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Network Working Group                                        D. HaskinRequest for Comments: 2465                                   S. OnishiCategory: Standards Track                           Bay Networks, Inc.                                                         December 1998Management Information Base for IP Version 6:Textual Conventions and General GroupStatus of this Memo   This document specifies an Internet standards track protocol for the   Internet community, and requests discussion and suggestions for   improvements.  Please refer to the current edition of the "Internet   Official Protocol Standards" (STD 1) for the standardization state   and status of this protocol.  Distribution of this memo is unlimited.Copyright Notice   Copyright (C) The Internet Society (1998).  All Rights Reserved.Abstract   This document is one in the series of documents that provide MIB   definitions for for IP Version 6.  Specifically, the IPv6 MIB textual   conventions as well as the IPv6 MIB General group is defined in this   document.   This memo defines a portion of the Management Information Base (MIB)   for use with network management protocols in the IPv6-based   internets.   This document specifies a MIB module in a manner that is both   compliant to the SNMPv2 SMI, and semantically identical to the peer   SNMPv1 definitions.Table of Contents1.  The SNMPv2 Network Management Framework .............21.1   Object Definitions ................................22.  Overview ............................................23.  IPv6 Address Representation .........................34.  Definition of Textual Conventions ...................45.  The IPv6 General Group ..............................56.  Acknowledgments .....................................367.  References ..........................................368.  Security Considerations .............................379.  Authors' Addresses...................................37Haskin & Onishi             Standards Track                     [Page 1]

RFC 2465                IPv6 MIB: General Group            December 199810. Full Copyright Statement.............................381.  The SNMPv2 Network Management Framework   The SNMPv2 Network Management Framework presently consists of three   major components.  They are:   o    the SMI, described inRFC 1902 [1] - the mechanisms used        for describing and naming objects for the purpose of management.   o    the MIB-II, described inRFC 1213/STD 17 [3] - the core        set of managed objects for the Internet suite of protocols.   oRFC 1157/STD 15 [4] andRFC 1905 [5] which define two versions        of the protocol used for network access to managed objects.   The Framework permits new objects to be defined for the purpose of   experimentation and evaluation.1.1.  Object Definitions   Managed objects are accessed via a virtual information store, termed   the Management Information Base or MIB.  Objects in the MIB are   defined using the subset of Abstract Syntax Notation One (ASN.1)   defined in the SMI.  In particular, each object type is named by an   OBJECT IDENTIFIER, an administratively assigned name.  The object   type together with an object instance serves to uniquely identify a   specific instantiation of the object.  For human convenience, we   often use a textual string, termed the descriptor, to refer to the   object type.2.  Overview   This document is the first in the series of documents that define   various MIB object groups for IPv6. These groups are the basic unit   of conformance: if the semantics of a group is applicable to an   implementation, then it must implement all objects in that group.   For example, an implementation must implement the TCP group if and   only if it implements the TCP over IPv6 protocol.  At minimum,   implementations must implement the IPv6 General group defined in this   document as well as the ICMPv6 group [9].Haskin & Onishi             Standards Track                     [Page 2]

RFC 2465                IPv6 MIB: General Group            December 1998   This document defines the IPv6 MIB textual conventions as well as the   IPv6 General group which provides for the basic management of IPv6   entities and serve as the foundation for other IPv6 MIB definitions.   The IPv6 General group consists of 6 tables:       - ipv6IfTable            The IPv6 Interfaces table contains information on the            entity's IPv6 interfaces.       - ipv6IfStatsTable            This table contains information on the traffic statistics of            the entity's IPv6 interfaces.       - ipv6AddrPrefixTable            The IPv6 Address Prefix table contains information on            Address Prefixes that are associated with the entity's IPv6            interfaces.       - ipv6AddrTable            This table contains the addressing information relevant to            the entity's IPv6 interfaces.       - ipv6RouteTable            The IPv6 routing table contains an entry for each valid IPv6            unicast route that can be used for packet forwarding            determination.       - ipv6NetToMediaTable            The IPv6 address translation table contain the IPv6 Address            to `physical' address equivalencies.3.  IPv6 Address Representation   The IPv6 MIB defined in this memo uses an OCTET STRING of length 16   to represent 128-bit IPv6 address in network byte- order.  This   approach allows to implement IPv6 MIB without requiring any changes   to the SNMPv2 SMI and compliant SNMP implementations.Haskin & Onishi             Standards Track                     [Page 3]

RFC 2465                IPv6 MIB: General Group            December 19984.  Definition of Textual Conventions        IPV6-TC DEFINITIONS ::= BEGIN        IMPORTS             Integer32                FROM SNMPv2-SMI             TEXTUAL-CONVENTION       FROM SNMPv2-TC;        -- definition of textual conventions        Ipv6Address ::= TEXTUAL-CONVENTION             DISPLAY-HINT "2x:"             STATUS       current             DESCRIPTION               "This data type is used to model IPv6 addresses.                This is a binary string of 16 octets in network                byte-order."             SYNTAX       OCTET STRING (SIZE (16))        Ipv6AddressPrefix ::= TEXTUAL-CONVENTION             DISPLAY-HINT "2x:"             STATUS       current             DESCRIPTION               "This data type is used to model IPv6 address               prefixes. This is a binary string of up to 16               octets in network byte-order."             SYNTAX       OCTET STRING (SIZE (0..16))        Ipv6AddressIfIdentifier ::= TEXTUAL-CONVENTION             DISPLAY-HINT "2x:"             STATUS       current             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."             SYNTAX      OCTET STRING (SIZE (0..8))        Ipv6IfIndex ::= TEXTUAL-CONVENTION             DISPLAY-HINT "d"             STATUS       current             DESCRIPTION               "A unique value, greater than zero for each               internetwork-layer interface in the managed               system. It is recommended that values are assigned               contiguously starting from 1. The value for each               internetwork-layer interface must remain constant               at least from one re-initialization of the entity's               network management system to the nextHaskin & Onishi             Standards Track                     [Page 4]

