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RFC 8343

A YANG Data Model for Interface Management

Pages: 49
Proposed Standard
Obsoletes:  7223
Part 2 of 3 – Pages 10 to 34
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Top   ToC   RFC8343 - Page 10   prevText

5. Interfaces YANG Module

This YANG module imports typedefs from [RFC6991]. <CODE BEGINS> file "ietf-interfaces@2018-02-20.yang" module ietf-interfaces { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-interfaces"; prefix if; import ietf-yang-types { prefix yang; }
Top   ToC   RFC8343 - Page 11
     organization
       "IETF NETMOD (Network Modeling) Working Group";

     contact
       "WG Web:   <https://datatracker.ietf.org/wg/netmod/>
        WG List:  <mailto:netmod@ietf.org>

        Editor:   Martin Bjorklund
                  <mailto:mbj@tail-f.com>";

     description
       "This module contains a collection of YANG definitions for
        managing network interfaces.

        Copyright (c) 2018 IETF Trust and the persons identified as
        authors of the code.  All rights reserved.

        Redistribution and use in source and binary forms, with or
        without modification, is permitted pursuant to, and subject
        to the license terms contained in, the Simplified BSD License
        set forth in Section 4.c of the IETF Trust's Legal Provisions
        Relating to IETF Documents
        (https://trustee.ietf.org/license-info).

        This version of this YANG module is part of RFC 8343; see
        the RFC itself for full legal notices.";

     revision 2018-02-20 {
       description
         "Updated to support NMDA.";
       reference
         "RFC 8343: A YANG Data Model for Interface Management";
     }

     revision 2014-05-08 {
       description
         "Initial revision.";
       reference
         "RFC 7223: A YANG Data Model for Interface Management";
     }

     /*
      * Typedefs
      */

     typedef interface-ref {
       type leafref {
         path "/if:interfaces/if:interface/if:name";
Top   ToC   RFC8343 - Page 12
       }
       description
         "This type is used by data models that need to reference
          interfaces.";
     }

     /*
      * Identities
      */

     identity interface-type {
       description
         "Base identity from which specific interface types are
          derived.";
     }

     /*
      * Features
      */

     feature arbitrary-names {
       description
         "This feature indicates that the device allows user-controlled
          interfaces to be named arbitrarily.";
     }
     feature pre-provisioning {
       description
         "This feature indicates that the device supports
          pre-provisioning of interface configuration, i.e., it is
          possible to configure an interface whose physical interface
          hardware is not present on the device.";
     }
     feature if-mib {
       description
         "This feature indicates that the device implements
          the IF-MIB.";
       reference
         "RFC 2863: The Interfaces Group MIB";
     }

     /*
      * Data nodes
      */

     container interfaces {
       description
         "Interface parameters.";
Top   ToC   RFC8343 - Page 13
       list interface {
         key "name";

         description
           "The list of interfaces on the device.

            The status of an interface is available in this list in the
            operational state.  If the configuration of a
            system-controlled interface cannot be used by the system
            (e.g., the interface hardware present does not match the
            interface type), then the configuration is not applied to
            the system-controlled interface shown in the operational
            state.  If the configuration of a user-controlled interface
            cannot be used by the system, the configured interface is
            not instantiated in the operational state.

            System-controlled interfaces created by the system are
            always present in this list in the operational state,
            whether or not they are configured.";

        leaf name {
           type string;
           description
             "The name of the interface.

              A device MAY restrict the allowed values for this leaf,
              possibly depending on the type of the interface.
              For system-controlled interfaces, this leaf is the
              device-specific name of the interface.

              If a client tries to create configuration for a
              system-controlled interface that is not present in the
              operational state, the server MAY reject the request if
              the implementation does not support pre-provisioning of
              interfaces or if the name refers to an interface that can
              never exist in the system.  A Network Configuration
              Protocol (NETCONF) server MUST reply with an rpc-error
              with the error-tag 'invalid-value' in this case.

