             The total number of octets received on the interface,

             including framing characters.  This object is a 64-bit

             version of ifInOctets.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCInOctets;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were not addressed to a multicast

             or broadcast address at this sub-layer.  This object is a

             64-bit version of ifInUcastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCInUcastPkts;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were addressed to a multicast

             address at this sub-layer.  For a MAC layer protocol, this

             includes both Group and Functional addresses.  This object

             is a 64-bit version of ifInMulticastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCInMulticastPkts;

        /*

             The number of packets, delivered by this sub-layer to a

             higher (sub-)layer, which were addressed to a broadcast

             address at this sub-layer.  This object is a 64-bit version

             of ifInBroadcastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCInBroadcastPkts;

        /*

             The total number of octets transmitted out of the

             interface, including framing characters.  This object is a

             64-bit version of ifOutOctets.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCOutOctets;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were not addressed to a

             multicast or broadcast address at this sub-layer, including

             those that were discarded or not sent.  This object is a

             64-bit version of ifOutUcastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCOutUcastPkts;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were addressed to a

             multicast address at this sub-layer, including those that

             were discarded or not sent.  For a MAC layer protocol, this

             includes both Group and Functional addresses.  This object

             is a 64-bit version of ifOutMulticastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCOutMulticastPkts;

        /*

             The total number of packets that higher-level protocols

             requested be transmitted, and which were addressed to a

             broadcast address at this sub-layer, including those that

             were discarded or not sent.  This object is a 64-bit version

             of ifOutBroadcastPkts.

             Discontinuities in the value of this counter can occur at

             re-initialization of the management system, and at other

             times as indicated by the value of

             ifCounterDiscontinuityTime.

        */

        readonly attribute Counter64Type ifHCOutBroadcastPkts;

        /*

             Indicates whether linkUp/linkDown traps should be generated

             for this interface.

             By default, this object should have the value enabled(1) for

             interfaces which do not operate on 'top' of any other

             interface (as defined in the ifStackTable), and disabled(2)

             otherwise.

        */

        attribute IfLinkUpDownTrapEnableType ifLinkUpDownTrapEnable;

        /*

             An estimate of the interface's current bandwidth in units

             of 1,000,000 bits per second.  If this object reports a

             value of `n' then the speed of the interface is somewhere in

             the range of `n-500,000' to `n+499,999'.  For interfaces

             which do not vary in bandwidth or for those where no

             accurate estimation can be made, this object should contain

             the nominal bandwidth.  For a sub-layer which has no concept

             of bandwidth, this object should be zero.

        */

        readonly attribute Gauge32Type ifHighSpeed;

        /*

             This object has a value of false(2) if this interface only

             accepts packets/frames that are addressed to this station.

             This object has a value of true(1) when the station accepts

             all packets/frames transmitted on the media.  The value

             true(1) is only legal on certain types of media.  If legal,

             setting this object to a value of true(1) may require the

             interface to be reset before becoming effective.

             The value of ifPromiscuousMode does not affect the reception

             of broadcast and multicast packets/frames by the interface.

        */

        attribute TruthValueType ifPromiscuousMode;

        /*

             This object has the value 'true(1)' if the interface

             sublayer has a physical connector and the value 'false(2)'

             otherwise.

        */

        readonly attribute TruthValueType ifConnectorPresent;

        /*

             This object is an 'alias' name for the interface as

             specified by a network manager, and provides a non-volatile

             'handle' for the interface.

             On the first instantiation of an interface, the value of

             ifAlias associated with that interface is the zero-length

             string.  As and when a value is written into an instance of

             ifAlias through a network management set operation, then the

             agent must retain the supplied value in the ifAlias instance

             associated with the same interface for as long as that

             interface remains instantiated, including across all re-

             initializations/reboots of the network management system,

             including those which result in a change of the interface's

             ifIndex value.

             An example of the value which a network manager might store

             in this object for a WAN interface is the (Telco's) circuit

             number/identifier of the interface.

             Some agents may support write-access only for interfaces

             having particular values of ifType.  An agent which supports

             write access to this object is required to keep the value in

             non-volatile storage, but it may limit the length of new

             values depending on how much storage is already occupied by

             the current values for other interfaces.

