rfc2580.txt

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Network Working Group                 Editors of this version:
Request for Comments: 2580                                 K. McCloghrie
STD: 58                                                    Cisco Systems
Obsoletes: 1904                                               D. Perkins
Category: Standards Track                                       SNMPinfo
                                                        J. Schoenwaelder
                                                         TU Braunschweig
                                      Authors of previous version:
                                                                 J. Case
                                                           SNMP Research
                                                           K. McCloghrie
                                                           Cisco Systems
                                                                 M. Rose
                                                  First Virtual Holdings
                                                           S. Waldbusser
                                          International Network Services
                                                              April 1999



                    Conformance Statements for SMIv2


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.

Copyright Notice

   Copyright (C) The Internet Society (1999).  All Rights Reserved.


Table of Contents

   1 Introduction .....................................................3
   1.1 A Note on Terminology ..........................................3
   2 Definitions ......................................................3
   2.1 The OBJECT-GROUP macro .........................................3
   2.2 The NOTIFICATION-GROUP macro ...................................4
   2.3 The MODULE-COMPLIANCE macro ....................................5
   2.4 The AGENT-CAPABILITIES macro ...................................7
   3 Mapping of the OBJECT-GROUP macro ...............................10
   3.1 Mapping of the OBJECTS clause .................................10
   3.2 Mapping of the STATUS clause ..................................11
   3.3 Mapping of the DESCRIPTION clause .............................11
   3.4 Mapping of the REFERENCE clause ...............................11



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RFC 2580            Conformance Statements for SMIv2          April 1999


   3.5 Mapping of the OBJECT-GROUP value .............................11
   3.6 Usage Example .................................................12
   4 Mapping of the NOTIFICATION-GROUP macro .........................12
   4.1 Mapping of the NOTIFICATIONS clause ...........................12
   4.2 Mapping of the STATUS clause ..................................13
   4.3 Mapping of the DESCRIPTION clause .............................13
   4.4 Mapping of the REFERENCE clause ...............................13
   4.5 Mapping of the NOTIFICATION-GROUP value .......................13
   4.6 Usage Example .................................................13
   5 Mapping of the MODULE-COMPLIANCE macro ..........................14
   5.1 Mapping of the STATUS clause ..................................14
   5.2 Mapping of the DESCRIPTION clause .............................14
   5.3 Mapping of the REFERENCE clause ...............................15
   5.4 Mapping of the MODULE clause ..................................15
   5.4.1 Mapping of the MANDATORY-GROUPS clause ......................15
   5.4.2 Mapping of the GROUP clause .................................15
   5.4.3 Mapping of the OBJECT clause ................................16
   5.4.3.1 Mapping of the SYNTAX clause ..............................16
   5.4.3.2 Mapping of the WRITE-SYNTAX clause ........................16
   5.4.3.3 Mapping of the MIN-ACCESS clause ..........................16
   5.4.4 Mapping of the DESCRIPTION clause ...........................17
   5.5 Mapping of the MODULE-COMPLIANCE value ........................17
   5.6 Usage Example .................................................17
   6 Mapping of the AGENT-CAPABILITIES macro .........................19
   6.1 Mapping of the PRODUCT-RELEASE clause .........................19
   6.2 Mapping of the STATUS clause ..................................19
   6.3 Mapping of the DESCRIPTION clause .............................20
   6.4 Mapping of the REFERENCE clause ...............................20
   6.5 Mapping of the SUPPORTS clause ................................20
   6.5.1 Mapping of the INCLUDES clause ..............................20
   6.5.2 Mapping of the VARIATION clause .............................20
   6.5.2.1 Mapping of the SYNTAX clause ..............................21
   6.5.2.2 Mapping of the WRITE-SYNTAX clause ........................21
   6.5.2.3 Mapping of the ACCESS clause ..............................21
   6.5.2.4 Mapping of the CREATION-REQUIRES clause ...................22
   6.5.2.5 Mapping of the DEFVAL clause ..............................22
   6.5.2.6 Mapping of the DESCRIPTION clause .........................22
   6.6 Mapping of the AGENT-CAPABILITIES value .......................22
   6.7 Usage Example .................................................23
   7 Extending an Information Module .................................25
   7.1 Conformance Groups ............................................25
   7.2 Compliance Definitions ........................................26
   7.3 Capabilities Definitions ......................................26
   8 Security Considerations .........................................27
   9 Editors' Addresses ..............................................27
   10 References .....................................................28
   11 Full Copyright Statement .......................................29


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RFC 2580            Conformance Statements for SMIv2          April 1999


1.  Introduction

   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 an adapted subset of
   OSI's Abstract Syntax Notation One, ASN.1 (1988) [1], termed the
   Structure of Management Information (SMI) [2].

   It may be useful to define the acceptable lower-bounds of
   implementation, along with the actual level of implementation
   achieved.  It is the purpose of this document to define the notation
   used for these purposes.

