module IP-MIB {

    yang-version 1;

    namespace
      "urn:ietf:params:xml:ns:yang:smiv2:IP-MIB";

    prefix IP-MIB;

    import IF-MIB {
      prefix if-mib;
    }
    import INET-ADDRESS-MIB {
      prefix inet-address;
    }
    import SNMPv2-TC {
      prefix snmpv2-tc;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import ietf-yang-smiv2 {
      prefix smiv2;
    }
    import ietf-yang-types {
      prefix yang;
    }

    organization
      "IETF IPv6 MIB Revision Team";

    contact
      "Editor:
    
    
    Shawn A. Routhier
    Interworking Labs
    108 Whispering Pines Dr. Suite 235
    Scotts Valley, CA 95066
    USA
    EMail: <sar@iwl.com>";

    description
      "The MIB module for managing IP and ICMP implementations, but
    excluding their management of IP routes.
    
    Copyright (C) The Internet Society (2006).  This version of
    this MIB module is part of RFC 4293; see the RFC itself for
    full legal notices.";

    revision "2006-02-02" {
      description
        "The IP version neutral revision with added IPv6 objects for
      ND, default routers, and router advertisements.  As well as
      being the successor to RFC 2011, this MIB is also the
      successor to RFCs 2465 and 2466.  Published as RFC 4293.";
    }

    revision "1994-11-01" {
      description
        "A separate MIB module (IP-MIB) for IP and ICMP management
      objects.  Published as RFC 2011.";
    }

    revision "1991-03-31" {
      description
        "The initial revision of this MIB module was part of MIB-II,
      which was published as RFC 1213.";
    }

    smiv2:alias "ip" {
      smiv2:oid "1.3.6.1.2.1.4";
    }
    smiv2:alias "ipTrafficStats" {
      smiv2:oid "1.3.6.1.2.1.4.31";
    }
    smiv2:alias "icmp" {
      smiv2:oid "1.3.6.1.2.1.5";
    }
    smiv2:alias "ipMIB" {
      smiv2:oid "1.3.6.1.2.1.48";
    }
    smiv2:alias "ipMIBConformance" {
      smiv2:oid "1.3.6.1.2.1.48.2";
    }
    smiv2:alias "ipMIBCompliances" {
      smiv2:oid "1.3.6.1.2.1.48.2.1";
    }
    smiv2:alias "ipMIBGroups" {
      smiv2:oid "1.3.6.1.2.1.48.2.2";
    }

    typedef IpAddressOriginTC {
      type enumeration {
        enum "other" {
          value 1;
        }
        enum "manual" {
          value 2;
        }
        enum "dhcp" {
          value 4;
        }
        enum "linklayer" {
          value 5;
        }
        enum "random" {
          value 6;
        }
      }
      description
        "The origin of the address.
      
      manual(2) indicates that the address was manually configured
      to a specified address, e.g., by user configuration.
      
      dhcp(4) indicates an address that was assigned to this
      system by a DHCP server.
      
      linklayer(5) indicates an address created by IPv6 stateless
      
      
      auto-configuration.
      
      random(6) indicates an address chosen by the system at
      random, e.g., an IPv4 address within 169.254/16, or an RFC
      3041 privacy address.";
    }

    typedef IpAddressStatusTC {
      type enumeration {
        enum "preferred" {
          value 1;
        }
        enum "deprecated" {
          value 2;
        }
        enum "invalid" {
          value 3;
        }
        enum "inaccessible" {
          value 4;
        }
        enum "unknown" {
          value 5;
        }
        enum "tentative" {
          value 6;
        }
        enum "duplicate" {
          value 7;
        }
        enum "optimistic" {
          value 8;
        }
      }
      description
        "The status of an address.  Most of the states correspond to
      states from the IPv6 Stateless Address Autoconfiguration
      protocol.
      
      The preferred(1) state indicates that this is a valid
      address that can appear as the destination or source address
      of a packet.
      
      The deprecated(2) state indicates that this is a valid but
      deprecated address that should no longer be used as a source
      address in new communications, but packets addressed to such
      an address are processed as expected.
      
      The invalid(3) state indicates that this isn't a valid
      address and it shouldn't appear as the destination or source
      address of a packet.
      
      The inaccessible(4) state indicates that the address is not
      accessible because the interface to which this address is
      assigned is not operational.
      
      The unknown(5) state indicates that the status cannot be
      determined for some reason.
      
      The tentative(6) state indicates that the uniqueness of the
      address on the link is being verified.  Addresses in this
      state should not be used for general communication and
      should only be used to determine the uniqueness of the
      address.
      
      The duplicate(7) state indicates the address has been
      determined to be non-unique on the link and so must not be
      
      
      used.
      
      The optimistic(8) state indicates the address is available
      for use, subject to restrictions, while its uniqueness on
      a link is being verified.
      
      In the absence of other information, an IPv4 address is
      always preferred(1).";
      reference
        "RFC 2462";

    }

    typedef IpAddressPrefixOriginTC {
      type enumeration {
        enum "other" {
          value 1;
        }
        enum "manual" {
          value 2;
        }
        enum "wellknown" {
          value 3;
        }
        enum "dhcp" {
          value 4;
        }
        enum "routeradv" {
          value 5;
        }
      }
      description
        "The origin of this prefix.
      
      manual(2) indicates a prefix that was manually configured.
      
      wellknown(3) indicates a well-known prefix, e.g., 169.254/16
      for IPv4 auto-configuration or fe80::/10 for IPv6 link-local
      addresses.  Well known prefixes may be assigned by IANA,
      the address registries, or by specification in a standards
      track RFC.
      
      dhcp(4) indicates a prefix that was assigned by a DHCP
      server.
      
      routeradv(5) indicates a prefix learned from a router
      advertisement.
      
      Note: while IpAddressOriginTC and IpAddressPrefixOriginTC
      are similar, they are not identical.  The first defines how
      an address was created, while the second defines how a
      prefix was found.";
    }

    typedef Ipv6AddressIfIdentifierTC {
      type string {
        smiv2:display-hint "2x:";
      }
      description
        "This data type is used to model IPv6 address
      interface identifiers.  This is a binary string
      of up to 8 octets in network byte-order.";
    }

    container IP-MIB {
      config false;
      container ip {
        smiv2:oid "1.3.6.1.2.1.4";
        leaf ipForwarding {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.1";
          type enumeration {
            enum "forwarding" {
              value 1;
            }
            enum "notForwarding" {
              value 2;
            }
          }
          description
            "The indication of whether this entity is acting as an IPv4
          router in respect to the forwarding of datagrams received
          by, but not addressed to, this entity.  IPv4 routers forward
          datagrams.  IPv4 hosts do not (except those source-routed
          via the host).
          
          When this object is written, the entity should save the
          change to non-volatile storage and restore the object from
          non-volatile storage upon re-initialization of the system.
          Note: a stronger requirement is not used because this object
          was previously defined.";
        }

        leaf ipDefaultTTL {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.2";
          type int32 {
            range "1..255";
          }
          description
            "The default value inserted into the Time-To-Live field of
          the IPv4 header of datagrams originated at this entity,
          whenever a TTL value is not supplied by the transport layer
          
          
          protocol.
          
          When this object is written, the entity should save the
          change to non-volatile storage and restore the object from
          non-volatile storage upon re-initialization of the system.
          Note: a stronger requirement is not used because this object
          was previously defined.";
        }

        leaf ipInReceives {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.3";
          type yang:counter32;
          status deprecated;
          description
            "The total number of input datagrams received from
          interfaces, including those received in error.
          
          This object has been deprecated, as a new IP version-neutral
          
          
          table has been added.  It is loosely replaced by
          ipSystemStatsInRecieves.";
        }

        leaf ipInHdrErrors {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.4";
          type yang:counter32;
          status deprecated;
          description
            "The number of input datagrams discarded due to errors in
          their IPv4 headers, including bad checksums, version number
          mismatch, other format errors, time-to-live exceeded, errors
          discovered in processing their IPv4 options, etc.
          
          This object has been deprecated as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsInHdrErrors.";
        }

        leaf ipInAddrErrors {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.5";
          type yang:counter32;
          status deprecated;
          description
            "The number of input datagrams discarded because the IPv4
          address in their IPv4 header's destination field was not a
          valid address to be received at this entity.  This count
          includes invalid addresses (e.g., 0.0.0.0) and addresses of
          unsupported Classes (e.g., Class E).  For entities which are
          not IPv4 routers, and therefore do not forward datagrams,
          this counter includes datagrams discarded because the
          destination address was not a local address.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsInAddrErrors.";
        }

        leaf ipForwDatagrams {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.6";
          type yang:counter32;
          status deprecated;
          description
            "The number of input datagrams for which this entity was not
          their final IPv4 destination, as a result of which an
          attempt was made to find a route to forward them to that
          final destination.  In entities which do not act as IPv4
          routers, this counter will include only those packets which
          
          
          were Source-Routed via this entity, and the Source-Route
          option processing was successful.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsInForwDatagrams.";
        }

        leaf ipInUnknownProtos {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.7";
          type yang:counter32;
          status deprecated;
          description
            "The number of locally-addressed datagrams received
          successfully but discarded because of an unknown or
          unsupported protocol.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsInUnknownProtos.";
        }

        leaf ipInDiscards {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.8";
          type yang:counter32;
          status deprecated;
          description
            "The number of input IPv4 datagrams for which no problems
          were encountered to prevent their continued processing, but
          which were discarded (e.g., for lack of buffer space).  Note
          that this counter does not include any datagrams discarded
          while awaiting re-assembly.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsInDiscards.";
        }

        leaf ipInDelivers {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.9";
          type yang:counter32;
          status deprecated;
          description
            "The total number of input datagrams successfully delivered
          to IPv4 user-protocols (including ICMP).
          
          This object has been deprecated as a new IP version neutral
          table has been added.  It is loosely replaced by
          
          
          ipSystemStatsIndelivers.";
        }

        leaf ipOutRequests {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.10";
          type yang:counter32;
          status deprecated;
          description
            "The total number of IPv4 datagrams which local IPv4 user
          protocols (including ICMP) supplied to IPv4 in requests for
          transmission.  Note that this counter does not include any
          datagrams counted in ipForwDatagrams.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsOutRequests.";
        }

        leaf ipOutDiscards {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.11";
          type yang:counter32;
          status deprecated;
          description
            "The number of output IPv4 datagrams for which no problem was
          encountered to prevent their transmission to their
          destination, but which were discarded (e.g., for lack of
          buffer space).  Note that this counter would include
          datagrams counted in ipForwDatagrams if any such packets met
          this (discretionary) discard criterion.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsOutDiscards.";
        }

        leaf ipOutNoRoutes {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.12";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 datagrams discarded because no route
          could be found to transmit them to their destination.  Note
          that this counter includes any packets counted in
          ipForwDatagrams which meet this `no-route' criterion.  Note
          that this includes any datagrams which a host cannot route
          because all of its default routers are down.
          
          This object has been deprecated, as a new IP version-neutral
          
          
          table has been added.  It is loosely replaced by
          ipSystemStatsOutNoRoutes.";
        }

        leaf ipReasmTimeout {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.13";
          type int32;
          units "seconds";
          description
            "The maximum number of seconds that received fragments are
          held while they are awaiting reassembly at this entity.";
        }

        leaf ipReasmReqds {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.14";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 fragments received which needed to be
          reassembled at this entity.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsReasmReqds.";
        }

        leaf ipReasmOKs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.15";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 datagrams successfully re-assembled.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsReasmOKs.";
        }

        leaf ipReasmFails {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.16";
          type yang:counter32;
          status deprecated;
          description
            "The number of failures detected by the IPv4 re-assembly
          algorithm (for whatever reason: timed out, errors, etc).
          Note that this is not necessarily a count of discarded IPv4
          fragments since some algorithms (notably the algorithm in
          RFC 815) can lose track of the number of fragments by
          combining them as they are received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsReasmFails.";
        }

        leaf ipFragOKs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.17";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 datagrams that have been successfully
          fragmented at this entity.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsOutFragOKs.";
        }

        leaf ipFragFails {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.18";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 datagrams that have been discarded
          because they needed to be fragmented at this entity but
          could not be, e.g., because their Don't Fragment flag was
          set.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsOutFragFails.";
        }

        leaf ipFragCreates {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.19";
          type yang:counter32;
          status deprecated;
          description
            "The number of IPv4 datagram fragments that have been
          generated as a result of fragmentation at this entity.
          
          This object has been deprecated as a new IP version neutral
          table has been added.  It is loosely replaced by
          ipSystemStatsOutFragCreates.";
        }

        leaf ipRoutingDiscards {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.23";
          type yang:counter32;
          status deprecated;
          description
            "The number of routing entries which were chosen to be
          discarded even though they are valid.  One possible reason
          for discarding such an entry could be to free-up buffer
          space for other routing entries.
          
          
          This object was defined in pre-IPv6 versions of the IP MIB.
          It was implicitly IPv4 only, but the original specifications
          did not indicate this protocol restriction.  In order to
          clarify the specifications, this object has been deprecated
          and a similar, but more thoroughly clarified, object has
          been added to the IP-FORWARD-MIB.";
        }

        leaf ipv6IpForwarding {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.25";
          type enumeration {
            enum "forwarding" {
              value 1;
            }
            enum "notForwarding" {
              value 2;
            }
          }
          description
            "The indication of whether this entity is acting as an IPv6
          router on any interface in respect to the forwarding of
          datagrams received by, but not addressed to, this entity.
          IPv6 routers forward datagrams.  IPv6 hosts do not (except
          those source-routed via the host).
          
          When this object is written, the entity SHOULD save the
          change to non-volatile storage and restore the object from
          non-volatile storage upon re-initialization of the system.";
        }

        leaf ipv6IpDefaultHopLimit {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.26";
          type int32 {
            range "0..255";
          }
          description
            "The default value inserted into the Hop Limit field of the
          IPv6 header of datagrams originated at this entity whenever
          a Hop Limit value is not supplied by the transport layer
          protocol.
          
          When this object is written, the entity SHOULD save the
          change to non-volatile storage and restore the object from
          non-volatile storage upon re-initialization of the system.";
          reference
            "RFC 2461 Section 6.3.2";

        }

        leaf ipv4InterfaceTableLastChange {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.27";
          type yang:timestamp;
          description
            "The value of sysUpTime on the most recent occasion at which
          a row in the ipv4InterfaceTable was added or deleted, or
          when an ipv4InterfaceReasmMaxSize or an
          ipv4InterfaceEnableStatus object was modified.
          
          If new objects are added to the ipv4InterfaceTable that
          require the ipv4InterfaceTableLastChange to be updated when
          they are modified, they must specify that requirement in
          their description clause.";
        }

        leaf ipv6InterfaceTableLastChange {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.29";
          type yang:timestamp;
          description
            "The value of sysUpTime on the most recent occasion at which
          a row in the ipv6InterfaceTable was added or deleted or when
          an ipv6InterfaceReasmMaxSize, ipv6InterfaceIdentifier,
          ipv6InterfaceEnableStatus, ipv6InterfaceReachableTime,
          ipv6InterfaceRetransmitTime, or ipv6InterfaceForwarding
          object was modified.
          
          If new objects are added to the ipv6InterfaceTable that
          require the ipv6InterfaceTableLastChange to be updated when
          they are modified, they must specify that requirement in
          their description clause.";
        }

        leaf ipAddressSpinLock {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.33";
          type snmpv2-tc:TestAndIncr;
          description
            "An advisory lock used to allow cooperating SNMP managers to
          coordinate their use of the set operation in creating or
          modifying rows within this table.
          
          In order to use this lock to coordinate the use of set
          operations, managers should first retrieve
          ipAddressTableSpinLock.  They should then determine the
          appropriate row to create or modify.  Finally, they should
          issue the appropriate set command, including the retrieved
          value of ipAddressSpinLock.  If another manager has altered
          the table in the meantime, then the value of
          ipAddressSpinLock will have changed, and the creation will
          fail as it will be specifying an incorrect value for
          ipAddressSpinLock.  It is suggested, but not required, that
          the ipAddressSpinLock be the first var bind for each set of
          objects representing a 'row' in a PDU.";
        }

        leaf ipv6RouterAdvertSpinLock {
          smiv2:max-access "read-write";
          smiv2:oid "1.3.6.1.2.1.4.38";
          type snmpv2-tc:TestAndIncr;
          description
            "An advisory lock used to allow cooperating SNMP managers to
          coordinate their use of the set operation in creating or
          modifying rows within this table.
          
          In order to use this lock to coordinate the use of set
          operations, managers should first retrieve
          ipv6RouterAdvertSpinLock.  They should then determine the
          appropriate row to create or modify.  Finally, they should
          issue the appropriate set command including the retrieved
          value of ipv6RouterAdvertSpinLock.  If another manager has
          altered the table in the meantime, then the value of
          ipv6RouterAdvertSpinLock will have changed and the creation
          will fail as it will be specifying an incorrect value for
          ipv6RouterAdvertSpinLock.  It is suggested, but not
          required, that the ipv6RouterAdvertSpinLock be the first var
          bind for each set of objects representing a 'row' in a PDU.";
        }
      }  // container ip

      container ipTrafficStats {
        smiv2:oid "1.3.6.1.2.1.4.31";
        leaf ipIfStatsTableLastChange {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.4.31.2";
          type yang:timestamp;
          description
            "The value of sysUpTime on the most recent occasion at which
          a row in the ipIfStatsTable was added or deleted.
          
          If new objects are added to the ipIfStatsTable that require
          the ipIfStatsTableLastChange to be updated when they are
          modified, they must specify that requirement in their
          description clause.";
        }
      }  // container ipTrafficStats

      container icmp {
        smiv2:oid "1.3.6.1.2.1.5";
        leaf icmpInMsgs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.1";
          type yang:counter32;
          status deprecated;
          description
            "The total number of ICMP messages which the entity received.
          Note that this counter includes all those counted by
          icmpInErrors.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          icmpStatsInMsgs.";
        }

        leaf icmpInErrors {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.2";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP messages which the entity received but
          determined as having ICMP-specific errors (bad ICMP
          checksums, bad length, etc.).
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          icmpStatsInErrors.";
        }

        leaf icmpInDestUnreachs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.3";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Destination Unreachable messages
          received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInTimeExcds {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.4";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Time Exceeded messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInParmProbs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.5";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Parameter Problem messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInSrcQuenchs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.6";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Source Quench messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInRedirects {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.7";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Redirect messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInEchos {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.8";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Echo (request) messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInEchoReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.9";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Echo Reply messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInTimestamps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.10";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Timestamp (request) messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInTimestampReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.11";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Timestamp Reply messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInAddrMasks {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.12";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Address Mask Request messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpInAddrMaskReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.13";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Address Mask Reply messages received.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutMsgs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.14";
          type yang:counter32;
          status deprecated;
          description
            "The total number of ICMP messages which this entity
          attempted to send.  Note that this counter includes all
          those counted by icmpOutErrors.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          icmpStatsOutMsgs.";
        }

        leaf icmpOutErrors {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.15";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP messages which this entity did not send
          due to problems discovered within ICMP, such as a lack of
          buffers.  This value should not include errors discovered
          outside the ICMP layer, such as the inability of IP to route
          the resultant datagram.  In some implementations, there may
          be no types of error which contribute to this counter's
          value.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by
          icmpStatsOutErrors.";
        }

        leaf icmpOutDestUnreachs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.16";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Destination Unreachable messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutTimeExcds {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.17";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Time Exceeded messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutParmProbs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.18";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Parameter Problem messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutSrcQuenchs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.19";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Source Quench messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutRedirects {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.20";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Redirect messages sent.  For a host, this
          object will always be zero, since hosts do not send
          redirects.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutEchos {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.21";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Echo (request) messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutEchoReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.22";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Echo Reply messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutTimestamps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.23";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Timestamp (request) messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutTimestampReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.24";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Timestamp Reply messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutAddrMasks {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.25";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Address Mask Request messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }

        leaf icmpOutAddrMaskReps {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.5.26";
          type yang:counter32;
          status deprecated;
          description
            "The number of ICMP Address Mask Reply messages sent.
          
          This object has been deprecated, as a new IP version-neutral
          table has been added.  It is loosely replaced by a column in
          the icmpMsgStatsTable.";
        }
      }  // container icmp

      container ipAddrTable {
        smiv2:oid "1.3.6.1.2.1.4.20";
        status deprecated;
        description
          "The table of addressing information relevant to this
        entity's IPv4 addresses.
        
        This table has been deprecated, as a new IP version-neutral
        table has been added.  It is loosely replaced by the
        ipAddressTable although several objects that weren't deemed
        useful weren't carried forward while another
        (ipAdEntReasmMaxSize) was moved to the ipv4InterfaceTable.";
        list ipAddrEntry {
          smiv2:oid "1.3.6.1.2.1.4.20.1";
          key "ipAdEntAddr";
          status deprecated;
          description
            "The addressing information for one of this entity's IPv4
          addresses.";
          leaf ipAdEntAddr {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.20.1.1";
            type inet:ipv4-address;
            status deprecated;
            description
              "The IPv4 address to which this entry's addressing
            information pertains.";
          }

          leaf ipAdEntIfIndex {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.20.1.2";
            type int32 {
              range "1..2147483647";
            }
            status deprecated;
            description
              "The index value which uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipAdEntNetMask {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.20.1.3";
            type inet:ipv4-address;
            status deprecated;
            description
              "The subnet mask associated with the IPv4 address of this
            entry.  The value of the mask is an IPv4 address with all
            the network bits set to 1 and all the hosts bits set to 0.";
          }

          leaf ipAdEntBcastAddr {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.20.1.4";
            type int32 {
              range "0..1";
            }
            status deprecated;
            description
              "The value of the least-significant bit in the IPv4 broadcast
            address used for sending datagrams on the (logical)
            interface associated with the IPv4 address of this entry.
            For example, when the Internet standard all-ones broadcast
            address is used, the value will be 1.  This value applies to
            both the subnet and network broadcast addresses used by the
            entity on this (logical) interface.";
          }

          leaf ipAdEntReasmMaxSize {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.20.1.5";
            type int32 {
              range "0..65535";
            }
            status deprecated;
            description
              "The size of the largest IPv4 datagram which this entity can
            re-assemble from incoming IPv4 fragmented datagrams received
            on this interface.";
          }
        }  // list ipAddrEntry
      }  // container ipAddrTable

      container ipNetToMediaTable {
        smiv2:oid "1.3.6.1.2.1.4.22";
        status deprecated;
        description
          "The IPv4 Address Translation table used for mapping from
        IPv4 addresses to physical addresses.
        
        This table has been deprecated, as a new IP version-neutral
        table has been added.  It is loosely replaced by the
        ipNetToPhysicalTable.";
        list ipNetToMediaEntry {
          smiv2:oid "1.3.6.1.2.1.4.22.1";
          key "ipNetToMediaIfIndex ipNetToMediaNetAddress";
          status deprecated;
          description
            "Each entry contains one IpAddress to `physical' address
          equivalence.";
          leaf ipNetToMediaIfIndex {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.22.1.1";
            type int32 {
              range "1..2147483647";
            }
            status deprecated;
            description
              "The interface on which this entry's equivalence is
            effective.  The interface identified by a particular value
            of this index is the same interface as identified by the
            
            
            same value of the IF-MIB's ifIndex.
            
            This object predates the rule limiting index objects to a
            max access value of 'not-accessible' and so continues to use
            a value of 'read-create'.";
          }

          leaf ipNetToMediaPhysAddress {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.22.1.2";
            type yang:phys-address {
              length "0..65535";
            }
            status deprecated;
            description
              "The media-dependent `physical' address.  This object should
            return 0 when this entry is in the 'incomplete' state.
            
            As the entries in this table are typically not persistent
            when this object is written the entity should not save the
            change to non-volatile storage.  Note: a stronger
            requirement is not used because this object was previously
            defined.";
          }

          leaf ipNetToMediaNetAddress {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.22.1.3";
            type inet:ipv4-address;
            status deprecated;
            description
              "The IpAddress corresponding to the media-dependent
            `physical' address.
            
            This object predates the rule limiting index objects to a
            max access value of 'not-accessible' and so continues to use
            a value of 'read-create'.";
          }

          leaf ipNetToMediaType {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.22.1.4";
            type enumeration {
              enum "other" {
                value 1;
              }
              enum "invalid" {
                value 2;
              }
              enum "dynamic" {
                value 3;
              }
              enum "static" {
                value 4;
              }
            }
            status deprecated;
            description
              "The type of mapping.
            
            Setting this object to the value invalid(2) has the effect
            
            
            of invalidating the corresponding entry in the
            ipNetToMediaTable.  That is, it effectively dis-associates
            the interface identified with said entry from the mapping
            identified with said entry.  It is an implementation-
            specific matter as to whether the agent removes an
            invalidated entry from the table.  Accordingly, management
            stations must be prepared to receive tabular information
            from agents that corresponds to entries not currently in
            use.  Proper interpretation of such entries requires
            examination of the relevant ipNetToMediaType object.
            
            As the entries in this table are typically not persistent
            when this object is written the entity should not save the
            change to non-volatile storage.  Note: a stronger
            requirement is not used because this object was previously
            defined.";
          }
        }  // list ipNetToMediaEntry
      }  // container ipNetToMediaTable

      container ipv4InterfaceTable {
        smiv2:oid "1.3.6.1.2.1.4.28";
        description
          "The table containing per-interface IPv4-specific
        information.";
        list ipv4InterfaceEntry {
          smiv2:oid "1.3.6.1.2.1.4.28.1";
          key "ipv4InterfaceIfIndex";
          description
            "An entry containing IPv4-specific information for a specific
          interface.";
          leaf ipv4InterfaceIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.28.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipv4InterfaceReasmMaxSize {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.28.1.2";
            type int32 {
              range "0..65535";
            }
            description
              "The size of the largest IPv4 datagram that this entity can
            re-assemble from incoming IPv4 fragmented datagrams received
            on this interface.";
          }

          leaf ipv4InterfaceEnableStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.28.1.3";
            type enumeration {
              enum "up" {
                value 1;
              }
              enum "down" {
                value 2;
              }
            }
            description
              "The indication of whether IPv4 is enabled (up) or disabled
            (down) on this interface.  This object does not affect the
            state of the interface itself, only its connection to an
            IPv4 stack.  The IF-MIB should be used to control the state
            of the interface.";
          }

          leaf ipv4InterfaceRetransmitTime {
            smiv2:defval "1000";
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.28.1.4";
            type uint32;
            units "milliseconds";
            description
              "The time between retransmissions of ARP requests to a
            neighbor when resolving the address or when probing the
            reachability of a neighbor.";
            reference
              "RFC 1122";

          }
        }  // list ipv4InterfaceEntry
      }  // container ipv4InterfaceTable

      container ipv6InterfaceTable {
        smiv2:oid "1.3.6.1.2.1.4.30";
        description
          "The table containing per-interface IPv6-specific
        information.";
        list ipv6InterfaceEntry {
          smiv2:oid "1.3.6.1.2.1.4.30.1";
          key "ipv6InterfaceIfIndex";
          description
            "An entry containing IPv6-specific information for a given
          interface.";
          leaf ipv6InterfaceIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.30.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipv6InterfaceReasmMaxSize {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.30.1.2";
            type uint32 {
              range "1500..65535";
            }
            units "octets";
            description
              "The size of the largest IPv6 datagram that this entity can
            re-assemble from incoming IPv6 fragmented datagrams received
            on this interface.";
          }

          leaf ipv6InterfaceIdentifier {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.30.1.3";
            type Ipv6AddressIfIdentifierTC;
            description
              "The Interface Identifier for this interface.  The Interface
            Identifier is combined with an address prefix to form an
            interface address.
            
            By default, the Interface Identifier is auto-configured
            according to the rules of the link type to which this
            interface is attached.
            
            
            A zero length identifier may be used where appropriate.  One
            possible example is a loopback interface.";
          }

          leaf ipv6InterfaceEnableStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.30.1.5";
            type enumeration {
              enum "up" {
                value 1;
              }
              enum "down" {
                value 2;
              }
            }
            description
              "The indication of whether IPv6 is enabled (up) or disabled
            (down) on this interface.  This object does not affect the
            state of the interface itself, only its connection to an
            IPv6 stack.  The IF-MIB should be used to control the state
            of the interface.
            
            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system.";
          }

          leaf ipv6InterfaceReachableTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.30.1.6";
            type uint32;
            units "milliseconds";
            description
              "The time a neighbor is considered reachable after receiving
            a reachability confirmation.";
            reference
              "RFC 2461, Section 6.3.2";

          }

          leaf ipv6InterfaceRetransmitTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.30.1.7";
            type uint32;
            units "milliseconds";
            description
              "The time between retransmissions of Neighbor Solicitation
            messages to a neighbor when resolving the address or when
            probing the reachability of a neighbor.";
            reference
              "RFC 2461, Section 6.3.2";

          }

          leaf ipv6InterfaceForwarding {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.30.1.8";
            type enumeration {
              enum "forwarding" {
                value 1;
              }
              enum "notForwarding" {
                value 2;
              }
            }
            description
              "The indication of whether this entity is acting as an IPv6
            router on this interface with respect to the forwarding of
            datagrams received by, but not addressed to, this entity.
            IPv6 routers forward datagrams.  IPv6 hosts do not (except
            those source-routed via the host).
            
            This object is constrained by ipv6IpForwarding and is
            ignored if ipv6IpForwarding is set to notForwarding.  Those
            systems that do not provide per-interface control of the
            forwarding function should set this object to forwarding for
            all interfaces and allow the ipv6IpForwarding object to
            control the forwarding capability.
            
            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system.";
          }
        }  // list ipv6InterfaceEntry
      }  // container ipv6InterfaceTable

      container ipSystemStatsTable {
        smiv2:oid "1.3.6.1.2.1.4.31.1";
        description
          "The table containing system wide, IP version specific
        traffic statistics.  This table and the ipIfStatsTable
        contain similar objects whose difference is in their
        granularity.  Where this table contains system wide traffic
        statistics, the ipIfStatsTable contains the same statistics
        but counted on a per-interface basis.";
        list ipSystemStatsEntry {
          smiv2:oid "1.3.6.1.2.1.4.31.1.1";
          key "ipSystemStatsIPVersion";
          description
            "A statistics entry containing system-wide objects for a
          particular IP version.";
          leaf ipSystemStatsIPVersion {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.1";
            type inet:ip-version;
            description
              "The IP version of this row.";
          }

          leaf ipSystemStatsInReceives {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.3";
            type yang:counter32;
            description
              "The total number of input IP datagrams received, including
            those received in error.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInReceives {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.4";
            type yang:counter64;
            description
              "The total number of input IP datagrams received, including
            those received in error.  This object counts the same
            datagrams as ipSystemStatsInReceives, but allows for larger
            values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.5";
            type yang:counter32;
            description
              "The total number of octets received in input IP datagrams,
            including those received in error.  Octets from datagrams
            counted in ipSystemStatsInReceives MUST be counted here.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.6";
            type yang:counter64;
            description
              "The total number of octets received in input IP datagrams,
            including those received in error.  This object counts the
            same octets as ipSystemStatsInOctets, but allows for larger
            
            
            values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInHdrErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.7";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded due to errors in
            their IP headers, including version number mismatch, other
            format errors, hop count exceeded, errors discovered in
            processing their IP options, etc.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInNoRoutes {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.8";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because no route
            could be found to transmit them to their destination.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInAddrErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.9";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because the IP
            address in their IP header's destination field was not a
            valid address to be received at this entity.  This count
            includes invalid addresses (e.g., ::0).  For entities
            that are not IP routers and therefore do not forward
            
            
            datagrams, this counter includes datagrams discarded
            because the destination address was not a local address.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInUnknownProtos {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.10";
            type yang:counter32;
            description
              "The number of locally-addressed IP datagrams received
            successfully but discarded because of an unknown or
            unsupported protocol.
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInTruncatedPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.11";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because the
            datagram frame didn't carry enough data.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.12";
            type yang:counter32;
            description
              "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  In entities that do not act as IP routers,
            this counter will include only those datagrams that were
            Source-Routed via this entity, and the Source-Route
            processing was successful.
            
            When tracking interface statistics, the counter of the
            incoming interface is incremented for each datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.13";
            type yang:counter64;
            description
              "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  This object counts the same packets as
            ipSystemStatsInForwDatagrams, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsReasmReqds {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.14";
            type yang:counter32;
            description
              "The number of IP fragments received that needed to be
            reassembled at this interface.
            
            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsReasmOKs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.15";
            type yang:counter32;
            description
              "The number of IP datagrams successfully reassembled.
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsReasmFails {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.16";
            type yang:counter32;
            description
              "The number of failures detected by the IP re-assembly
            algorithm (for whatever reason: timed out, errors, etc.).
            Note that this is not necessarily a count of discarded IP
            fragments since some algorithms (notably the algorithm in
            RFC 815) can lose track of the number of fragments by
            combining them as they are received.
            
            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInDiscards {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.17";
            type yang:counter32;
            description
              "The number of input IP datagrams for which no problems were
            encountered to prevent their continued processing, but
            were discarded (e.g., for lack of buffer space).  Note that
            this counter does not include any datagrams discarded while
            awaiting re-assembly.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInDelivers {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.18";
            type yang:counter32;
            description
              "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInDelivers {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.19";
            type yang:counter64;
            description
              "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).  This object counts the
            same packets as ipSystemStatsInDelivers, but allows for
            larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutRequests {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.20";
            type yang:counter32;
            description
              "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  Note that this counter does not include any
            datagrams counted in ipSystemStatsOutForwDatagrams.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutRequests {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.21";
            type yang:counter64;
            description
              "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  This object counts the same packets as
            ipSystemStatsOutRequests, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutNoRoutes {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.22";
            type yang:counter32;
            description
              "The number of locally generated IP datagrams discarded
            because no route could be found to transmit them to their
            destination.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.23";
            type yang:counter32;
            description
              "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  In entities
            that do not act as IP routers, this counter will include
            only those datagrams that were Source-Routed via this
            entity, and the Source-Route processing was successful.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            forwarded datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.24";
            type yang:counter64;
            description
              "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  This object
            counts the same packets as ipSystemStatsOutForwDatagrams,
            but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutDiscards {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.25";
            type yang:counter32;
            description
              "The number of output IP datagrams for which no problem was
            encountered to prevent their transmission to their
            destination, but were discarded (e.g., for lack of
            buffer space).  Note that this counter would include
            
            
            datagrams counted in ipSystemStatsOutForwDatagrams if any
            such datagrams met this (discretionary) discard criterion.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutFragReqds {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.26";
            type yang:counter32;
            description
              "The number of IP datagrams that would require fragmentation
            in order to be transmitted.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutFragOKs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.27";
            type yang:counter32;
            description
              "The number of IP datagrams that have been successfully
            fragmented.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutFragFails {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.28";
            type yang:counter32;
            description
              "The number of IP datagrams that have been discarded because
            they needed to be fragmented but could not be.  This
            includes IPv4 packets that have the DF bit set and IPv6
            packets that are being forwarded and exceed the outgoing
            link MTU.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for an unsuccessfully
            fragmented datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutFragCreates {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.29";
            type yang:counter32;
            description
              "The number of output datagram fragments that have been
            generated as a result of IP fragmentation.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutTransmits {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.30";
            type yang:counter32;
            description
              "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This includes
            datagrams generated locally and those forwarded by this
            entity.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutTransmits {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.31";
            type yang:counter64;
            description
              "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This object counts
            the same datagrams as ipSystemStatsOutTransmits, but allows
            for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.32";
            type yang:counter32;
            description
              "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  Octets from datagrams
            counted in ipSystemStatsOutTransmits MUST be counted here.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.33";
            type yang:counter64;
            description
              "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  This objects counts the same
            octets as ipSystemStatsOutOctets, but allows for larger
            values.
            
            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
            
            
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.34";
            type yang:counter32;
            description
              "The number of IP multicast datagrams received.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.35";
            type yang:counter64;
            description
              "The number of IP multicast datagrams received.  This object
            counts the same datagrams as ipSystemStatsInMcastPkts but
            allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.36";
            type yang:counter32;
            description
              "The total number of octets received in IP multicast
            datagrams.  Octets from datagrams counted in
            ipSystemStatsInMcastPkts MUST be counted here.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.37";
            type yang:counter64;
            description
              "The total number of octets received in IP multicast
            datagrams.  This object counts the same octets as
            ipSystemStatsInMcastOctets, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.38";
            type yang:counter32;
            description
              "The number of IP multicast datagrams transmitted.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.39";
            type yang:counter64;
            description
              "The number of IP multicast datagrams transmitted.  This
            object counts the same datagrams as
            ipSystemStatsOutMcastPkts, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.40";
            type yang:counter32;
            description
              "The total number of octets transmitted in IP multicast
            datagrams.  Octets from datagrams counted in
            
            
            ipSystemStatsOutMcastPkts MUST be counted here.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.41";
            type yang:counter64;
            description
              "The total number of octets transmitted in IP multicast
            datagrams.  This object counts the same octets as
            ipSystemStatsOutMcastOctets, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsInBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.42";
            type yang:counter32;
            description
              "The number of IP broadcast datagrams received.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCInBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.43";
            type yang:counter64;
            description
              "The number of IP broadcast datagrams received.  This object
            counts the same datagrams as ipSystemStatsInBcastPkts but
            allows for larger values.
            
            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
            
            
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsOutBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.44";
            type yang:counter32;
            description
              "The number of IP broadcast datagrams transmitted.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsHCOutBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.45";
            type yang:counter64;
            description
              "The number of IP broadcast datagrams transmitted.  This
            object counts the same datagrams as
            ipSystemStatsOutBcastPkts, but allows for larger values.
            
            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
            ipSystemStatsDiscontinuityTime.";
          }

          leaf ipSystemStatsDiscontinuityTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.46";
            type yang:timestamp;
            description
              "The value of sysUpTime on the most recent occasion at which
            any one or more of this entry's counters suffered a
            discontinuity.
            
            If no such discontinuities have occurred since the last re-
            initialization of the local management subsystem, then this
            object contains a zero value.";
          }

          leaf ipSystemStatsRefreshRate {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.1.1.47";
            type uint32;
            units "milli-seconds";
            description
              "The minimum reasonable polling interval for this entry.
            This object provides an indication of the minimum amount of
            time required to update the counters in this entry.";
          }
        }  // list ipSystemStatsEntry
      }  // container ipSystemStatsTable

      container ipIfStatsTable {
        smiv2:oid "1.3.6.1.2.1.4.31.3";
        description
          "The table containing per-interface traffic statistics.  This
        table and the ipSystemStatsTable contain similar objects
        whose difference is in their granularity.  Where this table
        contains per-interface statistics, the ipSystemStatsTable
        contains the same statistics, but counted on a system wide
        basis.";
        list ipIfStatsEntry {
          smiv2:oid "1.3.6.1.2.1.4.31.3.1";
          key "ipIfStatsIPVersion ipIfStatsIfIndex";
          description
            "An interface statistics entry containing objects for a
          particular interface and version of IP.";
          leaf ipIfStatsIPVersion {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.1";
            type inet:ip-version;
            description
              "The IP version of this row.";
          }

          leaf ipIfStatsIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.2";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipIfStatsInReceives {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.3";
            type yang:counter32;
            description
              "The total number of input IP datagrams received, including
            those received in error.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInReceives {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.4";
            type yang:counter64;
            description
              "The total number of input IP datagrams received, including
            those received in error.  This object counts the same
            datagrams as ipIfStatsInReceives, but allows for larger
            values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.5";
            type yang:counter32;
            description
              "The total number of octets received in input IP datagrams,
            including those received in error.  Octets from datagrams
            counted in ipIfStatsInReceives MUST be counted here.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.6";
            type yang:counter64;
            description
              "The total number of octets received in input IP datagrams,
            including those received in error.  This object counts the
            same octets as ipIfStatsInOctets, but allows for larger
            values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInHdrErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.7";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded due to errors in
            their IP headers, including version number mismatch, other
            format errors, hop count exceeded, errors discovered in
            processing their IP options, etc.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInNoRoutes {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.8";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because no route
            could be found to transmit them to their destination.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInAddrErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.9";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because the IP
            address in their IP header's destination field was not a
            valid address to be received at this entity.  This count
            includes invalid addresses (e.g., ::0).  For entities that
            are not IP routers and therefore do not forward datagrams,
            this counter includes datagrams discarded because the
            destination address was not a local address.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInUnknownProtos {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.10";
            type yang:counter32;
            description
              "The number of locally-addressed IP datagrams received
            successfully but discarded because of an unknown or
            unsupported protocol.
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.
            
            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
            
            
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInTruncatedPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.11";
            type yang:counter32;
            description
              "The number of input IP datagrams discarded because the
            datagram frame didn't carry enough data.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.12";
            type yang:counter32;
            description
              "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  In entities that do not act as IP routers,
            this counter will include only those datagrams that were
            Source-Routed via this entity, and the Source-Route
            processing was successful.
            
            When tracking interface statistics, the counter of the
            incoming interface is incremented for each datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.13";
            type yang:counter64;
            description
              "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  This object counts the same packets as
            
            
            ipIfStatsInForwDatagrams, but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsReasmReqds {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.14";
            type yang:counter32;
            description
              "The number of IP fragments received that needed to be
            reassembled at this interface.
            
            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsReasmOKs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.15";
            type yang:counter32;
            description
              "The number of IP datagrams successfully reassembled.
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsReasmFails {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.16";
            type yang:counter32;
            description
              "The number of failures detected by the IP re-assembly
            algorithm (for whatever reason: timed out, errors, etc.).
            Note that this is not necessarily a count of discarded IP
            fragments since some algorithms (notably the algorithm in
            RFC 815) can lose track of the number of fragments by
            combining them as they are received.
            
            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInDiscards {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.17";
            type yang:counter32;
            description
              "The number of input IP datagrams for which no problems were
            encountered to prevent their continued processing, but
            were discarded (e.g., for lack of buffer space).  Note that
            this counter does not include any datagrams discarded while
            awaiting re-assembly.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInDelivers {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.18";
            type yang:counter32;
            description
              "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).
            
            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            
            
            input interface for some of the datagrams.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInDelivers {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.19";
            type yang:counter64;
            description
              "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).  This object counts the
            same packets as ipIfStatsInDelivers, but allows for larger
            values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutRequests {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.20";
            type yang:counter32;
            description
              "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  Note that this counter does not include any
            datagrams counted in ipIfStatsOutForwDatagrams.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutRequests {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.21";
            type yang:counter64;
            description
              "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  This object counts the same packets as
            
            
            ipIfStatsOutRequests, but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.23";
            type yang:counter32;
            description
              "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  In entities
            that do not act as IP routers, this counter will include
            only those datagrams that were Source-Routed via this
            entity, and the Source-Route processing was successful.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            forwarded datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutForwDatagrams {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.24";
            type yang:counter64;
            description
              "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  This object
            counts the same packets as ipIfStatsOutForwDatagrams, but
            allows for larger values.
            
            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
            
            
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutDiscards {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.25";
            type yang:counter32;
            description
              "The number of output IP datagrams for which no problem was
            encountered to prevent their transmission to their
            destination, but were discarded (e.g., for lack of
            buffer space).  Note that this counter would include
            datagrams counted in ipIfStatsOutForwDatagrams if any such
            datagrams met this (discretionary) discard criterion.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutFragReqds {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.26";
            type yang:counter32;
            description
              "The number of IP datagrams that would require fragmentation
            in order to be transmitted.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutFragOKs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.27";
            type yang:counter32;
            description
              "The number of IP datagrams that have been successfully
            fragmented.
            
            When tracking interface statistics, the counter of the
            
            
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutFragFails {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.28";
            type yang:counter32;
            description
              "The number of IP datagrams that have been discarded because
            they needed to be fragmented but could not be.  This
            includes IPv4 packets that have the DF bit set and IPv6
            packets that are being forwarded and exceed the outgoing
            link MTU.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for an unsuccessfully
            fragmented datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutFragCreates {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.29";
            type yang:counter32;
            description
              "The number of output datagram fragments that have been
            generated as a result of IP fragmentation.
            
            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutTransmits {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.30";
            type yang:counter32;
            description
              "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This includes
            datagrams generated locally and those forwarded by this
            entity.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutTransmits {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.31";
            type yang:counter64;
            description
              "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This object counts
            the same datagrams as ipIfStatsOutTransmits, but allows for
            larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.32";
            type yang:counter32;
            description
              "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  Octets from datagrams
            counted in ipIfStatsOutTransmits MUST be counted here.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.33";
            type yang:counter64;
            description
              "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  This objects counts the same
            octets as ipIfStatsOutOctets, but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.34";
            type yang:counter32;
            description
              "The number of IP multicast datagrams received.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.35";
            type yang:counter64;
            description
              "The number of IP multicast datagrams received.  This object
            counts the same datagrams as ipIfStatsInMcastPkts, but
            allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.36";
            type yang:counter32;
            description
              "The total number of octets received in IP multicast
            
            
            datagrams.  Octets from datagrams counted in
            ipIfStatsInMcastPkts MUST be counted here.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.37";
            type yang:counter64;
            description
              "The total number of octets received in IP multicast
            datagrams.  This object counts the same octets as
            ipIfStatsInMcastOctets, but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.38";
            type yang:counter32;
            description
              "The number of IP multicast datagrams transmitted.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutMcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.39";
            type yang:counter64;
            description
              "The number of IP multicast datagrams transmitted.  This
            object counts the same datagrams as ipIfStatsOutMcastPkts,
            but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.40";
            type yang:counter32;
            description
              "The total number of octets transmitted in IP multicast
            datagrams.  Octets from datagrams counted in
            ipIfStatsOutMcastPkts MUST be counted here.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutMcastOctets {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.41";
            type yang:counter64;
            description
              "The total number of octets transmitted in IP multicast
            datagrams.  This object counts the same octets as
            ipIfStatsOutMcastOctets, but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsInBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.42";
            type yang:counter32;
            description
              "The number of IP broadcast datagrams received.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCInBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.43";
            type yang:counter64;
            description
              "The number of IP broadcast datagrams received.  This object
            counts the same datagrams as ipIfStatsInBcastPkts, but
            allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsOutBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.44";
            type yang:counter32;
            description
              "The number of IP broadcast datagrams transmitted.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsHCOutBcastPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.45";
            type yang:counter64;
            description
              "The number of IP broadcast datagrams transmitted.  This
            object counts the same datagrams as ipIfStatsOutBcastPkts,
            but allows for larger values.
            
            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
            ipIfStatsDiscontinuityTime.";
          }

          leaf ipIfStatsDiscontinuityTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.46";
            type yang:timestamp;
            description
              "The value of sysUpTime on the most recent occasion at which
            
            
            any one or more of this entry's counters suffered a
            discontinuity.
            
            If no such discontinuities have occurred since the last re-
            initialization of the local management subsystem, then this
            object contains a zero value.";
          }

          leaf ipIfStatsRefreshRate {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.31.3.1.47";
            type uint32;
            units "milli-seconds";
            description
              "The minimum reasonable polling interval for this entry.
            This object provides an indication of the minimum amount of
            time required to update the counters in this entry.";
          }
        }  // list ipIfStatsEntry
      }  // container ipIfStatsTable

      container ipAddressPrefixTable {
        smiv2:oid "1.3.6.1.2.1.4.32";
        description
          "This table allows the user to determine the source of an IP
        address or set of IP addresses, and allows other tables to
        share the information via pointer rather than by copying.
        
        For example, when the node configures both a unicast and
        anycast address for a prefix, the ipAddressPrefix objects
        for those addresses will point to a single row in this
        table.
        
        This table primarily provides support for IPv6 prefixes, and
        several of the objects are less meaningful for IPv4.  The
        table continues to allow IPv4 addresses to allow future
        flexibility.  In order to promote a common configuration,
        this document includes suggestions for default values for
        IPv4 prefixes.  Each of these values may be overridden if an
        object is meaningful to the node.
        
        All prefixes used by this entity should be included in this
        table independent of how the entity learned the prefix.
        (This table isn't limited to prefixes learned from router
        
        
        advertisements.)";
        list ipAddressPrefixEntry {
          smiv2:oid "1.3.6.1.2.1.4.32.1";
          key "ipAddressPrefixIfIndex ipAddressPrefixType ipAddressPrefixPrefix ipAddressPrefixLength";
          description
            "An entry in the ipAddressPrefixTable.";
          leaf ipAddressPrefixIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.32.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface on
            which this prefix is configured.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipAddressPrefixType {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.32.1.2";
            type inet-address:InetAddressType;
            description
              "The address type of ipAddressPrefix.";
          }

          leaf ipAddressPrefixPrefix {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.32.1.3";
            type inet-address:InetAddress;
            description
              "The address prefix.  The address type of this object is
            specified in ipAddressPrefixType.  The length of this object
            is the standard length for objects of that type (4 or 16
            bytes).  Any bits after ipAddressPrefixLength must be zero.
            
            Implementors need to be aware that, if the size of
            ipAddressPrefixPrefix exceeds 114 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3.";
          }

          leaf ipAddressPrefixLength {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.32.1.4";
            type inet-address:InetAddressPrefixLength;
            description
              "The prefix length associated with this prefix.
            
            The value 0 has no special meaning for this object.  It
            simply refers to address '::/0'.";
          }

          leaf ipAddressPrefixOrigin {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.32.1.5";
            type IpAddressPrefixOriginTC;
            description
              "The origin of this prefix.";
          }

          leaf ipAddressPrefixOnLinkFlag {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.32.1.6";
            type boolean;
            description
              "This object has the value 'true(1)', if this prefix can be
            used for on-link determination; otherwise, the value is
            'false(2)'.
            
            The default for IPv4 prefixes is 'true(1)'.";
            reference
              "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462";

          }

          leaf ipAddressPrefixAutonomousFlag {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.32.1.7";
            type boolean;
            description
              "Autonomous address configuration flag.  When true(1),
            indicates that this prefix can be used for autonomous
            address configuration (i.e., can be used to form a local
            interface address).  If false(2), it is not used to auto-
            configure a local interface address.
            
            The default for IPv4 prefixes is 'false(2)'.";
            reference
              "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462";

          }

          leaf ipAddressPrefixAdvPreferredLifetime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.32.1.8";
            type uint32;
            units "seconds";
            description
              "The remaining length of time, in seconds, that this prefix
            will continue to be preferred, i.e., time until deprecation.
            
            A value of 4,294,967,295 represents infinity.
            
            The address generated from a deprecated prefix should no
            longer be used as a source address in new communications,
            but packets received on such an interface are processed as
            expected.
            
            The default for IPv4 prefixes is 4,294,967,295 (infinity).";
            reference
              "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462";

          }

          leaf ipAddressPrefixAdvValidLifetime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.32.1.9";
            type uint32;
            units "seconds";
            description
              "The remaining length of time, in seconds, that this prefix
            will continue to be valid, i.e., time until invalidation.  A
            value of 4,294,967,295 represents infinity.
            
            The address generated from an invalidated prefix should not
            appear as the destination or source address of a packet.
            
            
            The default for IPv4 prefixes is 4,294,967,295 (infinity).";
            reference
              "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462";

          }
        }  // list ipAddressPrefixEntry
      }  // container ipAddressPrefixTable

      container ipAddressTable {
        smiv2:oid "1.3.6.1.2.1.4.34";
        description
          "This table contains addressing information relevant to the
        entity's interfaces.
        
        This table does not contain multicast address information.
        Tables for such information should be contained in multicast
        specific MIBs, such as RFC 3019.
        
        While this table is writable, the user will note that
        several objects, such as ipAddressOrigin, are not.  The
        intention in allowing a user to write to this table is to
        allow them to add or remove any entry that isn't
        
        
        permanent.  The user should be allowed to modify objects
        and entries when that would not cause inconsistencies
        within the table.  Allowing write access to objects, such
        as ipAddressOrigin, could allow a user to insert an entry
        and then label it incorrectly.
        
        Note well: When including IPv6 link-local addresses in this
        table, the entry must use an InetAddressType of 'ipv6z' in
        order to differentiate between the possible interfaces.";
        list ipAddressEntry {
          smiv2:oid "1.3.6.1.2.1.4.34.1";
          key "ipAddressAddrType ipAddressAddr";
          description
            "An address mapping for a particular interface.";
          leaf ipAddressAddrType {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.34.1.1";
            type inet-address:InetAddressType;
            description
              "The address type of ipAddressAddr.";
          }

          leaf ipAddressAddr {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.34.1.2";
            type inet-address:InetAddress;
            description
              "The IP address to which this entry's addressing information
            
            
            pertains.  The address type of this object is specified in
            ipAddressAddrType.
            
            Implementors need to be aware that if the size of
            ipAddressAddr exceeds 116 octets, then OIDS of instances of
            columns in this row will have more than 128 sub-identifiers
            and cannot be accessed using SNMPv1, SNMPv2c, or SNMPv3.";
          }

          leaf ipAddressIfIndex {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.34.1.3";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipAddressType {
            smiv2:defval "unicast";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.34.1.4";
            type enumeration {
              enum "unicast" {
                value 1;
              }
              enum "anycast" {
                value 2;
              }
              enum "broadcast" {
                value 3;
              }
            }
            description
              "The type of address.  broadcast(3) is not a valid value for
            IPv6 addresses (RFC 3513).";
          }

          leaf ipAddressPrefix {
            smiv2:defval "zeroDotZero";
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.34.1.5";
            type snmpv2-tc:RowPointer;
            description
              "A pointer to the row in the prefix table to which this
            address belongs.  May be { 0 0 } if there is no such row.";
          }

          leaf ipAddressOrigin {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.34.1.6";
            type IpAddressOriginTC;
            description
              "The origin of the address.";
          }

          leaf ipAddressStatus {
            smiv2:defval "preferred";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.34.1.7";
            type IpAddressStatusTC;
            description
              "The status of the address, describing if the address can be
            used for communication.
            