RFC 2465                IPv6 MIB: General Group            December 1998               re-initialization."             SYNTAX       Integer32 (1..2147483647)        Ipv6IfIndexOrZero ::= TEXTUAL-CONVENTION             DISPLAY-HINT "d"             STATUS       current             DESCRIPTION                 "This textual convention is an extension of the                 Ipv6IfIndex convention.  The latter defines                 a greater than zero value used to identify an IPv6                 interface in the managed system.  This extension                 permits the additional value of zero.  The value                 zero is object-specific and must therefore be                 defined as part of the description of any object                 which uses this syntax.  Examples of the usage of                 zero might include situations where interface was                 unknown, or when none or all interfaces need to be                 referenced."             SYNTAX       Integer32 (0..2147483647)        END5.  The IPv6 General Group         IPV6-MIB DEFINITIONS ::= BEGIN         IMPORTS             MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,             mib-2, Counter32, Unsigned32, Integer32,             Gauge32                               FROM SNMPv2-SMI             DisplayString, PhysAddress, TruthValue, TimeStamp,             VariablePointer, RowPointer           FROM SNMPv2-TC             MODULE-COMPLIANCE, OBJECT-GROUP,             NOTIFICATION-GROUP                    FROM SNMPv2-CONF             Ipv6IfIndex, Ipv6Address, Ipv6AddressPrefix,             Ipv6AddressIfIdentifier,             Ipv6IfIndexOrZero                     FROM IPV6-TC;         ipv6MIB MODULE-IDENTITY             LAST-UPDATED "9802052155Z"             ORGANIZATION "IETF IPv6 Working Group"             CONTACT-INFO               "           Dimitry Haskin                   Postal: Bay Networks, Inc.                           660 Techology Park Drive.                           Billerica, MA  01821Haskin & Onishi             Standards Track                     [Page 5]

RFC 2465                IPv6 MIB: General Group            December 1998                           US                      Tel: +1-978-916-8124                   E-mail: dhaskin@baynetworks.com                           Steve Onishi                   Postal: Bay Networks, Inc.                           3 Federal Street                           Billerica, MA 01821                           US                      Tel: +1-978-916-3816                   E-mail: sonishi@baynetworks.com"             DESCRIPTION               "The MIB module for entities implementing the IPv6                protocol."             ::= { mib-2 55 }         -- the IPv6 general group         ipv6MIBObjects OBJECT IDENTIFIER   ::= { ipv6MIB 1 }         ipv6Forwarding OBJECT-TYPE             SYNTAX      INTEGER {                          forwarding(1),    -- acting as a router                                            -- NOT acting as                          notForwarding(2)  -- a router                         }              MAX-ACCESS read-write              STATUS     current              DESCRIPTION                "The indication of whether this entity is acting                as an IPv6 router 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).                Note that for some managed nodes, this object may                take on only a subset of the values possible.                Accordingly, it is appropriate for an agent to                return a `wrongValue' response if a management                station attempts to change this object to an                inappropriate value."Haskin & Onishi             Standards Track                     [Page 6]

RFC 2465                IPv6 MIB: General Group            December 1998              ::= { ipv6MIBObjects 1 }         ipv6DefaultHopLimit OBJECT-TYPE             SYNTAX      INTEGER(0..255)             MAX-ACCESS  read-write              STATUS     current             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."             DEFVAL  { 64 }             ::= { ipv6MIBObjects 2 }        ipv6Interfaces OBJECT-TYPE             SYNTAX      Unsigned32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The number of IPv6 interfaces (regardless of                their current state) present on this system."             ::= { ipv6MIBObjects 3 }        ipv6IfTableLastChange OBJECT-TYPE             SYNTAX      TimeStamp             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The value of sysUpTime at the time of the last               insertion or removal of an entry in the               ipv6IfTable. If the number of entries has been               unchanged since the last re-initialization of               the local network management subsystem, then this               object contains a zero value."             ::= { ipv6MIBObjects 4 }        -- the IPv6 Interfaces table        ipv6IfTable OBJECT-TYPE             SYNTAX     SEQUENCE OF Ipv6IfEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "The IPv6 Interfaces table contains information               on the entity's internetwork-layer interfaces.               An IPv6 interface constitutes a logical network               layer attachment to the layer immediately belowHaskin & Onishi             Standards Track                     [Page 7]

RFC 2465                IPv6 MIB: General Group            December 1998               IPv6 including internet layer 'tunnels', such as               tunnels over IPv4 or IPv6 itself."             ::= { ipv6MIBObjects 5 }         ipv6IfEntry OBJECT-TYPE             SYNTAX     Ipv6IfEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "An interface entry containing objects                about a particular IPv6 interface."             INDEX   { ipv6IfIndex }             ::= { ipv6IfTable 1 }         Ipv6IfEntry ::= SEQUENCE {                 ipv6IfIndex              Ipv6IfIndex,                 ipv6IfDescr              DisplayString,                 ipv6IfLowerLayer         VariablePointer,                 ipv6IfEffectiveMtu       Unsigned32,                 ipv6IfReasmMaxSize       Unsigned32,                 ipv6IfIdentifier         Ipv6AddressIfIdentifier,                 ipv6IfIdentifierLength   INTEGER,                 ipv6IfPhysicalAddress    PhysAddress,                 ipv6IfAdminStatus        INTEGER,                 ipv6IfOperStatus         INTEGER,                 ipv6IfLastChange         TimeStamp             }         ipv6IfIndex OBJECT-TYPE             SYNTAX     Ipv6IfIndex             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "A unique non-zero value identifying                the particular IPv6 interface."             ::= { ipv6IfEntry 1 }         ipv6IfDescr OBJECT-TYPE             SYNTAX     DisplayString             MAX-ACCESS read-write             STATUS     current             DESCRIPTION               "A textual string containing information about the               interface.  This string may be set by the network               management system."             ::= { ipv6IfEntry 2 }         ipv6IfLowerLayer OBJECT-TYPEHaskin & Onishi             Standards Track                     [Page 8]

RFC 2465                IPv6 MIB: General Group            December 1998            SYNTAX      VariablePointer            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "This object identifies the protocol layer over               which this network interface operates.  If this               network interface operates over the data-link               layer, then the value of this object refers to an               instance of ifIndex [6]. If this network interface               operates over an IPv4 interface, the value of this               object refers to an instance of ipAdEntAddr [3].               If this network interface operates over another               IPv6 interface, the value of this object refers to               an instance of ipv6IfIndex.  If this network               interface is not currently operating over an active               protocol layer, then the value of this object               should be set to the OBJECT ID { 0 0 }."            ::= { ipv6IfEntry 3 }         ipv6IfEffectiveMtu OBJECT-TYPE            SYNTAX      Unsigned32            UNITS       "octets"            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "The size of the largest IPv6 packet which can be              sent/received on the interface, specified in              octets."         ::= { ipv6IfEntry 4 }         ipv6IfReasmMaxSize OBJECT-TYPE            SYNTAX      Unsigned32 (0..65535)            UNITS       "octets"            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "The size of the largest IPv6 datagram which this              entity can re-assemble from incoming IPv6 fragmented              datagrams received on this interface."         ::= { ipv6IfEntry 5 }         ipv6IfIdentifier OBJECT-TYPE             SYNTAX      Ipv6AddressIfIdentifier             MAX-ACCESS  read-write             STATUS      current             DESCRIPTION                "The Interface Identifier for this interface thatHaskin & Onishi             Standards Track                     [Page 9]

