rfc1907.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

Network Working Group                               SNMPv2 Working Group
Request for Comments: 1907                                       J. Case
Obsoletes: 1450                                      SNMP Research, Inc.
Category: Standards Track                                  K. McCloghrie
                                                     Cisco Systems, Inc.
                                                                 M. Rose
                                            Dover Beach Consulting, Inc.
                                                           S. Waldbusser
                                          International Network Services
                                                            January 1996


                      Management Information Base
                          for Version 2 of the
              Simple Network Management Protocol (SNMPv2)

Status 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.

Table of Contents

   1. Introduction ................................................    2
   1.1 A Note on Terminology ......................................    2
   2. Definitions .................................................    2
   2.1 The System Group ...........................................    3
   2.2 The SNMP Group .............................................    7
   2.4 Information for Notifications ..............................    9
   2.4.1 Well-known Traps .........................................   10
   2.5 The Set Group ..............................................   11
   2.6 Conformance Information ....................................   11
   2.6.1 Compliance Statements ....................................   11
   2.6.2 Units of Conformance .....................................   12
   2.6.3 Obsolete Definitions .....................................   13
   3. Security Considerations .....................................   18
   4. Editor's Address ............................................   19
   5. Acknowledgements ............................................   19
   6. References ..................................................   20









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1.  Introduction

   A management system contains:  several (potentially many) nodes, each
   with a processing entity, termed an agent, which has access to
   management instrumentation; at least one management station; and, a
   management protocol, used to convey management information between
   the agents and management stations.  Operations of the protocol are
   carried out under an administrative framework which defines
   authentication, authorization, access control, and privacy policies.

   Management stations execute management applications which monitor and
   control managed elements.  Managed elements are devices such as
   hosts, routers, terminal servers, etc., which are monitored and
   controlled via access to their management information.

   Management information is viewed as a collection of managed objects,
   residing in a virtual information store, termed the Management
   Information Base (MIB).  Collections of related objects are defined
   in MIB modules.  These modules are written using a subset of OSI's
   Abstract Syntax Notation One (ASN.1) [1], termed the Structure of
   Management Information (SMI) [2].

   The management protocol, SNMPv2 [3], provides for the exchange of
   messages which convey management information between the agents and
   the management stations.  It is the purpose of this document to
   define managed objects which describe the behavior of a SNMPv2
   entity.

1.1.  A Note on Terminology

   For the purpose of exposition, the original Internet-standard Network
   Management Framework, as described in RFCs 1155 (STD 16), 1157 (STD
   15), and 1212 (STD 16), is termed the SNMP version 1 framework
   (SNMPv1).  The current framework is termed the SNMP version 2
   framework (SNMPv2).

2.  Definitions

SNMPv2-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
    TimeTicks, Counter32, snmpModules, mib-2
        FROM SNMPv2-SMI
    DisplayString, TestAndIncr, TimeStamp
        FROM SNMPv2-TC
    MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
        FROM SNMPv2-CONF;



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snmpMIB MODULE-IDENTITY
    LAST-UPDATED "9511090000Z"
    ORGANIZATION "IETF SNMPv2 Working Group"
    CONTACT-INFO
            "        Marshall T. Rose

             Postal: Dover Beach Consulting, Inc.
                     420 Whisman Court
                     Mountain View, CA  94043-2186
                     US

                Tel: [phone]

             E-mail: [e-mail]"
    DESCRIPTION
            "The MIB module for SNMPv2 entities."
    REVISION      "9304010000Z"
    DESCRIPTION
            "The initial revision of this MIB module was published as
            RFC 1450."
    ::= { snmpModules 1 }


snmpMIBObjects OBJECT IDENTIFIER ::= { snmpMIB 1 }

--  ::= { snmpMIBObjects 1 }        this OID is obsolete
--  ::= { snmpMIBObjects 2 }        this OID is obsolete
--  ::= { snmpMIBObjects 3 }        this OID is obsolete


-- the System group
--
-- a collection of objects common to all managed systems.