        */

        attribute IfAliasType ifAlias;

        /*

             The value of sysUpTime on the most recent occasion at which

             any one or more of this interface's counters suffered a

             discontinuity.  The relevant counters are the specific

             instances associated with this interface of any Counter32 or

             Counter64 object contained in the ifTable or ifXTable.  If

             no such discontinuities have occurred since the last re-

             initialization of the local management subsystem, then this

             object contains a zero value.

        */

        readonly attribute TimeStampType ifCounterDiscontinuityTime;

    };

    /*

             Information on a particular relationship between two sub-

             layers, specifying that one sub-layer runs on 'top' of the

             other sub-layer.  Each sub-layer corresponds to a conceptual

             row in the ifTable.

    */

    interface ifStackEntry : SNMPMgmt::SmiEntry {

        const string IndexVarList = "ifStackHigherLayer ifStackLowerLayer";

        /*

             The status of the relationship between two sub-layers.

             Changing the value of this object from 'active' to

             'notInService' or 'destroy' will likely have consequences up

             and down the interface stack.  Thus, write access to this

             object is likely to be inappropriate for some types of

             interfaces, and many implementations will choose not to

             support write-access for any type of interface.

        */

        attribute RowStatusType ifStackStatus;

    };

    /*

             A list of objects identifying an address for which the

             system will accept packets/frames on the particular

             interface identified by the index value ifIndex.

    */

    interface ifRcvAddressEntry : SNMPMgmt::SmiEntry {

        const string IndexVarList = "ifIndex ifRcvAddressAddress";

        /*

             This object is used to create and delete rows in the

             ifRcvAddressTable.

        */

        attribute RowStatusType ifRcvAddressStatus;

        /*

             This object has the value nonVolatile(3) for those entries

             in the table which are valid and will not be deleted by the

             next restart of the managed system.  Entries having the

             value volatile(2) are valid and exist, but have not been

             saved, so that will not exist after the next restart of the

             managed system.  Entries having the value other(1) are valid

             and exist but are not classified as to whether they will

             continue to exist after the next restart.

        */

        attribute IfRcvAddressTypeType ifRcvAddressType;

    };

    struct IfIndexVBType {

        string var_name;

        string var_index;

        InterfaceIndexType ifIndex;

    };

    struct IfAdminStatusVBType {

        string var_name;

        string var_index;

        IfAdminStatusType ifAdminStatus;

    };

    struct IfOperStatusVBType {

        string var_name;

        string var_index;

        IfOperStatusType ifOperStatus;

    };

    struct LinkDownType {

        IfIndexVBType ifIndex;

        IfAdminStatusVBType ifAdminStatus;

        IfOperStatusVBType ifOperStatus;

    };

    struct LinkUpType {

        IfIndexVBType ifIndex;

        IfAdminStatusVBType ifAdminStatus;

        IfOperStatusVBType ifOperStatus;

    };

    /* typed push event communication */

    interface Notifications : SNMPMgmt::Notifications {

        /*

             A linkDown trap signifies that the SNMP entity, acting in

             an agent role, has detected that the ifOperStatus object for

             one of its communication links is about to enter the down

             state from some other state (but not from the notPresent

             state).  This other state is indicated by the included value

             of ifOperStatus.

        */

        void linkDown (

            in CosNaming::Name src_entry_name,

            in CORBA::ScopedName event_type,

            in ASN1_GeneralizedTime event_time,

            in LinkDownType notification_info

        );

        /*

             A linkUp trap signifies that the SNMP entity, acting in an

             agent role, has detected that the ifOperStatus object for

             one of its communication links left the down state and

             transitioned into some other state (but not into the

             notPresent state).  This other state is indicated by the

             included value of ifOperStatus.

        */

        void linkUp (

            in CosNaming::Name src_entry_name,

            in CORBA::ScopedName event_type,

            in ASN1_GeneralizedTime event_time,

            in LinkUpType notification_info

        );

    };

    /* typed pull event communication */

    interface PullNotifications : SNMPMgmt::PullNotifications {

        /*

             A linkDown trap signifies that the SNMP entity, acting in

             an agent role, has detected that the ifOperStatus object for

             one of its communication links is about to enter the down

             state from some other state (but not from the notPresent

             state).  This other state is indicated by the included value

             of ifOperStatus.