RFC 2465                IPv6 MIB: General Group            December 1998                is (at least) unique on the link this interface is                attached to. The Interface Identifier is combined                with an address prefix to form an interface address.                By default, the Interface Identifier is autoconfigured                according to the rules of the link type this                interface is attached to."             ::= { ipv6IfEntry 6 }         ipv6IfIdentifierLength OBJECT-TYPE             SYNTAX      INTEGER (0..64)             UNITS       "bits"             MAX-ACCESS  read-write             STATUS      current             DESCRIPTION               "The length of the Interface Identifier in bits."             ::= { ipv6IfEntry 7 }         ipv6IfPhysicalAddress OBJECT-TYPE             SYNTAX      PhysAddress             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The interface's physical address. For example, for               an IPv6 interface attached to an 802.x link, this               object normally contains a MAC address. Note that               in some cases this address may differ from the               address of the interface's protocol sub-layer.  The               interface's media-specific MIB must define the bit               and byte ordering and the format of the value of               this object. For interfaces which do not have such               an address (e.g., a serial line), this object should               contain an octet string of zero length."             ::= { ipv6IfEntry 8 }        ipv6IfAdminStatus OBJECT-TYPE            SYNTAX  INTEGER {                     up(1),       -- ready to pass packets                     down(2)                    }            MAX-ACCESS  read-write            STATUS      current            DESCRIPTION              "The desired state of the interface.  When a managed              system initializes,  all IPv6 interfaces start with              ipv6IfAdminStatus in the down(2) state.  As a result              of either explicit management action or per              configuration information retained by the managedHaskin & Onishi             Standards Track                    [Page 10]

RFC 2465                IPv6 MIB: General Group            December 1998              system,  ipv6IfAdminStatus is then changed to              the up(1) state (or remains in the down(2) state)."            ::= { ipv6IfEntry 9 }        ipv6IfOperStatus OBJECT-TYPE            SYNTAX  INTEGER {                     up(1),             -- ready to pass packets                     down(2),                     noIfIdentifier(3), -- no interface identifier                                        -- status can not be                                        -- determined for some                     unknown(4),        -- reason                                        -- some component is                     notPresent(5)      -- missing                    }            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "The current operational state of the interface.              The noIfIdentifier(3) state indicates that no valid              Interface Identifier is assigned to the interface.              This state usually indicates that the link-local              interface address failed Duplicate Address Detection.              If ipv6IfAdminStatus is down(2) then ipv6IfOperStatus              should be down(2).  If ipv6IfAdminStatus is changed              to up(1) then ipv6IfOperStatus should change to up(1)              if the interface is ready to transmit and receive              network traffic; it should remain in the down(2) or              noIfIdentifier(3) state if and only if there is a              fault that prevents it from going to the up(1) state;              it should remain in the notPresent(5) state if              the interface has missing (typically, lower layer)              components."            ::= { ipv6IfEntry 10 }        ipv6IfLastChange OBJECT-TYPE            SYNTAX      TimeStamp            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION                "The value of sysUpTime at the time the interface                entered its current operational state.  If the                current state was entered prior to the last                re-initialization of the local network managementHaskin & Onishi             Standards Track                    [Page 11]

RFC 2465                IPv6 MIB: General Group            December 1998                subsystem, then this object contains a zero                value."            ::= { ipv6IfEntry 11 }         --  IPv6 Interface Statistics table         ipv6IfStatsTable OBJECT-TYPE             SYNTAX     SEQUENCE OF Ipv6IfStatsEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION                 "IPv6 interface traffic statistics."             ::= { ipv6MIBObjects 6 }         ipv6IfStatsEntry OBJECT-TYPE             SYNTAX     Ipv6IfStatsEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION                 "An interface statistics entry containing objects                 at a particular IPv6 interface."             AUGMENTS { ipv6IfEntry }             ::= { ipv6IfStatsTable 1 }         Ipv6IfStatsEntry ::= SEQUENCE {                 ipv6IfStatsInReceives                     Counter32,                 ipv6IfStatsInHdrErrors                     Counter32,                 ipv6IfStatsInTooBigErrors                     Counter32,                 ipv6IfStatsInNoRoutes                     Counter32,                 ipv6IfStatsInAddrErrors                     Counter32,                 ipv6IfStatsInUnknownProtos                     Counter32,                 ipv6IfStatsInTruncatedPkts                     Counter32,                 ipv6IfStatsInDiscards                     Counter32,                 ipv6IfStatsInDelivers                     Counter32,                 ipv6IfStatsOutForwDatagrams                     Counter32,                 ipv6IfStatsOutRequests                     Counter32,                 ipv6IfStatsOutDiscardsHaskin & Onishi             Standards Track                    [Page 12]

RFC 2465                IPv6 MIB: General Group            December 1998                     Counter32,                 ipv6IfStatsOutFragOKs                     Counter32,                 ipv6IfStatsOutFragFails                     Counter32,                 ipv6IfStatsOutFragCreates                     Counter32,                 ipv6IfStatsReasmReqds                     Counter32,                 ipv6IfStatsReasmOKs                     Counter32,                 ipv6IfStatsReasmFails                     Counter32,                 ipv6IfStatsInMcastPkts                     Counter32,                 ipv6IfStatsOutMcastPkts                     Counter32             }         ipv6IfStatsInReceives OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The total number of input datagrams received by                the interface, including those received in error."             ::= { ipv6IfStatsEntry 1 }         ipv6IfStatsInHdrErrors OBJECT-TYPE             SYNTAX     Counter32             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "The number of input datagrams discarded due to                errors in their IPv6 headers, including version                number mismatch, other format errors, hop count                exceeded, errors discovered in processing their                IPv6 options, etc."             ::= { ipv6IfStatsEntry 2 }         ipv6IfStatsInTooBigErrors OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The number of input datagrams that could not be               forwarded because their size exceeded the link MTU               of outgoing interface."Haskin & Onishi             Standards Track                    [Page 13]

RFC 2465                IPv6 MIB: General Group            December 1998             ::= { ipv6IfStatsEntry 3 }         ipv6IfStatsInNoRoutes OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of input datagrams discarded because no                 route could be found to transmit them to their                 destination."             ::= { ipv6IfStatsEntry 4 }         ipv6IfStatsInAddrErrors OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of input datagrams discarded because                the IPv6 address in their IPv6 header's destination                field was not a valid address to be received at                this entity.  This count includes invalid                addresses (e.g., ::0) and unsupported addresses                (e.g., addresses with unallocated prefixes).  For                entities which are not IPv6 routers and therefore                do not forward datagrams, this counter includes                datagrams discarded because the destination address                was not a local address."             ::= { ipv6IfStatsEntry 5 }         ipv6IfStatsInUnknownProtos OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of locally-addressed datagrams                received successfully but discarded because of an                unknown or unsupported protocol. This counter is                incremented at the interface to which these                datagrams were addressed which might not be                necessarily the input interface for some of                the datagrams."             ::= { ipv6IfStatsEntry 6 }         ipv6IfStatsInTruncatedPkts OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      currentHaskin & Onishi             Standards Track                    [Page 14]

