rfc2213.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                                        F. Baker
Request for Comments: 2213                              Cisco Systems
Category: Standards Track                                 J. Krawczyk
                                            ArrowPoint Communications
                                                            A. Sastry
                                                       Cisco Systems
                                                      September 1997



      Integrated Services Management Information Base using 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.

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in TCP/IP-based internets.
   In particular, it defines objects for managing the the interface
   attributes defined in the Integrated Services Model.  Comments should
   be made to the Integrated Services Working Group, [e-mail].

Table of Contents

1 The SNMPv2 Network Management Framework ...............    2
1.1 Object Definitions ..................................    2
2 Overview ..............................................    2
2.1 Textual Conventions .................................    2
2.2 Structure of MIB ....................................    3
3 Definitions ...........................................    3
3.2 Interface Attributes Database .......................    6
3.3 Integrated Services Interface Flows Database ........    8
4 Security Considerations ...............................   19
5 Authors' Addresses ....................................   20
6 Acknowledgements ......................................   20
7 References ............................................   20








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1.  The SNMPv2 Network Management Framework

   The SNMPv2 Network Management Framework consists of four major
   components.  They are:

   o    RFC 1441 which defines the SMI, the mechanisms used for
        describing and naming objects for the purpose of
        management.

   o    STD 17, RFC 1213 defines MIB-II, the core set of managed
        objects for the Internet suite of protocols.

   o    RFC 1445 which defines the administrative and other
        architectural aspects of the framework.

   o    RFC 1448 which defines 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

2.1.  Textual Conventions

   Several new data types are introduced as a textual convention in this
   MIB document.  These textual conventions enhance the readability of
   the specification and can ease comparison with other specifications
   if appropriate.  It should be noted that the introduction of the
   these textual conventions has no effect on either the syntax nor the
   semantics of any managed objects.  The use of these is merely an








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   artifact of the explanatory method used.  Objects defined in terms of
   one of these methods are always encoded by means of the rules that
   define the primitive type.  Hence, no changes to the SMI or the SNMP
   are necessary to accommodate these textual conventions which are
   adopted merely for the convenience of readers and writers in pursuit
   of the elusive goal of clear, concise, and unambiguous MIB documents.

2.2.  Structure of MIB

   The MIB is composed of the following sections:
        Integrated Services
             Interface Attributes Table
             Interface Flow Table

3.  Definitions

INTEGRATED-SERVICES-MIB DEFINITIONS ::= BEGIN

    IMPORTS
            MODULE-IDENTITY, OBJECT-TYPE, Counter32,
            Gauge32, Integer32, mib-2                FROM SNMPv2-SMI
            TimeInterval, TEXTUAL-CONVENTION, RowStatus,
            TruthValue                               FROM SNMPv2-TC
            MODULE-COMPLIANCE, OBJECT-GROUP          FROM SNMPv2-CONF
            ifIndex, InterfaceIndex                  FROM IF-MIB;

--  This MIB module uses the extended OBJECT-TYPE macro as
--  defined in [9].

intSrv MODULE-IDENTITY
        LAST-UPDATED "9511030500Z" -- Thu Aug 28 09:04:13 PDT 1997
        ORGANIZATION "IETF Integrated Services Working Group"
        CONTACT-INFO
       "       Fred Baker
       Postal: Cisco Systems
               519 Lado Drive
               Santa Barbara, California 93111
       Tel:    [phone]
       E-Mail: [e-mail]

               John Krawczyk
       Postal: ArrowPoint Communications
               235 Littleton Road
               Westford, Massachusetts 01886
       Tel:    [phone]
       E-Mail: [e-mail]"
    DESCRIPTION
       "The MIB module to describe the Integrated Services



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       Protocol"
    ::= { mib-2 52 }

intSrvObjects          OBJECT IDENTIFIER ::= { intSrv 1 }
intSrvGenObjects       OBJECT IDENTIFIER ::= { intSrv 2 }
intSrvNotifications    OBJECT IDENTIFIER ::= { intSrv 3 }
intSrvConformance      OBJECT IDENTIFIER ::= { intSrv 4 }

-- Textual Conventions
--

    SessionNumber ::= TEXTUAL-CONVENTION
        STATUS   current
        DESCRIPTION
           "The Session  Number  convention  is  used  for
           numbers  identifying  sessions or saved PATH or
           RESV information. It is a number in  the  range
           returned  by  a TestAndIncr variable, having no
           protocol meaning whatsoever but serving instead
           as simple identifier.