            In the absence of other information, an IPv4 address is
            always preferred(1).";
          }

          leaf ipAddressCreated {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.34.1.8";
            type yang:timestamp;
            description
              "The value of sysUpTime at the time this entry was created.
            If this entry was created prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value.";
          }

          leaf ipAddressLastChanged {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.34.1.9";
            type yang:timestamp;
            description
              "The value of sysUpTime at the time this entry was last
            updated.  If this entry was updated prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value.";
          }

          leaf ipAddressRowStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.34.1.10";
            type snmpv2-tc:RowStatus;
            description
              "The status of this conceptual row.
            
            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row
            
            
            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified.
            
            A conceptual row can not be made active until the
            ipAddressIfIndex has been set to a valid index.";
          }

          leaf ipAddressStorageType {
            smiv2:defval "volatile";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.34.1.11";
            type snmpv2-tc:StorageType;
            description
              "The storage type for this conceptual row.  If this object
            has a value of 'permanent', then no other objects are
            required to be able to be modified.";
          }
        }  // list ipAddressEntry
      }  // container ipAddressTable

      container ipNetToPhysicalTable {
        smiv2:oid "1.3.6.1.2.1.4.35";
        description
          "The IP Address Translation table used for mapping from IP
        addresses to physical addresses.
        
        The Address Translation tables contain the IP address to
        'physical' address equivalences.  Some interfaces do not use
        translation tables for determining address equivalences
        (e.g., DDN-X.25 has an algorithmic method); if all
        interfaces are of this type, then the Address Translation
        table is empty, i.e., has zero entries.
        
        While many protocols may be used to populate this table, ARP
        and Neighbor Discovery are the most likely
        options.";
        reference
          "RFC 826 and RFC 2461";

        list ipNetToPhysicalEntry {
          smiv2:oid "1.3.6.1.2.1.4.35.1";
          key "ipNetToPhysicalIfIndex ipNetToPhysicalNetAddressType ipNetToPhysicalNetAddress";
          description
            "Each entry contains one IP address to `physical' address
          equivalence.";
          leaf ipNetToPhysicalIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.35.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipNetToPhysicalNetAddressType {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.35.1.2";
            type inet-address:InetAddressType;
            description
              "The type of ipNetToPhysicalNetAddress.";
          }

          leaf ipNetToPhysicalNetAddress {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.35.1.3";
            type inet-address:InetAddress;
            description
              "The IP Address corresponding to the media-dependent
            `physical' address.  The address type of this object is
            specified in ipNetToPhysicalAddressType.
            
            Implementors need to be aware that if the size of
            
            
            ipNetToPhysicalNetAddress exceeds 115 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3.";
          }

          leaf ipNetToPhysicalPhysAddress {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.35.1.4";
            type yang:phys-address {
              length "0..65535";
            }
            description
              "The media-dependent `physical' address.
            
            As the entries in this table are typically not persistent
            when this object is written the entity SHOULD NOT save the
            change to non-volatile storage.";
          }

          leaf ipNetToPhysicalLastUpdated {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.35.1.5";
            type yang:timestamp;
            description
              "The value of sysUpTime at the time this entry was last
            updated.  If this entry was updated prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value.";
          }

          leaf ipNetToPhysicalType {
            smiv2:defval "static";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.35.1.6";
            type enumeration {
              enum "other" {
                value 1;
              }
              enum "invalid" {
                value 2;
              }
              enum "dynamic" {
                value 3;
              }
              enum "static" {
                value 4;
              }
              enum "local" {
                value 5;
              }
            }
            description
              "The type of mapping.
            
            Setting this object to the value invalid(2) has the effect
            of invalidating the corresponding entry in the
            ipNetToPhysicalTable.  That is, it effectively dis-
            associates the interface identified with said entry from the
            mapping identified with said entry.  It is an
            implementation-specific matter as to whether the agent
            
            
            removes an invalidated entry from the table.  Accordingly,
            management stations must be prepared to receive tabular
            information from agents that corresponds to entries not
            currently in use.  Proper interpretation of such entries
            requires examination of the relevant ipNetToPhysicalType
            object.
            
            The 'dynamic(3)' type indicates that the IP address to
            physical addresses mapping has been dynamically resolved
            using e.g., IPv4 ARP or the IPv6 Neighbor Discovery
            protocol.
            
            The 'static(4)' type indicates that the mapping has been
            statically configured.  Both of these refer to entries that
            provide mappings for other entities addresses.
            
            The 'local(5)' type indicates that the mapping is provided
            for an entity's own interface address.
            
            As the entries in this table are typically not persistent
            when this object is written the entity SHOULD NOT save the
            change to non-volatile storage.";
          }

          leaf ipNetToPhysicalState {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.35.1.7";
            type enumeration {
              enum "reachable" {
                value 1;
              }
              enum "stale" {
                value 2;
              }
              enum "delay" {
                value 3;
              }
              enum "probe" {
                value 4;
              }
              enum "invalid" {
                value 5;
              }
              enum "unknown" {
                value 6;
              }
              enum "incomplete" {
                value 7;
              }
            }
            description
              "The Neighbor Unreachability Detection state for the
            interface when the address mapping in this entry is used.
            If Neighbor Unreachability Detection is not in use (e.g. for
            IPv4), this object is always unknown(6).";
            reference
              "RFC 2461";

          }

          leaf ipNetToPhysicalRowStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.35.1.8";
            type snmpv2-tc:RowStatus;
            description
              "The status of this conceptual row.
            
            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row
            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified.
            
            A conceptual row can not be made active until the
            ipNetToPhysicalPhysAddress object has been set.
            
            Note that if the ipNetToPhysicalType is set to 'invalid',
            the managed node may delete the entry independent of the
            state of this object.";
          }
        }  // list ipNetToPhysicalEntry
      }  // container ipNetToPhysicalTable

      container ipv6ScopeZoneIndexTable {
        smiv2:oid "1.3.6.1.2.1.4.36";
        description
          "The table used to describe IPv6 unicast and multicast scope
        zones.
        
        For those objects that have names rather than numbers, the
        names were chosen to coincide with the names used in the
        IPv6 address architecture document. ";
        reference
          "Section 2.7 of RFC 4291";

        list ipv6ScopeZoneIndexEntry {
          smiv2:oid "1.3.6.1.2.1.4.36.1";
          key "ipv6ScopeZoneIndexIfIndex";
          description
            "Each entry contains the list of scope identifiers on a given
          interface.";
          leaf ipv6ScopeZoneIndexIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.36.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface to
            which these scopes belong.  The interface identified by a
            particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipv6ScopeZoneIndexLinkLocal {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.2";
            type inet-address:InetZoneIndex;
            description
              "The zone index for the link-local scope on this interface.";
          }

          leaf ipv6ScopeZoneIndex3 {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.3";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope 3 on this interface.";
          }

          leaf ipv6ScopeZoneIndexAdminLocal {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.4";
            type inet-address:InetZoneIndex;
            description
              "The zone index for the admin-local scope on this interface.";
          }

          leaf ipv6ScopeZoneIndexSiteLocal {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.5";
            type inet-address:InetZoneIndex;
            description
              "The zone index for the site-local scope on this interface.";
          }

          leaf ipv6ScopeZoneIndex6 {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.6";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope 6 on this interface.";
          }

          leaf ipv6ScopeZoneIndex7 {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.7";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope 7 on this interface.";
          }

          leaf ipv6ScopeZoneIndexOrganizationLocal {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.8";
            type inet-address:InetZoneIndex;
            description
              "The zone index for the organization-local scope on this
            interface.";
          }

          leaf ipv6ScopeZoneIndex9 {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.9";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope 9 on this interface.";
          }

          leaf ipv6ScopeZoneIndexA {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.10";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope A on this interface.";
          }

          leaf ipv6ScopeZoneIndexB {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.11";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope B on this interface.";
          }

          leaf ipv6ScopeZoneIndexC {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.12";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope C on this interface.";
          }

          leaf ipv6ScopeZoneIndexD {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.36.1.13";
            type inet-address:InetZoneIndex;
            description
              "The zone index for scope D on this interface.";
          }
        }  // list ipv6ScopeZoneIndexEntry
      }  // container ipv6ScopeZoneIndexTable

      container ipDefaultRouterTable {
        smiv2:oid "1.3.6.1.2.1.4.37";
        description
          "The table used to describe the default routers known to this
        
        
        entity.";
        list ipDefaultRouterEntry {
          smiv2:oid "1.3.6.1.2.1.4.37.1";
          key "ipDefaultRouterAddressType ipDefaultRouterAddress ipDefaultRouterIfIndex";
          description
            "Each entry contains information about a default router known
          to this entity.";
          leaf ipDefaultRouterAddressType {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.37.1.1";
            type inet-address:InetAddressType;
            description
              "The address type for this row.";
          }

          leaf ipDefaultRouterAddress {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.37.1.2";
            type inet-address:InetAddress;
            description
              "The IP address of the default router represented by this
            row.  The address type of this object is specified in
            ipDefaultRouterAddressType.
            