RFC 2465                IPv6 MIB: General Group            December 1998             DESCRIPTION                "The number of input datagrams discarded because                 datagram frame didn't carry enough data."             ::= { ipv6IfStatsEntry 7 }         ipv6IfStatsInDiscards OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of input IPv6 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."             ::= { ipv6IfStatsEntry 8 }         ipv6IfStatsInDelivers OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION              "The total number of datagrams successfully              delivered to IPv6 user-protocols (including ICMP).              This counter is incremented at the interface to              which these datagrams were addressed which might              not be necessarily the input interface for some of              the datagrams."             ::= { ipv6IfStatsEntry 9 }         ipv6IfStatsOutForwDatagrams OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of output datagrams which this                entity received and forwarded to their final                destinations.  In entities which do not act                as IPv6 routers, this counter will include                only those packets which were Source-Routed                via this entity, and the Source-Route                processing was successful.  Note that for                a successfully forwarded datagram the counter                of the outgoing interface is incremented."             ::= { ipv6IfStatsEntry 10 }         ipv6IfStatsOutRequests OBJECT-TYPEHaskin & Onishi             Standards Track                    [Page 15]

RFC 2465                IPv6 MIB: General Group            December 1998             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION              "The total number of IPv6 datagrams which local IPv6              user-protocols (including ICMP) supplied to IPv6 in              requests for transmission.  Note that this counter              does not include any datagrams counted in              ipv6IfStatsOutForwDatagrams."             ::= { ipv6IfStatsEntry 11 }         ipv6IfStatsOutDiscards OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                 "The number of output IPv6 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 ipv6IfStatsOutForwDatagrams if any such packets                 met this (discretionary) discard criterion."             ::= { ipv6IfStatsEntry 12 }         ipv6IfStatsOutFragOKs OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of IPv6 datagrams that have been                 successfully fragmented at this output interface."             ::= { ipv6IfStatsEntry 13 }         ipv6IfStatsOutFragFails OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of IPv6 datagrams that have been                 discarded because they needed to be fragmented                 at this output interface but could not be."             ::= { ipv6IfStatsEntry 14 }         ipv6IfStatsOutFragCreates OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      currentHaskin & Onishi             Standards Track                    [Page 16]

RFC 2465                IPv6 MIB: General Group            December 1998             DESCRIPTION                "The number of output datagram fragments that have                 been generated as a result of fragmentation at                 this output interface."             ::= { ipv6IfStatsEntry 15 }         ipv6IfStatsReasmReqds OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of IPv6 fragments received which needed                 to be reassembled at this interface.  Note that this                 counter is incremented at the interface to which                 these fragments were addressed which might not                 be necessarily the input interface for some of                 the fragments."             ::= { ipv6IfStatsEntry 16 }         ipv6IfStatsReasmOKs OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The number of IPv6 datagrams successfully               reassembled.  Note that this counter is incremented               at the interface to which these datagrams were               addressed which might not be necessarily the input               interface for some of the fragments."             ::= { ipv6IfStatsEntry 17 }         ipv6IfStatsReasmFails OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of failures detected by the IPv6 re-                assembly algorithm (for whatever reason: timed                out, errors, etc.).  Note that this is not                necessarily a count of discarded IPv6 fragments                since some algorithms (notably the algorithm inRFC 815) can lose track of the number of fragments                by combining them as they are received.                This counter is incremented at the interface to which                these fragments were addressed which might not be                necessarily the input interface for some of the                fragments."             ::= { ipv6IfStatsEntry 18 }Haskin & Onishi             Standards Track                    [Page 17]

RFC 2465                IPv6 MIB: General Group            December 1998         ipv6IfStatsInMcastPkts OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS     current             DESCRIPTION                "The number of multicast packets received                 by the interface"             ::= { ipv6IfStatsEntry 19 }         ipv6IfStatsOutMcastPkts OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "The number of multicast packets transmitted                 by the interface"             ::= { ipv6IfStatsEntry 20 }         -- Address Prefix table         -- The IPv6 Address Prefix table contains information on         -- the entity's IPv6 Address Prefixes that are associated         -- with IPv6 interfaces.         ipv6AddrPrefixTable OBJECT-TYPE             SYNTAX  SEQUENCE OF Ipv6AddrPrefixEntry             MAX-ACCESS  not-accessible             STATUS      current             DESCRIPTION                 "The list of IPv6 address prefixes of                 IPv6 interfaces."             ::= { ipv6MIBObjects 7 }         ipv6AddrPrefixEntry OBJECT-TYPE             SYNTAX  Ipv6AddrPrefixEntry             MAX-ACCESS  not-accessible             STATUS      current             DESCRIPTION                 "An interface entry containing objects of                 a particular IPv6 address prefix."             INDEX   { ipv6IfIndex,                       ipv6AddrPrefix,                       ipv6AddrPrefixLength }             ::= { ipv6AddrPrefixTable 1 }         Ipv6AddrPrefixEntry ::= SEQUENCE {Haskin & Onishi             Standards Track                    [Page 18]

RFC 2465                IPv6 MIB: General Group            December 1998              ipv6AddrPrefix                     Ipv6AddressPrefix,              ipv6AddrPrefixLength               INTEGER (0..128),              ipv6AddrPrefixOnLinkFlag           TruthValue,              ipv6AddrPrefixAutonomousFlag       TruthValue,              ipv6AddrPrefixAdvPreferredLifetime Unsigned32,              ipv6AddrPrefixAdvValidLifetime     Unsigned32             }         ipv6AddrPrefix OBJECT-TYPE             SYNTAX      Ipv6AddressPrefix             MAX-ACCESS  not-accessible             STATUS      current             DESCRIPTION               "The prefix associated with the this interface."             ::= { ipv6AddrPrefixEntry 1 }         ipv6AddrPrefixLength OBJECT-TYPE             SYNTAX      INTEGER (0..128)             UNITS       "bits"             MAX-ACCESS  not-accessible             STATUS      current             DESCRIPTION               "The length of the prefix (in bits)."             ::= { ipv6AddrPrefixEntry 2 }         ipv6AddrPrefixOnLinkFlag OBJECT-TYPE             SYNTAX      TruthValue             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "This object has the value 'true(1)', if this               prefix can be used  for on-link determination               and the value 'false(2)' otherwise."             ::= { ipv6AddrPrefixEntry 3 }         ipv6AddrPrefixAutonomousFlag OBJECT-TYPE             SYNTAX      TruthValue             MAX-ACCESS  read-only             STATUS      current             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 autoconfigure               a local interface address."             ::= { ipv6AddrPrefixEntry 4 }Haskin & Onishi             Standards Track                    [Page 19]

RFC 2465                IPv6 MIB: General Group            December 1998         ipv6AddrPrefixAdvPreferredLifetime OBJECT-TYPE             SYNTAX      Unsigned32             UNITS       "seconds"             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION                "It is the length of time in seconds that this                prefix will remain 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."             ::= { ipv6AddrPrefixEntry 5 }         ipv6AddrPrefixAdvValidLifetime OBJECT-TYPE             SYNTAX      Unsigned32             UNITS       "seconds"             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "It is the length of time in seconds that this               prefix will remain 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."             ::= { ipv6AddrPrefixEntry 6 }         -- the IPv6 Address table         -- The IPv6 address table contains this node's IPv6         -- addressing information.         ipv6AddrTable OBJECT-TYPE            SYNTAX      SEQUENCE OF Ipv6AddrEntry            MAX-ACCESS  not-accessible            STATUS      current            DESCRIPTION              "The table of addressing information relevant to              this node's interface addresses."            ::= { ipv6MIBObjects 8 }Haskin & Onishi             Standards Track                    [Page 20]

RFC 2465                IPv6 MIB: General Group            December 1998         ipv6AddrEntry OBJECT-TYPE            SYNTAX      Ipv6AddrEntry            MAX-ACCESS  not-accessible            STATUS      current            DESCRIPTION                "The addressing information for one of this                node's interface addresses."            INDEX   { ipv6IfIndex, ipv6AddrAddress }            ::= { ipv6AddrTable 1 }         Ipv6AddrEntry ::=            SEQUENCE {                 ipv6AddrAddress        Ipv6Address,                 ipv6AddrPfxLength      INTEGER,                 ipv6AddrType           INTEGER,                 ipv6AddrAnycastFlag    TruthValue,                 ipv6AddrStatus         INTEGER                }         ipv6AddrAddress OBJECT-TYPE            SYNTAX      Ipv6Address            MAX-ACCESS  not-accessible            STATUS      current            DESCRIPTION              "The IPv6 address to which this entry's addressing              information pertains."            ::= { ipv6AddrEntry 1 }         ipv6AddrPfxLength OBJECT-TYPE            SYNTAX      INTEGER(0..128)            UNITS       "bits"            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "The length of the prefix (in bits) associated with              the IPv6 address of this entry."            ::= { ipv6AddrEntry 2 }         ipv6AddrType OBJECT-TYPE            SYNTAX      INTEGER {                                -- address has been formed                                -- using stateless                 stateless(1),  -- autoconfiguration                                -- address has been acquired                                -- by stateful means                                -- (e.g. DHCPv6, manual                 stateful(2),   -- configuration)Haskin & Onishi             Standards Track                    [Page 21]

RFC 2465                IPv6 MIB: General Group            December 1998                                -- type can not be determined                 unknown(3)     -- for some reason.               }            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION               "The type of address. Note that 'stateless(1)'               refers to an address that was statelessly               autoconfigured; 'stateful(2)' refers to a address               which was acquired by via a stateful protocol               (e.g. DHCPv6, manual configuration)."            ::= { ipv6AddrEntry 3 }         ipv6AddrAnycastFlag OBJECT-TYPE             SYNTAX      TruthValue             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "This object has the value 'true(1)', if this               address is an anycast address and the value               'false(2)' otherwise."             ::= { ipv6AddrEntry 4 }         ipv6AddrStatus OBJECT-TYPE            SYNTAX      INTEGER {                     preferred(1),                     deprecated(2),                     invalid(3),                     inaccessible(4),                     unknown(5)   -- status can not be determined                                  -- for some reason.                    }            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION              "Address status.  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 is not valid address which should notHaskin & Onishi             Standards Track                    [Page 22]

RFC 2465                IPv6 MIB: General Group            December 1998              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."            ::= { ipv6AddrEntry 5 }         -- IPv6 Routing objects         ipv6RouteNumber OBJECT-TYPE             SYNTAX      Gauge32             MAX-ACCESS  read-only             STATUS      current             DESCRIPTION               "The number of current ipv6RouteTable entries.               This is primarily to avoid having to read               the table in order to determine this number."             ::= { ipv6MIBObjects 9 }         ipv6DiscardedRoutes OBJECT-TYPE             SYNTAX      Counter32             MAX-ACCESS  read-only             STATUS      current             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."             ::= { ipv6MIBObjects 10 }         -- IPv6 Routing table         ipv6RouteTable OBJECT-TYPE             SYNTAX     SEQUENCE OF Ipv6RouteEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "IPv6 Routing table. This table contains               an entry for each valid IPv6 unicast route               that can be used for packet forwarding               determination."             ::= { ipv6MIBObjects 11 }         ipv6RouteEntry OBJECT-TYPE             SYNTAX     Ipv6RouteEntry             MAX-ACCESS not-accessibleHaskin & Onishi             Standards Track                    [Page 23]

RFC 2465                IPv6 MIB: General Group            December 1998             STATUS     current             DESCRIPTION                     "A routing entry."             INDEX   { ipv6RouteDest,                       ipv6RoutePfxLength,                       ipv6RouteIndex }             ::= { ipv6RouteTable 1 }         Ipv6RouteEntry ::= SEQUENCE {                 ipv6RouteDest           Ipv6Address,                 ipv6RoutePfxLength      INTEGER,                 ipv6RouteIndex          Unsigned32,                 ipv6RouteIfIndex        Ipv6IfIndexOrZero,                 ipv6RouteNextHop        Ipv6Address,                 ipv6RouteType           INTEGER,                 ipv6RouteProtocol       INTEGER,                 ipv6RoutePolicy         Integer32,                 ipv6RouteAge            Unsigned32,                 ipv6RouteNextHopRDI     Unsigned32,                 ipv6RouteMetric         Unsigned32,                 ipv6RouteWeight         Unsigned32,                 ipv6RouteInfo           RowPointer,                 ipv6RouteValid          TruthValue             }         ipv6RouteDest OBJECT-TYPE             SYNTAX     Ipv6Address             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "The destination IPv6 address of this route.               This object may not take a Multicast address               value."             ::= { ipv6RouteEntry 1 }         ipv6RoutePfxLength OBJECT-TYPE             SYNTAX     INTEGER(0..128)             UNITS      "bits"             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "Indicates the prefix length of the destination               address."             ::= { ipv6RouteEntry 2 }         ipv6RouteIndex OBJECT-TYPE             SYNTAX     Unsigned32             MAX-ACCESS not-accessibleHaskin & Onishi             Standards Track                    [Page 24]