           The alternative was a very complex instance  or
           instance object that became unwieldy."
       SYNTAX   INTEGER (0..2147483647)


    Protocol ::= TEXTUAL-CONVENTION
        DISPLAY-HINT "d"
        STATUS   current
        DESCRIPTION
           "The value of the IP Protocol field  of  an  IP
           Datagram  Header.  This identifies the protocol
           layer above IP.  For example, the  value  6  is
           used  for TCP and the value 17 is used for UDP.
           The values of this field are defined in the As-
           signed Numbers RFC."
       SYNTAX   INTEGER (1..255)


    SessionType ::= TEXTUAL-CONVENTION
        STATUS   current
        DESCRIPTION
           "The value of the C-Type field of a Session ob-
           ject,  as  defined  in  the RSVP specification.
           This value  determines  the  lengths  of  octet
           strings  and use of certain objects such as the
           'port' variables. If the C-Type  calls  for  an
           IP6  address, one would expect all source, des-



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           tination, and next/previous hop addresses to be
           16  bytes long, and for the ports to be UDP/TCP
           port numbers, for example."
       SYNTAX   INTEGER (1..255)

    Port ::= TEXTUAL-CONVENTION
        DISPLAY-HINT "d"
        STATUS   current
        DESCRIPTION
           "The value of the UDP or TCP Source or Destina-
           tion  Port field, a virtual destination port or
           generalized port identifier used with the IPSEC
           Authentication Header or Encapsulating Security
           Payload, or other session discriminator.  If it
           is  not  used, the value should be of length 0.
           This pair, when coupled with the  IP  Addresses
           of the source and destination system and the IP
           protocol  field,  uniquely  identifies  a  data
           stream."
       SYNTAX   OCTET STRING (SIZE(2..4))


    MessageSize ::= TEXTUAL-CONVENTION
        DISPLAY-HINT "d"
        STATUS   current
        DESCRIPTION
           "The size of a message in bytes. This  is  used
           to  specify  the  minimum and maximum size of a
           message along an integrated services route."
       SYNTAX   INTEGER (0..'7FFFFFFF'h)


    BitRate ::= TEXTUAL-CONVENTION
        DISPLAY-HINT "d"
        STATUS   current
        DESCRIPTION
           "The rate, in bits/second, that data  may  move
           in  the context.  Applicable contexts minimally
           include the speed of an  interface  or  virtual
           circuit, the data rate of a (potentially aggre-
           gated) data flow, or the data rate to be  allo-
           cated for use by a flow."
       SYNTAX   INTEGER (0..'7FFFFFFF'h)

    BurstSize ::= TEXTUAL-CONVENTION
         DISPLAY-HINT "d"
         STATUS   current
         DESCRIPTION



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           "The number of octets of IP Data, including  IP
           Headers, that a stream may send without concern
           for policing."
        SYNTAX   INTEGER (0..'7FFFFFFF'h)


    QosService ::= TEXTUAL-CONVENTION
         STATUS   current
         DESCRIPTION
           "The class of service in use by a flow."
        SYNTAX   INTEGER {
                   bestEffort (1),         -- Best Effort Service
                   guaranteedDelay (2),    -- Guaranteed Delay
                   controlledLoad (5)      -- Controlled Load
                 }

--      The Integrated Services Interface Attributes Database contains
--      information about resources allocated by resource reservation
--      protocols, such as RSVP and ST-II.


    intSrvIfAttribTable OBJECT-TYPE
        SYNTAX      SEQUENCE OF IntSrvIfAttribEntry
        MAX-ACCESS  not-accessible
        STATUS      current
        DESCRIPTION
           "The reservable attributes of the system's  in-
           terfaces."
       ::= { intSrvObjects 1 }


    intSrvIfAttribEntry OBJECT-TYPE
        SYNTAX      IntSrvIfAttribEntry
        MAX-ACCESS  not-accessible
        STATUS      current
        DESCRIPTION
           "The reservable attributes of  a  given  inter-
           face."
       INDEX { ifIndex }
       ::= { intSrvIfAttribTable 1 }

IntSrvIfAttribEntry ::=
    SEQUENCE {
        intSrvIfAttribAllocatedBits     BitRate,
        intSrvIfAttribMaxAllocatedBits  BitRate,
        intSrvIfAttribAllocatedBuffer   BurstSize,
        intSrvIfAttribFlows             Gauge32,
        intSrvIfAttribPropagationDelay  Integer32,



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        intSrvIfAttribStatus            RowStatus
    }

    intSrvIfAttribAllocatedBits OBJECT-TYPE
        SYNTAX      BitRate
        UNITS       "Bits per second"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "The number of bits/second currently  allocated
           to reserved sessions on the interface."
       ::= { intSrvIfAttribEntry 1 }

    intSrvIfAttribMaxAllocatedBits OBJECT-TYPE
        SYNTAX      BitRate
        UNITS       "Bits per second"
        MAX-ACCESS  read-create
        STATUS      current
        DESCRIPTION
           "The maximum number of bits/second that may  be
           allocated  to  reserved  sessions on the inter-
           face."
       ::= { intSrvIfAttribEntry 2 }


    intSrvIfAttribAllocatedBuffer OBJECT-TYPE
        SYNTAX      BurstSize
        UNITS       "Bytes"
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "The amount of buffer space  required  to  hold
           the simultaneous burst of all reserved flows on
           the interface."
       ::= { intSrvIfAttribEntry 3 }


    intSrvIfAttribFlows OBJECT-TYPE
        SYNTAX      Gauge32
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
           "The number of reserved flows currently  active
           on  this  interface.  A flow can be created ei-
           ther from a reservation protocol (such as  RSVP
           or ST-II) or via configuration information."
       ::= { intSrvIfAttribEntry 4 }




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