            Implementers need to be aware that if the size of
            ipDefaultRouterAddress exceeds 115 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3.";
          }

          leaf ipDefaultRouterIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.37.1.3";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface by
            which the router can be reached.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipDefaultRouterLifetime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.37.1.4";
            type uint32 {
              range "0..65535";
            }
            units "seconds";
            description
              "The remaining length of time, in seconds, that this router
            will continue to be useful as a default router.  A value of
            zero indicates that it is no longer useful as a default
            router.  It is left to the implementer of the MIB as to
            whether a router with a lifetime of zero is removed from the
            list.
            
            For IPv6, this value should be extracted from the router
            advertisement messages.";
            reference
              "For IPv6 RFC 2462 sections 4.2 and 6.3.4";

          }

          leaf ipDefaultRouterPreference {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.4.37.1.5";
            type enumeration {
              enum "reserved" {
                value -2;
              }
              enum "low" {
                value -1;
              }
              enum "medium" {
                value 0;
              }
              enum "high" {
                value 1;
              }
            }
            description
              "An indication of preference given to this router as a
            default router as described in he Default Router
            Preferences document.  Treating the value as a
            2 bit signed integer allows for simple arithmetic
            comparisons.
            
            For IPv4 routers or IPv6 routers that are not using the
            updated router advertisement format, this object is set to
            medium (0).";
            reference
              "RFC 4291, section 2.1";

          }
        }  // list ipDefaultRouterEntry
      }  // container ipDefaultRouterTable

      container ipv6RouterAdvertTable {
        smiv2:oid "1.3.6.1.2.1.4.39";
        description
          "The table containing information used to construct router
        advertisements.";
        list ipv6RouterAdvertEntry {
          smiv2:oid "1.3.6.1.2.1.4.39.1";
          key "ipv6RouterAdvertIfIndex";
          description
            "An entry containing information used to construct router
          advertisements.
          
          Information in this table is persistent, and when this
          object is written, the entity SHOULD save the change to
          non-volatile storage.";
          leaf ipv6RouterAdvertIfIndex {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.4.39.1.1";
            type if-mib:InterfaceIndex;
            description
              "The index value that uniquely identifies the interface on
            which router advertisements constructed with this
            information will be transmitted.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex.";
          }

          leaf ipv6RouterAdvertSendAdverts {
            smiv2:defval "false";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.2";
            type boolean;
            description
              "A flag indicating whether the router sends periodic
            router advertisements and responds to router solicitations
            on this interface.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertMaxInterval {
            smiv2:defval "600";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.3";
            type uint32 {
              range "4..1800";
            }
            units "seconds";
            description
              "The maximum time allowed between sending unsolicited router
            
            
            advertisements from this interface.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertMinInterval {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.4";
            type uint32 {
              range "3..1350";
            }
            units "seconds";
            description
              "The minimum time allowed between sending unsolicited router
            advertisements from this interface.
            
            The default is 0.33 * ipv6RouterAdvertMaxInterval, however,
            in the case of a low value for ipv6RouterAdvertMaxInterval,
            the minimum value for this object is restricted to 3.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertManagedFlag {
            smiv2:defval "false";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.5";
            type boolean;
            description
              "The true/false value to be placed into the 'managed address
            configuration' flag field in router advertisements sent from
            this interface.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertOtherConfigFlag {
            smiv2:defval "false";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.6";
            type boolean;
            description
              "The true/false value to be placed into the 'other stateful
            configuration' flag field in router advertisements sent from
            this interface.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertLinkMTU {
            smiv2:defval "0";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.7";
            type uint32;
            description
              "The value to be placed in MTU options sent by the router on
            this interface.
            
            A value of zero indicates that no MTU options are sent.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertReachableTime {
            smiv2:defval "0";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.8";
            type uint32 {
              range "0..3600000";
            }
            units "milliseconds";
            description
              "The value to be placed in the reachable time field in router
            advertisement messages sent from this interface.
            
            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for reachable
            time.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertRetransmitTime {
            smiv2:defval "0";
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.9";
            type uint32;
            units "milliseconds";
            description
              "The value to be placed in the retransmit timer field in
            router advertisements sent from this interface.
            
            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for retrans
            time.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertCurHopLimit {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.10";
            type uint32 {
              range "0..255";
            }
            description
              "The default value to be placed in the current hop limit
            field in router advertisements sent from this interface.
            
            
            The value should be set to the current diameter of the
            Internet.
            
            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for curHopLimit.
            
            The default should be set to the value specified in the IANA
            web pages (www.iana.org) at the time of implementation.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertDefaultLifetime {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.11";
            type uint32 {
              range "0|4..9000";
            }
            units "seconds";
            description
              "The value to be placed in the router lifetime field of
            router advertisements sent from this interface.  This value
            MUST be either 0 or between ipv6RouterAdvertMaxInterval and
            9000 seconds.
            
            A value of zero indicates that the router is not to be used
            as a default router.
            
            The default is 3 * ipv6RouterAdvertMaxInterval.";
            reference
              "RFC 2461 Section 6.2.1";

          }

          leaf ipv6RouterAdvertRowStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.4.39.1.12";
            type snmpv2-tc:RowStatus;
            description
              "The status of this conceptual row.
            
            As all objects in this conceptual row have default values, a
            row can be created and made active by setting this object
            appropriately.
            
            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row
            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified.";
          }
        }  // list ipv6RouterAdvertEntry
      }  // container ipv6RouterAdvertTable

      container icmpStatsTable {
        smiv2:oid "1.3.6.1.2.1.5.29";
        description
          "The table of generic system-wide ICMP counters.";
        list icmpStatsEntry {
          smiv2:oid "1.3.6.1.2.1.5.29.1";
          key "icmpStatsIPVersion";
          description
            "A conceptual row in the icmpStatsTable.";
          leaf icmpStatsIPVersion {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.5.29.1.1";
            type inet:ip-version;
            description
              "The IP version of the statistics.";
          }

          leaf icmpStatsInMsgs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.29.1.2";
            type yang:counter32;
            description
              "The total number of ICMP messages that the entity received.
            Note that this counter includes all those counted by
            icmpStatsInErrors.";
          }

          leaf icmpStatsInErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.29.1.3";
            type yang:counter32;
            description
              "The number of ICMP messages that the entity received but
            determined as having ICMP-specific errors (bad ICMP
            checksums, bad length, etc.).";
          }

          leaf icmpStatsOutMsgs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.29.1.4";
            type yang:counter32;
            description
              "The total number of ICMP messages that the entity attempted
            to send.  Note that this counter includes all those counted
            by icmpStatsOutErrors.";
          }

          leaf icmpStatsOutErrors {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.29.1.5";
            type yang:counter32;
            description
              "The number of ICMP messages that this entity did not send
            due to problems discovered within ICMP, such as a lack of
            buffers.  This value should not include errors discovered
            outside the ICMP layer, such as the inability of IP to route
            the resultant datagram.  In some implementations, there may
            be no types of error that contribute to this counter's
            value.";
          }
        }  // list icmpStatsEntry
      }  // container icmpStatsTable

      container icmpMsgStatsTable {
        smiv2:oid "1.3.6.1.2.1.5.30";
        description
          "The table of system-wide per-version, per-message type ICMP
        counters.";
        list icmpMsgStatsEntry {
          smiv2:oid "1.3.6.1.2.1.5.30.1";
          key "icmpMsgStatsIPVersion icmpMsgStatsType";
          description
            "A conceptual row in the icmpMsgStatsTable.
          
          The system should track each ICMP type value, even if that
          ICMP type is not supported by the system.  However, a
          given row need not be instantiated unless a message of that
          type has been processed, i.e., the row for
          icmpMsgStatsType=X MAY be instantiated before but MUST be
          instantiated after the first message with Type=X is
          received or transmitted.  After receiving or transmitting
          any succeeding messages with Type=X, the relevant counter
          must be incremented.";
          leaf icmpMsgStatsIPVersion {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.5.30.1.1";
            type inet:ip-version;
            description
              "The IP version of the statistics.";
          }

          leaf icmpMsgStatsType {
            smiv2:max-access "not-accessible";
            smiv2:oid "1.3.6.1.2.1.5.30.1.2";
            type int32 {
              range "0..255";
            }
            description
              "The ICMP type field of the message type being counted by
            this row.
            
            Note that ICMP message types are scoped by the address type
            in use.";
            reference
              "http://www.iana.org/assignments/icmp-parameters and
              http://www.iana.org/assignments/icmpv6-parameters";

          }

          leaf icmpMsgStatsInPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.30.1.3";
            type yang:counter32;
            description
              "The number of input packets for this AF and type.";
          }

          leaf icmpMsgStatsOutPkts {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.5.30.1.4";
            type yang:counter32;
            description
              "The number of output packets for this AF and type.";
          }
        }  // list icmpMsgStatsEntry
      }  // container icmpMsgStatsTable
    }  // container IP-MIB
  }  // module IP-MIB