RFC 2465                IPv6 MIB: General Group            December 1998             STATUS     current             DESCRIPTION               "The value which uniquely identifies the route               among the routes to the same network layer               destination.  The way this value is chosen is               implementation specific but it must be unique for               ipv6RouteDest/ipv6RoutePfxLength pair and remain               constant for the life of the route."             ::= { ipv6RouteEntry 3 }         ipv6RouteIfIndex OBJECT-TYPE             SYNTAX     Ipv6IfIndexOrZero             MAX-ACCESS read-only             STATUS     current             DESCRIPTION               "The index value which uniquely identifies the local               interface through which the next hop of this               route should be reached.  The interface identified               by a particular value of this index is the same               interface as identified by the same value of               ipv6IfIndex.  For routes of the discard type this               value can be zero."             ::= { ipv6RouteEntry 4 }         ipv6RouteNextHop OBJECT-TYPE             SYNTAX     Ipv6Address             MAX-ACCESS read-only             STATUS     current             DESCRIPTION               "On remote routes, the address of the next               system en route;  otherwise, ::0               ('00000000000000000000000000000000'H in ASN.1               string representation)."             ::= { ipv6RouteEntry 5 }         ipv6RouteType OBJECT-TYPE             SYNTAX     INTEGER {                other(1),     -- none of the following                              -- an route indicating that                              -- packets to destinations                              -- matching this route are                discard(2),   -- to be discarded                              -- route to directly                local(3),     -- connected (sub-)network                              -- route to a remoteHaskin & Onishi             Standards Track                    [Page 25]

RFC 2465                IPv6 MIB: General Group            December 1998                remote(4)     -- destination             }             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "The type of route. Note that 'local(3)' refers                to a route for which the next hop is the final                destination; 'remote(4)' refers to a route for                which  the  next  hop is not the final                destination; 'discard(2)' refers to a route                indicating that packets to destinations matching                this route are to be discarded (sometimes called                black-hole route)."             ::= { ipv6RouteEntry 6 }         ipv6RouteProtocol OBJECT-TYPE             SYNTAX     INTEGER {               other(1),   -- none of the following                           -- non-protocol information,                           -- e.g., manually configured               local(2),   -- entries               netmgmt(3), -- static route                           -- obtained via Neighbor                           -- Discovery protocol,               ndisc(4),   -- e.g., result of Redirect                           -- the following are all                           -- dynamic routing protocols               rip(5),     -- RIPng               ospf(6),    -- Open Shortest Path First               bgp(7),     -- Border Gateway Protocol               idrp(8),    -- InterDomain Routing Protocol               igrp(9)     -- InterGateway Routing Protocol             }             MAX-ACCESS read-only             STATUS     current             DESCRIPTION               "The routing mechanism via which this route was               learned."             ::= { ipv6RouteEntry 7 }         ipv6RoutePolicy OBJECT-TYPE             SYNTAX     Integer32             MAX-ACCESS read-onlyHaskin & Onishi             Standards Track                    [Page 26]

RFC 2465                IPv6 MIB: General Group            December 1998             STATUS     current             DESCRIPTION              "The general set of conditions that would cause the              selection of one multipath route (set of next hops              for a given destination) is referred to as 'policy'.              Unless the mechanism indicated by ipv6RouteProtocol              specified otherwise, the policy specifier is the              8-bit Traffic Class field of the IPv6 packet header              that is zero extended at the left to a 32-bit value.              Protocols defining 'policy' otherwise must either              define a set of values which are valid for              this object or must implement an integer-              instanced  policy table for which this object's              value acts as an index."             ::= { ipv6RouteEntry 8 }         ipv6RouteAge OBJECT-TYPE             SYNTAX     Unsigned32             UNITS      "seconds"             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "The number of seconds since this route was last                updated or otherwise determined to be correct.                Note that no semantics of `too old' can be implied                except through knowledge of the routing protocol                by which the route was learned."             ::= { ipv6RouteEntry 9 }         ipv6RouteNextHopRDI OBJECT-TYPE             SYNTAX     Unsigned32             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "The Routing Domain ID of the Next Hop.                The  semantics of this object are determined by                the routing-protocol specified in  the  route's                ipv6RouteProtocol value.   When  this object is                unknown or not relevant its value should be set                to zero."             ::= { ipv6RouteEntry 10 }         ipv6RouteMetric OBJECT-TYPE             SYNTAX     Unsigned32             MAX-ACCESS read-only             STATUS     current             DESCRIPTIONHaskin & Onishi             Standards Track                    [Page 27]

RFC 2465                IPv6 MIB: General Group            December 1998                "The routing metric for this route. The                semantics of this metric are determined by the                routing protocol specified in the route's                ipv6RouteProtocol value.  When this is unknown                or not relevant to the protocol indicated by                ipv6RouteProtocol, the object value should be                set to its maximum value (4,294,967,295)."             ::= { ipv6RouteEntry 11 }         ipv6RouteWeight OBJECT-TYPE             SYNTAX     Unsigned32             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "The system internal weight value for this route.                The semantics of this value are determined by                the implementation specific rules. Generally,                within routes with the same ipv6RoutePolicy value,                the lower the weight value the more preferred is                the route."             ::= { ipv6RouteEntry 12 }         ipv6RouteInfo OBJECT-TYPE             SYNTAX     RowPointer             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                "A reference to MIB definitions specific to the                particular routing protocol which is responsible                for this route, as determined by the  value                specified  in the route's ipv6RouteProto value.                If this information is not present,  its  value                should be set to the OBJECT ID { 0 0 },                which is a syntactically valid object  identifier,                and any implementation conforming to ASN.1                and the Basic Encoding Rules must  be  able  to                generate and recognize this value."             ::= { ipv6RouteEntry 13 }         ipv6RouteValid OBJECT-TYPE             SYNTAX     TruthValue             MAX-ACCESS read-write             STATUS     current             DESCRIPTION                "Setting this object to the value 'false(2)' has                the effect of invalidating the corresponding entry                in the ipv6RouteTable object.  That is, it                effectively disassociates the destinationHaskin & Onishi             Standards Track                    [Page 28]