              If the device supports pre-provisioning of interface
              configuration, the 'pre-provisioning' feature is
              advertised.

              If the device allows arbitrarily named user-controlled
              interfaces, the 'arbitrary-names' feature is advertised.
Top   ToC   RFC8343 - Page 14
              When a configured user-controlled interface is created by
              the system, it is instantiated with the same name in the
              operational state.

              A server implementation MAY map this leaf to the ifName
              MIB object.  Such an implementation needs to use some
              mechanism to handle the differences in size and characters
              allowed between this leaf and ifName.  The definition of
              such a mechanism is outside the scope of this document.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifName";
         }

         leaf description {
           type string;
           description
             "A textual description of the interface.

              A server implementation MAY map this leaf to the ifAlias
              MIB object.  Such an implementation needs to use some
              mechanism to handle the differences in size and characters
              allowed between this leaf and ifAlias.  The definition of
              such a mechanism is outside the scope of this document.

              Since ifAlias is defined to be stored in non-volatile
              storage, the MIB implementation MUST map ifAlias to the
              value of 'description' in the persistently stored
              configuration.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifAlias";
         }

         leaf type {
           type identityref {
             base interface-type;
           }
           mandatory true;
           description
             "The type of the interface.

              When an interface entry is created, a server MAY
              initialize the type leaf with a valid value, e.g., if it
              is possible to derive the type from the name of the
              interface.

              If a client tries to set the type of an interface to a
              value that can never be used by the system, e.g., if the
              type is not supported or if the type does not match the
Top   ToC   RFC8343 - Page 15
              name of the interface, the server MUST reject the request.
              A NETCONF server MUST reply with an rpc-error with the
              error-tag 'invalid-value' in this case.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifType";
         }

         leaf enabled {
           type boolean;
           default "true";
           description
             "This leaf contains the configured, desired state of the
              interface.

              Systems that implement the IF-MIB use the value of this
              leaf in the intended configuration to set
              IF-MIB.ifAdminStatus to 'up' or 'down' after an ifEntry
              has been initialized, as described in RFC 2863.

              Changes in this leaf in the intended configuration are
              reflected in ifAdminStatus.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifAdminStatus";
         }

         leaf link-up-down-trap-enable {
           if-feature if-mib;
           type enumeration {
             enum enabled {
               value 1;
               description
                 "The device will generate linkUp/linkDown SNMP
                  notifications for this interface.";
             }
             enum disabled {
               value 2;
               description
                 "The device will not generate linkUp/linkDown SNMP
                  notifications for this interface.";
             }
           }
           description
             "Controls whether linkUp/linkDown SNMP notifications
              should be generated for this interface.
Top   ToC   RFC8343 - Page 16
              If this node is not configured, the value 'enabled' is
              operationally used by the server for interfaces that do
              not operate on top of any other interface (i.e., there are
              no 'lower-layer-if' entries), and 'disabled' otherwise.";
           reference
             "RFC 2863: The Interfaces Group MIB -
                        ifLinkUpDownTrapEnable";
         }

         leaf admin-status {
           if-feature if-mib;
           type enumeration {
             enum up {
               value 1;
               description
                 "Ready to pass packets.";
             }
             enum down {
               value 2;
               description
                 "Not ready to pass packets and not in some test mode.";
             }
             enum testing {
               value 3;
               description
                 "In some test mode.";
             }
           }
           config false;
           mandatory true;
           description
             "The desired state of the interface.

              This leaf has the same read semantics as ifAdminStatus.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifAdminStatus";
         }

         leaf oper-status {
           type enumeration {
             enum up {
               value 1;
               description
                 "Ready to pass packets.";
             }
             enum down {
               value 2;
Top   ToC   RFC8343 - Page 17
               description
                 "The interface does not pass any packets.";
             }
             enum testing {
               value 3;
               description
                 "In some test mode.  No operational packets can
                  be passed.";
             }
             enum unknown {
               value 4;
               description
                 "Status cannot be determined for some reason.";
             }
             enum dormant {
               value 5;
               description
                 "Waiting for some external event.";
             }
             enum not-present {
               value 6;
               description
                 "Some component (typically hardware) is missing.";
             }
             enum lower-layer-down {
               value 7;
               description
                 "Down due to state of lower-layer interface(s).";
             }
           }
           config false;
           mandatory true;
           description
             "The current operational state of the interface.