1.1.  A Note on Terminology

   For the purpose of exposition, the original Structure of Management
   Information, as described in RFCs 1156 (STD 16), 1212 (STD 16), and
   RFC 1215, is termed the SMI version 1 (SMIv1).  The current version
   of the Structure of Management Information is termed SMI version 2
   (SMIv2).

2.  Definitions

SNMPv2-CONF DEFINITIONS ::= BEGIN

IMPORTS ObjectName, NotificationName, ObjectSyntax
                                               FROM SNMPv2-SMI;

-- definitions for conformance groups

OBJECT-GROUP MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  ObjectsPart
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    ObjectsPart ::=
                  "OBJECTS" "{" Objects "}"
    Objects ::=
                  Object
                | Objects "," Object
    Object ::=


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RFC 2580            Conformance Statements for SMIv2          April 1999


                  value(ObjectName)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

-- more definitions for conformance groups

NOTIFICATION-GROUP MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  NotificationsPart
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    NotificationsPart ::=
                  "NOTIFICATIONS" "{" Notifications "}"
    Notifications ::=
                  Notification
                | Notifications "," Notification
    Notification ::=
                  value(NotificationName)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END


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RFC 2580            Conformance Statements for SMIv2          April 1999


-- definitions for compliance statements

MODULE-COMPLIANCE MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart
                  ModulePart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    Status ::=
                  "current"
                | "deprecated"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    ModulePart ::=
                  Modules
    Modules ::=
                  Module
                | Modules Module
    Module ::=
                  -- name of module --
                  "MODULE" ModuleName
                  MandatoryPart
                  CompliancePart

    ModuleName ::=
                  -- identifier must start with uppercase letter
                  identifier ModuleIdentifier
                  -- must not be empty unless contained
                  -- in MIB Module
                | empty
    ModuleIdentifier ::=
                  value(OBJECT IDENTIFIER)
                | empty

    MandatoryPart ::=
                  "MANDATORY-GROUPS" "{" Groups "}"
                | empty

    Groups ::=


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RFC 2580            Conformance Statements for SMIv2          April 1999


                  Group
                | Groups "," Group
    Group ::=
                  value(OBJECT IDENTIFIER)

    CompliancePart ::=
                  Compliances
                | empty

    Compliances ::=
                  Compliance
                | Compliances Compliance
    Compliance ::=
                  ComplianceGroup
                | Object

    ComplianceGroup ::=
                  "GROUP" value(OBJECT IDENTIFIER)
                  "DESCRIPTION" Text

    Object ::=
                  "OBJECT" value(ObjectName)
                  SyntaxPart
                  WriteSyntaxPart
                  AccessPart
                  "DESCRIPTION" Text

    -- must be a refinement for object's SYNTAX clause
    SyntaxPart ::= "SYNTAX" Syntax
                | empty

    -- must be a refinement for object's SYNTAX clause
    WriteSyntaxPart ::= "WRITE-SYNTAX" Syntax
                | empty

    Syntax ::=    -- Must be one of the following:
                       -- a base type (or its refinement),
                       -- a textual convention (or its refinement), or
                       -- a BITS pseudo-type
                  type
                | "BITS" "{" NamedBits "}"

    NamedBits ::= NamedBit
                | NamedBits "," NamedBit

    NamedBit ::= identifier "(" number ")" -- number is nonnegative

    AccessPart ::=


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RFC 2580            Conformance Statements for SMIv2          April 1999


                  "MIN-ACCESS" Access
                | empty
    Access ::=
                  "not-accessible"
                | "accessible-for-notify"
                | "read-only"
                | "read-write"
                | "read-create"

    -- a character string as defined in [2]
    Text ::= value(IA5String)
END

-- definitions for capabilities statements

AGENT-CAPABILITIES MACRO ::=
BEGIN
    TYPE NOTATION ::=
                  "PRODUCT-RELEASE" Text
                  "STATUS" Status
                  "DESCRIPTION" Text
                  ReferPart
                  ModulePart

    VALUE NOTATION ::=
                  value(VALUE OBJECT IDENTIFIER)

    Status ::=
                  "current"
                | "obsolete"

    ReferPart ::=
                  "REFERENCE" Text
                | empty

    ModulePart ::=
                  Modules
                | empty
    Modules ::=
                  Module
                | Modules Module
    Module ::=
                  -- name of module --
                  "SUPPORTS" ModuleName
                  "INCLUDES" "{" Groups "}"
                  VariationPart

    ModuleName ::=


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RFC 2580            Conformance Statements for SMIv2          April 1999


                  -- identifier must start with uppercase letter
                  identifier ModuleIdentifier
    ModuleIdentifier ::=
                  value(OBJECT IDENTIFIER)
                | empty

    Groups ::=
                  Group