RFC 2465                IPv6 MIB: General Group            December 1998                identified with said entry from the route                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 ipv6RouteValid                object."             DEFVAL  { true }             ::= { ipv6RouteEntry 14 }         -- IPv6 Address Translation table         ipv6NetToMediaTable OBJECT-TYPE             SYNTAX      SEQUENCE OF Ipv6NetToMediaEntry             MAX-ACCESS  not-accessible             STATUS      current             DESCRIPTION               "The IPv6 Address Translation table used for               mapping from IPv6 addresses to physical addresses.               The IPv6 address translation table contain the               Ipv6Address to `physical' address equivalencies.               Some interfaces do not use translation tables               for determining address equivalencies; if all               interfaces are of this type, then the Address               Translation table is empty, i.e., has zero               entries."             ::= { ipv6MIBObjects 12 }         ipv6NetToMediaEntry OBJECT-TYPE             SYNTAX     Ipv6NetToMediaEntry             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION               "Each entry contains one IPv6 address to `physical'               address equivalence."             INDEX   { ipv6IfIndex,                       ipv6NetToMediaNetAddress }             ::= { ipv6NetToMediaTable 1 }         Ipv6NetToMediaEntry ::= SEQUENCE {                 ipv6NetToMediaNetAddress                     Ipv6Address,                 ipv6NetToMediaPhysAddressHaskin & Onishi             Standards Track                    [Page 29]

RFC 2465                IPv6 MIB: General Group            December 1998                     PhysAddress,                 ipv6NetToMediaType                     INTEGER,                 ipv6IfNetToMediaState                     INTEGER,                 ipv6IfNetToMediaLastUpdated                     TimeStamp,                 ipv6NetToMediaValid                     TruthValue             }         ipv6NetToMediaNetAddress OBJECT-TYPE             SYNTAX     Ipv6Address             MAX-ACCESS not-accessible             STATUS     current             DESCRIPTION                "The IPv6 Address corresponding to                the media-dependent `physical' address."             ::= { ipv6NetToMediaEntry 1 }         ipv6NetToMediaPhysAddress OBJECT-TYPE             SYNTAX     PhysAddress             MAX-ACCESS read-only             STATUS     current             DESCRIPTION               "The media-dependent `physical' address."             ::= { ipv6NetToMediaEntry 2 }         ipv6NetToMediaType OBJECT-TYPE             SYNTAX     INTEGER {                         other(1),    -- none of the following                         dynamic(2),  -- dynamically resolved                         static(3),   -- statically configured                         local(4)     -- local interface                        }             MAX-ACCESS read-only             STATUS     current             DESCRIPTION                     "The type of the mapping. The 'dynamic(2)' type                     indicates that the IPv6 address to physical                     addresses mapping has been dynamically                     resolved using the IPv6 Neighbor Discovery                     protocol. The static(3)' types indicates that                     the mapping has been statically configured.                     The local(4) indicates that the mapping is                     provided for an entity's own interface address."             ::= { ipv6NetToMediaEntry 3 }Haskin & Onishi             Standards Track                    [Page 30]

RFC 2465                IPv6 MIB: General Group            December 1998        ipv6IfNetToMediaState OBJECT-TYPE            SYNTAX      INTEGER {                     reachable(1), -- confirmed reachability                     stale(2),     -- unconfirmed reachability                     delay(3),     -- waiting for reachability                                   -- confirmation before entering                                   -- the probe state                     probe(4),     -- actively probing                     invalid(5),   -- an invalidated mapping                     unknown(6)    -- state can not be determined                                   -- for some reason.                    }            MAX-ACCESS  read-only            STATUS      current            DESCRIPTION                "The Neighbor Unreachability Detection [8] state                for the interface when the address mapping in                this entry is used."            ::= { ipv6NetToMediaEntry 4 }        ipv6IfNetToMediaLastUpdated OBJECT-TYPE            SYNTAX      TimeStamp            MAX-ACCESS  read-only            STATUS      current            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."            ::= { ipv6NetToMediaEntry 5 }         ipv6NetToMediaValid OBJECT-TYPE             SYNTAX     TruthValue             MAX-ACCESS read-write             STATUS     current             DESCRIPTION              "Setting this object to the value 'false(2)' has              the effect of invalidating the corresponding entry              in the ipv6NetToMediaTable.  That is, it effectively              disassociates the interface identified with said              entry from the mapping identified with said entry.              It is an implementation-specific matter as toHaskin & Onishi             Standards Track                    [Page 31]

RFC 2465                IPv6 MIB: General Group            December 1998              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              ipv6NetToMediaValid object."             DEFVAL  { true }             ::= { ipv6NetToMediaEntry 6 }        -- definition of IPv6-related notifications.        -- Note that we need ipv6NotificationPrefix with the 0        -- sub-identifier to make this MIB to translate to        -- an SNMPv1 format in a reversible way. For example        -- it is needed for proxies that convert SNMPv1 traps        -- to SNMPv2 notifications without MIB knowledge.        ipv6Notifications      OBJECT IDENTIFIER             ::= { ipv6MIB 2 }        ipv6NotificationPrefix OBJECT IDENTIFIER             ::= { ipv6Notifications 0 }        ipv6IfStateChange NOTIFICATION-TYPE             OBJECTS {                      ipv6IfDescr,                      ipv6IfOperStatus -- the new state of the If.                     }             STATUS             current             DESCRIPTION                "An ipv6IfStateChange notification signifies                that there has been a change in the state of                an ipv6 interface.  This notification should                be generated when the interface's operational                status transitions to or from the up(1) state."             ::= { ipv6NotificationPrefix 1 }        -- conformance information        ipv6Conformance OBJECT IDENTIFIER ::= { ipv6MIB 3 }        ipv6Compliances OBJECT IDENTIFIER ::= { ipv6Conformance 1 }        ipv6Groups      OBJECT IDENTIFIER ::= { ipv6Conformance 2 }        -- compliance statementsHaskin & Onishi             Standards Track                    [Page 32]

RFC 2465                IPv6 MIB: General Group            December 1998        ipv6Compliance MODULE-COMPLIANCE            STATUS  current            DESCRIPTION              "The compliance statement for SNMPv2 entities which              implement ipv6 MIB."            MODULE  -- this module                MANDATORY-GROUPS { ipv6GeneralGroup,                                   ipv6NotificationGroup }                  OBJECT    ipv6Forwarding                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6DefaultHopLimit                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6IfDescr                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6IfIdentifier                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6IfIdentifierLength                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6IfAdminStatus                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6RouteValid                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide write                        access to this object"                  OBJECT    ipv6NetToMediaValid                    MIN-ACCESS  read-only                    DESCRIPTION                       "An agent is not required to provide writeHaskin & Onishi             Standards Track                    [Page 33]