              This leaf has the same semantics as ifOperStatus.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifOperStatus";
         }

         leaf last-change {
           type yang:date-and-time;
           config false;
           description
             "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 node is not present.";
Top   ToC   RFC8343 - Page 18
           reference
             "RFC 2863: The Interfaces Group MIB - ifLastChange";
         }

         leaf if-index {
           if-feature if-mib;
           type int32 {
             range "1..2147483647";
           }
           config false;
           mandatory true;
           description
             "The ifIndex value for the ifEntry represented by this
              interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifIndex";
         }

         leaf phys-address {
           type yang:phys-address;
           config false;
           description
             "The interface's address at its protocol sub-layer.  For
              example, for an 802.x interface, this object normally
              contains a Media Access Control (MAC) address.  The
              interface's media-specific modules must define the bit
              and byte ordering and the format of the value of this
              object.  For interfaces that do not have such an address
              (e.g., a serial line), this node is not present.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifPhysAddress";
         }

         leaf-list higher-layer-if {
           type interface-ref;
           config false;
           description
             "A list of references to interfaces layered on top of this
              interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifStackTable";
         }

         leaf-list lower-layer-if {
           type interface-ref;
           config false;
Top   ToC   RFC8343 - Page 19
           description
             "A list of references to interfaces layered underneath this
              interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifStackTable";
         }

         leaf speed {
           type yang:gauge64;
           units "bits/second";
           config false;
           description
               "An estimate of the interface's current bandwidth in bits
                per second.  For interfaces that do not vary in
                bandwidth or for those where no accurate estimation can
                be made, this node should contain the nominal bandwidth.
                For interfaces that have no concept of bandwidth, this
                node is not present.";
           reference
             "RFC 2863: The Interfaces Group MIB -
                        ifSpeed, ifHighSpeed";
         }

         container statistics {
           config false;
           description
             "A collection of interface-related statistics objects.";

           leaf discontinuity-time {
             type yang:date-and-time;
             mandatory true;
             description
               "The time on the most recent occasion at which any one or
                more of this interface's counters suffered a
                discontinuity.  If no such discontinuities have occurred
                since the last re-initialization of the local management
                subsystem, then this node contains the time the local
                management subsystem re-initialized itself.";
           }

           leaf in-octets {
             type yang:counter64;
             description
               "The total number of octets received on the interface,
                including framing characters.
Top   ToC   RFC8343 - Page 20
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCInOctets";
           }

           leaf in-unicast-pkts {
             type yang:counter64;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCInUcastPkts";
           }

           leaf in-broadcast-pkts {
             type yang:counter64;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCInBroadcastPkts";
           }

           leaf in-multicast-pkts {
             type yang:counter64;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that were addressed to a multicast
                address at this sub-layer.  For a MAC-layer protocol,
                this includes both Group and Functional addresses.
Top   ToC   RFC8343 - Page 21
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCInMulticastPkts";
           }

           leaf in-discards {
             type yang:counter32;
             description
               "The number of inbound packets that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInDiscards";
           }

           leaf in-errors {
             type yang:counter32;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInErrors";
           }

           leaf in-unknown-protos {
             type yang:counter32;
Top   ToC   RFC8343 - Page 22
             description
               "For packet-oriented interfaces, the number of packets
                received via the interface that 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 that were
                discarded because of an unknown or unsupported protocol.
                For any interface that does not support protocol
                multiplexing, this counter is not present.