system   OBJECT IDENTIFIER ::= { mib-2 1 }

sysDescr OBJECT-TYPE
    SYNTAX      DisplayString (SIZE (0..255))
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "A textual description of the entity.  This value should
            include the full name and version identification of the
            system's hardware type, software operating-system, and
            networking software."
    ::= { system 1 }

sysObjectID OBJECT-TYPE



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    SYNTAX      OBJECT IDENTIFIER
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "The vendor's authoritative identification of the network
            management subsystem contained in the entity.  This value is
            allocated within the SMI enterprises subtree (1.3.6.1.4.1)
            and provides an easy and unambiguous means for determining
            `what kind of box' is being managed.  For example, if vendor
            `Flintstones, Inc.' was assigned the subtree
            1.3.6.1.4.1.4242, it could assign the identifier
            1.3.6.1.4.1.4242.1.1 to its `Fred Router'."
    ::= { system 2 }

sysUpTime OBJECT-TYPE
    SYNTAX      TimeTicks
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "The time (in hundredths of a second) since the network
            management portion of the system was last re-initialized."
    ::= { system 3 }

sysContact OBJECT-TYPE
    SYNTAX      DisplayString (SIZE (0..255))
    MAX-ACCESS  read-write
    STATUS      current
    DESCRIPTION
            "The textual identification of the contact person for this
            managed node, together with information on how to contact
            this person.  If no contact information is known, the value
            is the zero-length string."
    ::= { system 4 }

sysName OBJECT-TYPE
    SYNTAX      DisplayString (SIZE (0..255))
    MAX-ACCESS  read-write
    STATUS      current
    DESCRIPTION
            "An administratively-assigned name for this managed node.
            By convention, this is the node's fully-qualified domain
            name.  If the name is unknown, the value is the zero-length
            string."
    ::= { system 5 }

sysLocation OBJECT-TYPE
    SYNTAX      DisplayString (SIZE (0..255))
    MAX-ACCESS  read-write



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    STATUS      current
    DESCRIPTION
            "The physical location of this node (e.g., `telephone
            closet, 3rd floor').  If the location is unknown, the value
            is the zero-length string."
    ::= { system 6 }

sysServices OBJECT-TYPE
    SYNTAX      INTEGER (0..127)
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "A value which indicates the set of services that this
            entity may potentially offers.  The value is a sum.  This
            sum initially takes the value zero, Then, for each layer, L,
            in the range 1 through 7, that this node performs
            transactions for, 2 raised to (L - 1) is added to the sum.
            For example, a node which performs only routing functions
            would have a value of 4 (2^(3-1)).  In contrast, a node
            which is a host offering application services would have a
            value of 72 (2^(4-1) + 2^(7-1)).  Note that in the context
            of the Internet suite of protocols, values should be
            calculated accordingly:

                 layer      functionality
                   1        physical (e.g., repeaters)
                   2        datalink/subnetwork (e.g., bridges)
                   3        internet (e.g., supports the IP)
                   4        end-to-end  (e.g., supports the TCP)
                   7        applications (e.g., supports the SMTP)

            For systems including OSI protocols, layers 5 and 6 may also
            be counted."
    ::= { system 7 }


-- object resource information
--
-- a collection of objects which describe the SNMPv2 entity's
-- (statically and dynamically configurable) support of
-- various MIB modules.

sysORLastChange OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The value of sysUpTime at the time of the most recent



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            change in state or value of any instance of sysORID."
    ::= { system 8 }

sysORTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF SysOREntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The (conceptual) table listing the capabilities of the
            local SNMPv2 entity acting in an agent role with respect to
            various MIB modules.  SNMPv2 entities having dynamically-
            configurable support of MIB modules will have a
            dynamically-varying number of conceptual rows."
    ::= { system 9 }

sysOREntry OBJECT-TYPE
    SYNTAX     SysOREntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "An entry (conceptual row) in the sysORTable."
    INDEX      { sysORIndex }
    ::= { sysORTable 1 }

SysOREntry ::= SEQUENCE {
    sysORIndex     INTEGER,
    sysORID        OBJECT IDENTIFIER,
    sysORDescr     DisplayString,
    sysORUpTime    TimeStamp
}

sysORIndex OBJECT-TYPE
    SYNTAX     INTEGER (1..2147483647)
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
            "The auxiliary variable used for identifying instances of
            the columnar objects in the sysORTable."
    ::= { sysOREntry 1 }

sysORID OBJECT-TYPE
    SYNTAX     OBJECT IDENTIFIER
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "An authoritative identification of a capabilities statement
            with respect to various MIB modules supported by the local
            SNMPv2 entity acting in an agent role."



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    ::= { sysOREntry 2 }

sysORDescr OBJECT-TYPE
    SYNTAX     DisplayString
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "A textual description of the capabilities identified by the
            corresponding instance of sysORID."
    ::= { sysOREntry 3 }

sysORUpTime OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
            "The value of sysUpTime at the time this conceptual row was
            last instanciated."
    ::= { sysOREntry 4 }


-- the SNMP group
--
-- a collection of objects providing basic instrumentation and
-- control of an SNMP entity.

snmp     OBJECT IDENTIFIER ::= { mib-2 11 }

snmpInPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION