rfc2021.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

-- { rmon 1 } through { rmon 10 } are defined in RMON and
-- the Token Ring RMON MIB [RFC 1513]




Waldbusser                  Standards Track                    [Page 12]

RFC 2021             Remote Network Monitoring MIB          January 1997


    protocolDir     OBJECT IDENTIFIER ::= { rmon 11 }
    protocolDist    OBJECT IDENTIFIER ::= { rmon 12 }
    addressMap      OBJECT IDENTIFIER ::= { rmon 13 }
    nlHost          OBJECT IDENTIFIER ::= { rmon 14 }
    nlMatrix        OBJECT IDENTIFIER ::= { rmon 15 }
    alHost          OBJECT IDENTIFIER ::= { rmon 16 }
    alMatrix        OBJECT IDENTIFIER ::= { rmon 17 }
    usrHistory      OBJECT IDENTIFIER ::= { rmon 18 }
    probeConfig     OBJECT IDENTIFIER ::= { rmon 19 }
    rmonConformance OBJECT IDENTIFIER ::= { rmon 20 }

-- Textual Conventions

ZeroBasedCounter32 ::= TEXTUAL-CONVENTION
    STATUS current
    DESCRIPTION
        "This TC describes an object which counts events with the
        following semantics: objects of this type will be set to
        zero(0) on creation and will thereafter count appropriate
        events, wrapping back to zero(0) when the value 2^32 is
        reached.

        Provided that an application discovers the new object within
        the minimum time to wrap it can use the initial value as a
        delta since it last polled the table of which this object is
        part.  It is important for a management station to be aware of
        this minimum time and the actual time between polls, and to
        discard data if the actual time is too long or there is no
        defined minimum time.

        Typically this TC is used in tables where the INDEX space is
        constantly changing and/or the TimeFilter mechanism is in use."
    SYNTAX Gauge32

LastCreateTime ::= TEXTUAL-CONVENTION
    STATUS current
    DESCRIPTION
        "This TC describes an object that stores the last time its
        entry was created.

        This can be used for polling applications to determine that an
        entry has been deleted and re-created between polls, causing
        an otherwise undetectable discontinuity in the data."
    SYNTAX TimeStamp

TimeFilter ::= TEXTUAL-CONVENTION
    STATUS        current
    DESCRIPTION



Waldbusser                  Standards Track                    [Page 13]

RFC 2021             Remote Network Monitoring MIB          January 1997


        "To be used for the index to a table.  Allows an application
        to download only those rows changed since a particular time.
        A row is considered changed if the value of any object in the
        row changes or if the row is created or deleted.

        When sysUpTime is equal to zero, this table shall be empty.

        One entry exists for each past value of sysUpTime, except that
        the whole table is purged should sysUpTime wrap.

        As this basic row is updated new conceptual rows are created
        (which still share the now updated object values with all
        other instances).  The number of instances which are created
        is determined by the value of sysUpTime at which the basic row
        was last updated.  One instance will exist for each value of
        sysUpTime at the last update time for the row.  A new
        timeMark instance is created for each new sysUpTime value.
        Each new conceptual row will be associated with the timeMark
        instance which was created at the value of sysUpTime with
        which the conceptual row is to be associated.

        By definition all conceptual rows were updated at or after
        time zero and so at least one conceptual row (associated with
        timeMark.0) must exist for each underlying (basic) row.

        See the appendix for further discussion of this variable.

        Consider the following fooTable:

        fooTable ...
        INDEX { fooTimeMark, fooIndex }

        FooEntry {
           fooTimeMark  TimeFilter
           fooIndex     INTEGER,
           fooCounts    Counter
        }

        Should there be two basic rows in this table (fooIndex == 1,
        fooIndex == 2) and row 1 was updated most recently at time 6,
        while row 2 was updated most recently at time 8, and both rows
        had been updated on several earlier occasions such that the
        current values were 5 and 9 respectively then the following
        fooCounts instances would exist.

        fooCounts.0.1  5
        fooCounts.0.2  9
        fooCounts.1.1  5



Waldbusser                  Standards Track                    [Page 14]

RFC 2021             Remote Network Monitoring MIB          January 1997


        fooCounts.1.2  9
        fooCounts.2.1  5
        fooCounts.2.2  9
        fooCounts.3.1  5
        fooCounts.3.2  9
        fooCounts.4.1  5
        fooCounts.4.2  9
        fooCounts.5.1  5
        fooCounts.5.2  9
        fooCounts.6.1  5
        fooCounts.6.2  9
        fooCounts.7.2  9    -- note that row 1 doesn't exist for
        fooCounts.8.2  9    -- times 7 and 8"
    SYNTAX    TimeTicks

DataSource ::= TEXTUAL-CONVENTION
    STATUS        current
    DESCRIPTION
        "Identifies the source of the data that the associated
        function is configured to analyze. This source can be any
        interface on this device.

        In order to identify a particular interface, this
        object shall identify the instance of the ifIndex
        object, defined in [3,5], for the desired interface.

        For example, if an entry were to receive data from
        interface #1, this object would be set to ifIndex.1."
    SYNTAX      OBJECT IDENTIFIER
--
-- Protocol Directory Group
--
-- Lists the inventory of protocols the probe has the capability of
-- monitoring and allows the addition, deletion, and configuration of
-- entries in this list.

protocolDirLastChange OBJECT-TYPE
    SYNTAX      TimeStamp
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The value of sysUpTime at the time the protocol directory
        was last modified, either through insertions or deletions,
        or through modifications of either the
        protocolDirAddressMapConfig, protocolDirHostConfig, or
        protocolDirMatrixConfig."
    ::= { protocolDir 1 }




Waldbusser                  Standards Track                    [Page 15]

RFC 2021             Remote Network Monitoring MIB          January 1997


protocolDirTable OBJECT-TYPE
    SYNTAX      SEQUENCE OF ProtocolDirEntry
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
        "This table lists the protocols that this agent has the
        capability to decode and count.  There is one entry in this
        table for each such protocol.  These protocols represent
        different network layer, transport layer, and higher-layer
        protocols.  The agent should boot up with this table
        preconfigured with those protocols that it knows about and
        wishes to monitor.  Implementations are strongly encouraged to
        support protocols higher than the network layer (at least for
        the protocol distribution group), even for implementations
        that don't support the application layer groups."
    ::= { protocolDir 2 }

protocolDirEntry OBJECT-TYPE
    SYNTAX      ProtocolDirEntry
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
        "A conceptual row in the protocolDirTable.

         An example of the indexing of this entry is
         protocolDirLocalIndex.8.0.0.0.1.0.0.8.0.2.0.0, which is the
         encoding of a length of 8, followed by 8 subids encoding the
         protocolDirID of 1.2048, followed by a length of 2 and the
         2 subids encoding zero-valued parameters."
    INDEX { protocolDirID, protocolDirParameters }
    ::= { protocolDirTable  1 }

ProtocolDirEntry ::= SEQUENCE {
    protocolDirID                   OCTET STRING,
    protocolDirParameters           OCTET STRING,
    protocolDirLocalIndex           Integer32,
    protocolDirDescr                DisplayString,
    protocolDirType                 BITS,
    protocolDirAddressMapConfig     INTEGER,
    protocolDirHostConfig           INTEGER,
    protocolDirMatrixConfig         INTEGER,
    protocolDirOwner                OwnerString,
    protocolDirStatus               RowStatus
}

protocolDirID OBJECT-TYPE
    SYNTAX      OCTET STRING
    MAX-ACCESS  not-accessible



Waldbusser                  Standards Track                    [Page 16]

RFC 2021             Remote Network Monitoring MIB          January 1997


    STATUS      current
    DESCRIPTION
        "A unique identifier for a particular protocol.  Standard
        identifiers will be defined in a manner such that they
        can often be used as specifications for new protocols - i.e.
        a tree-structured assignment mechanism that matches the
        protocol encapsulation `tree' and which has algorithmic
        assignment mechanisms for certain subtrees. See RFC XXX for
        more details.

        Despite the algorithmic mechanism, the probe will only place
        entries in here for those protocols it chooses to collect.  In
        other words, it need not populate this table with all of the
        possible ethernet protocol types, nor need it create them on
        the fly when it sees them.  Whether or not it does these
        things is a matter of product definition (cost/benefit,
        usability), and is up to the designer of the product.

        If an entry is written to this table with a protocolDirID that
        the agent doesn't understand, either directly or
        algorithmically, the SET request will be rejected with an
        inconsistentName or badValue (for SNMPv1) error."
    ::= { protocolDirEntry 1 }

protocolDirParameters OBJECT-TYPE
    SYNTAX      OCTET STRING
    MAX-ACCESS  not-accessible
    STATUS      current
    DESCRIPTION
        "A set of parameters for the associated protocolDirID.
        See the associated RMON2 Protocol Identifiers document
        for a description of the possible parameters. There
        will be one octet in this string for each sub-identifier in
        the protocolDirID, and the parameters will appear here in the
        same order as the associated sub-identifiers appear in the
        protocolDirID.

        Every node in the protocolDirID tree has a different, optional
        set of parameters defined (that is, the definition of
        parameters for a node is optional).  The proper parameter
        value for each node is included in this string.  Note that the
        inclusion of a parameter value in this string for each node is
        not optional - what is optional is that a node may have no
        parameters defined, in which case the parameter field for that
        node will be zero."
    ::= { protocolDirEntry 2 }

protocolDirLocalIndex OBJECT-TYPE



Waldbusser                  Standards Track                    [Page 17]

RFC 2021             Remote Network Monitoring MIB          January 1997


    SYNTAX      Integer32 (1..2147483647)
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
        "The locally arbitrary, but unique identifier associated
        with this protocolDir entry.

        The value for each supported protocol must remain constant at
        least from one re-initialization of the entity's network
        management system to the next re-initialization, except that
        if a protocol is deleted and re-created, it must be re-created
        with a new value that has not been used since the last
        re-initialization.

        The specific value is meaningful only within a given SNMP
        entity. A protocolDirLocalIndex must not be re-used until the
        next agent-restart in the event the protocol directory entry
        is deleted."
    ::= { protocolDirEntry 3 }

protocolDirDescr OBJECT-TYPE
    SYNTAX      DisplayString (SIZE (1..64))
    MAX-ACCESS  read-create
    STATUS      current
    DESCRIPTION
        "A textual description of the protocol encapsulation.
        A probe may choose to describe only a subset of the
        entire encapsulation (e.g. only the highest layer).

        This object is intended for human consumption only.

        This object may not be modified if the associated
        protocolDirStatus object is equal to active(1)."
    ::= { protocolDirEntry 4 }

protocolDirType OBJECT-TYPE
    SYNTAX      BITS {
                    extensible(0),
                    addressRecognitionCapable(1)
                }
    MAX-ACCESS  read-only