RFC 2465                IPv6 MIB: General Group            December 1998                        access to this object"            ::= { ipv6Compliances 1 }        ipv6GeneralGroup OBJECT-GROUP            OBJECTS { ipv6Forwarding,                      ipv6DefaultHopLimit,                      ipv6Interfaces,                      ipv6IfTableLastChange,                      ipv6IfDescr,                      ipv6IfLowerLayer,                      ipv6IfEffectiveMtu,                      ipv6IfReasmMaxSize,                      ipv6IfIdentifier,                      ipv6IfIdentifierLength,                      ipv6IfPhysicalAddress,                      ipv6IfAdminStatus,                      ipv6IfOperStatus,                      ipv6IfLastChange,                      ipv6IfStatsInReceives,                      ipv6IfStatsInHdrErrors,                      ipv6IfStatsInTooBigErrors,                      ipv6IfStatsInNoRoutes,                      ipv6IfStatsInAddrErrors,                      ipv6IfStatsInUnknownProtos,                      ipv6IfStatsInTruncatedPkts,                      ipv6IfStatsInDiscards,                      ipv6IfStatsInDelivers,                      ipv6IfStatsOutForwDatagrams,                      ipv6IfStatsOutRequests,                      ipv6IfStatsOutDiscards,                      ipv6IfStatsOutFragOKs,                      ipv6IfStatsOutFragFails,                      ipv6IfStatsOutFragCreates,                      ipv6IfStatsReasmReqds,                      ipv6IfStatsReasmOKs,                      ipv6IfStatsReasmFails,                      ipv6IfStatsInMcastPkts,                      ipv6IfStatsOutMcastPkts,                      ipv6AddrPrefixOnLinkFlag,                      ipv6AddrPrefixAutonomousFlag,                      ipv6AddrPrefixAdvPreferredLifetime,                      ipv6AddrPrefixAdvValidLifetime,                      ipv6AddrPfxLength,                      ipv6AddrType,                      ipv6AddrAnycastFlag,                      ipv6AddrStatus,                      ipv6RouteNumber,                      ipv6DiscardedRoutes,Haskin & Onishi             Standards Track                    [Page 34]

RFC 2465                IPv6 MIB: General Group            December 1998                      ipv6RouteIfIndex,                      ipv6RouteNextHop,                      ipv6RouteType,                      ipv6RouteProtocol,                      ipv6RoutePolicy,                      ipv6RouteAge,                      ipv6RouteNextHopRDI,                      ipv6RouteMetric,                      ipv6RouteWeight,                      ipv6RouteInfo,                      ipv6RouteValid,                      ipv6NetToMediaPhysAddress,                      ipv6NetToMediaType,                      ipv6IfNetToMediaState,                      ipv6IfNetToMediaLastUpdated,                      ipv6NetToMediaValid }            STATUS    current            DESCRIPTION                 "The IPv6 group of objects providing for basic                  management of IPv6 entities."            ::= { ipv6Groups 1 }        ipv6NotificationGroup NOTIFICATION-GROUP            NOTIFICATIONS { ipv6IfStateChange }            STATUS    current            DESCRIPTION                 "The notification that an IPv6 entity is required                  to implement."            ::= { ipv6Groups 2 }         ENDHaskin & Onishi             Standards Track                    [Page 35]

RFC 2465                IPv6 MIB: General Group            December 19986.  Acknowledgments   This document borrows from MIB works produced by IETF for IPv4-based   internets.   We would like to thanks the following individuals for constructive   and valuable comments:         Mike Daniele,         Margaret Forsythe,         Tim Hartrick,         Jean-Pierre Roch,         Juergen Schoenwaelder,         Frank Solensky,         Vivek Venkatraman.7.  References   [1]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,        and S.  Waldbusser, "Structure of Management Information for        Version 2 of the Simple Network Management Protocol (SNMPv2)",RFC 1902, January 1996.   [2]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.,        and S. Waldbusser, "Textual Conventions for Version 2 of the        Simple Network Management Protocol (SNMPv2)",RFC 1903, January        1996.   [3]  McCloghrie, K., and M. Rose, Editors, "Management        Information Base for Network Management of TCP/IP-based        internets: MIB-II", STD 17,RFC 1213, Hughes LAN Systems,        Performance Systems International, March 1991.   [4]  Case, J., Fedor, M., Schoffstall, M., and  J.  Davin, "A        Simple Network Management Protocol (SNMP)", STD 15,RFC 1157,        SNMP Research, Performance Systems International, MIT Lab for        Computer Science, May 1990.   [5]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.        and S. Waldbusser, "Protocol Operations for Version 2 of the        Simple Network Management Protocol (SNMPv2)",RFC 1905, January        1996.   [6]  McCloghrie, K. and F. Kastenholz, "Evolution of the        Interfaces Group of MIB-II",RFC 1573, January 1994.   [7]  Deering, S., and R. Hinden, Editors, "Internet Protocol,        Version 6 (IPv6) Specification",RFC 2460, December 1998.Haskin & Onishi             Standards Track                    [Page 36]

RFC 2465                IPv6 MIB: General Group            December 1998   [8]  Narten, T., Nordmark E., and W. Simpson, "Neighbor        Discovery for IP Version 6 (IPv6)",RFC 2461, December 1998.   [9]  Haskin, D., and S. Onishi, "Management Information Base        for IP Version 6: ICMPv6 Group",RFC 2466, December 1998.8.  Security Considerations   Certain management information defined in this MIB may be considered   sensitive in some network environments.   Therefore, authentication of received SNMP requests and controlled   access to management information should be employed in such   environments.9.  Authors' Addresses   Dimitry Haskin   Bay Networks, Inc.   600 Technology Park Drive   Billerica, MA 01821   EMail: dhaskin@baynetworks.com   Steve Onishi   Bay Networks, Inc.   3 Federal Street   Billerica, MA 01821   EMail: sonishi@baynetworks.comHaskin & Onishi             Standards Track                    [Page 37]

RFC 2465                IPv6 MIB: General Group            December 199810.  Full Copyright Statement   Copyright (C) The Internet Society (1997).  All Rights Reserved.   This document and translations of it may be copied and furnished to   others, and derivative works that comment on or otherwise explain it   or assist in its implementation may be prepared, copied, published   and distributed, in whole or in part, without restriction of any   kind, provided that the above copyright notice and this paragraph are   included on all such copies and derivative works.  However, this   document itself may not be modified in any way, such as by removing   the copyright notice or references to the Internet Society or other   Internet organizations, except as needed for the purpose of   developing Internet standards in which case the procedures for   copyrights defined in the Internet Standards process must be   followed, or as required to translate it into languages other than   English.   The limited permissions granted above are perpetual and will not be   revoked by the Internet Society or its successors or assigns.   This document and the information contained herein is provided on an   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE."Haskin & Onishi             Standards Track                    [Page 38]

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