                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInUnknownProtos";
           }


           leaf out-octets {
             type yang:counter64;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCOutOctets";
           }

           leaf out-unicast-pkts {
             type yang:counter64;
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCOutUcastPkts";
Top   ToC   RFC8343 - Page 23
           }

           leaf out-broadcast-pkts {
             type yang:counter64;
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCOutBroadcastPkts";
           }

           leaf out-multicast-pkts {
             type yang:counter64;
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCOutMulticastPkts";
           }

           leaf out-discards {
             type yang:counter32;
             description
               "The number of outbound packets that 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.
Top   ToC   RFC8343 - Page 24
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifOutDiscards";
           }

           leaf out-errors {
             type yang:counter32;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifOutErrors";
           }
         }

       }
     }

     /*
      * Legacy typedefs
      */

     typedef interface-state-ref {
       type leafref {
         path "/if:interfaces-state/if:interface/if:name";
       }
       status deprecated;
       description
         "This type is used by data models that need to reference
          the operationally present interfaces.";
     }

     /*
      * Legacy operational state data nodes
      */

     container interfaces-state {
Top   ToC   RFC8343 - Page 25
       config false;
       status deprecated;
       description
         "Data nodes for the operational state of interfaces.";

       list interface {
         key "name";
         status deprecated;

         description
           "The list of interfaces on the device.

            System-controlled interfaces created by the system are
            always present in this list, whether or not they are
            configured.";

         leaf name {
           type string;
           status deprecated;
           description
             "The name of the interface.

              A server implementation MAY map this leaf to the ifName
              MIB object.  Such an implementation needs to use some
              mechanism to handle the differences in size and characters
              allowed between this leaf and ifName.  The definition of
              such a mechanism is outside the scope of this document.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifName";
         }

         leaf type {
           type identityref {
             base interface-type;
           }
           mandatory true;
           status deprecated;
           description
             "The type of the interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifType";
         }

         leaf admin-status {
           if-feature if-mib;
           type enumeration {
             enum up {
               value 1;
Top   ToC   RFC8343 - Page 26
               description
                 "Ready to pass packets.";
             }
             enum down {
               value 2;
               description
                 "Not ready to pass packets and not in some test mode.";
             }
             enum testing {
               value 3;
               description
                 "In some test mode.";
             }
           }
           mandatory true;
           status deprecated;
           description
             "The desired state of the interface.

              This leaf has the same read semantics as ifAdminStatus.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifAdminStatus";
         }

         leaf oper-status {
           type enumeration {
             enum up {
               value 1;
               description
                 "Ready to pass packets.";
             }
             enum down {
               value 2;
               description
                 "The interface does not pass any packets.";
             }
             enum testing {
               value 3;
               description
                 "In some test mode.  No operational packets can
                  be passed.";
             }
             enum unknown {
               value 4;
               description
                 "Status cannot be determined for some reason.";
             }
             enum dormant {
Top   ToC   RFC8343 - Page 27
               value 5;
               description
                 "Waiting for some external event.";
             }
             enum not-present {
               value 6;
               description
                 "Some component (typically hardware) is missing.";
             }
             enum lower-layer-down {
               value 7;
               description
                 "Down due to state of lower-layer interface(s).";
             }
           }
           mandatory true;
           status deprecated;
           description
             "The current operational state of the interface.

              This leaf has the same semantics as ifOperStatus.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifOperStatus";
         }

         leaf last-change {
           type yang:date-and-time;
           status deprecated;
           description
             "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 node is not present.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifLastChange";
         }

         leaf if-index {
           if-feature if-mib;
           type int32 {
             range "1..2147483647";
           }
           mandatory true;
           status deprecated;
           description
             "The ifIndex value for the ifEntry represented by this
              interface.";
Top   ToC   RFC8343 - Page 28
           reference
             "RFC 2863: The Interfaces Group MIB - ifIndex";
         }

         leaf phys-address {
           type yang:phys-address;
           status deprecated;
           description
             "The interface's address at its protocol sub-layer.  For
              example, for an 802.x interface, this object normally
              contains a Media Access Control (MAC) address.  The
              interface's media-specific modules must define the bit
              and byte ordering and the format of the value of this
              object.  For interfaces that do not have such an address
              (e.g., a serial line), this node is not present.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifPhysAddress";
         }

         leaf-list higher-layer-if {
           type interface-state-ref;
           status deprecated;
           description
             "A list of references to interfaces layered on top of this
              interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifStackTable";
         }

         leaf-list lower-layer-if {
           type interface-state-ref;
           status deprecated;
           description
             "A list of references to interfaces layered underneath this
              interface.";
           reference
             "RFC 2863: The Interfaces Group MIB - ifStackTable";
         }

         leaf speed {
           type yang:gauge64;
           units "bits/second";
           status deprecated;
           description
               "An estimate of the interface's current bandwidth in bits
                per second.  For interfaces that do not vary in
                bandwidth or for those where no accurate estimation can
Top   ToC   RFC8343 - Page 29
                be made, this node should contain the nominal bandwidth.
                For interfaces that have no concept of bandwidth, this
                node is not present.";
           reference
             "RFC 2863: The Interfaces Group MIB -
                        ifSpeed, ifHighSpeed";
         }

         container statistics {
           status deprecated;
           description
             "A collection of interface-related statistics objects.";

           leaf discontinuity-time {
             type yang:date-and-time;
             mandatory true;
             status deprecated;
             description
               "The time on the most recent occasion at which any one or
                more of this interface's counters suffered a
                discontinuity.  If no such discontinuities have occurred
                since the last re-initialization of the local management
                subsystem, then this node contains the time the local
                management subsystem re-initialized itself.";
           }

           leaf in-octets {
             type yang:counter64;
             status deprecated;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCInOctets";
           }

           leaf in-unicast-pkts {
             type yang:counter64;
             status deprecated;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that were not addressed to a
                multicast or broadcast address at this sub-layer.
Top   ToC   RFC8343 - Page 30
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCInUcastPkts";
           }

           leaf in-broadcast-pkts {
             type yang:counter64;
             status deprecated;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCInBroadcastPkts";
           }

           leaf in-multicast-pkts {
             type yang:counter64;
             status deprecated;
             description
               "The number of packets, delivered by this sub-layer to a
                higher (sub-)layer, that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCInMulticastPkts";
           }

           leaf in-discards {
             type yang:counter32;
             status deprecated;
Top   ToC   RFC8343 - Page 31
             description
               "The number of inbound packets that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInDiscards";
           }

           leaf in-errors {
             type yang:counter32;
             status deprecated;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInErrors";
           }

           leaf in-unknown-protos {
             type yang:counter32;
             status deprecated;
             description
               "For packet-oriented interfaces, the number of packets
                received via the interface that 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 that were
                discarded because of an unknown or unsupported protocol.
                For any interface that does not support protocol
                multiplexing, this counter is not present.
Top   ToC   RFC8343 - Page 32
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifInUnknownProtos";
           }


           leaf out-octets {
             type yang:counter64;
             status deprecated;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCOutOctets";
           }

           leaf out-unicast-pkts {
             type yang:counter64;
             status deprecated;
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifHCOutUcastPkts";
           }

           leaf out-broadcast-pkts {
             type yang:counter64;
             status deprecated;
Top   ToC   RFC8343 - Page 33
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCOutBroadcastPkts";
           }

           leaf out-multicast-pkts {
             type yang:counter64;
             status deprecated;
             description
               "The total number of packets that higher-level protocols
                requested be transmitted and that 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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB -
                          ifHCOutMulticastPkts";
           }

           leaf out-discards {
             type yang:counter32;
             status deprecated;
             description
               "The number of outbound packets that 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.
Top   ToC   RFC8343 - Page 34
                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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifOutDiscards";
           }

           leaf out-errors {
             type yang:counter32;
             status deprecated;
             description
               "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
                'discontinuity-time'.";
             reference
               "RFC 2863: The Interfaces Group MIB - ifOutErrors";
           }
         }
       }
     }
   }

   <CODE ENDS>



(page 34 continued on part 3)

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