rfc1269.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                                          S. Willis
Request for Comments: 1269                                    J. Burruss
                                           Wellfleet Communications Inc.
                                                            October 1991

                     Definitions of Managed Objects
              for the Border Gateway Protocol (Version 3)

Status of this Memo

   This memo is an extension to the SNMP MIB.  This RFC specifies an IAB
   standards track protocol for the Internet community, and requests
   discussion and suggestions for improvements.  Please refer to the
   current edition of the "IAB Official Protocol Standards" for the
   standardization state and status of this protocol.  Distribution of
   this memo is unlimited.

1.  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 Border Gateway
   Protocol [11,12].

2.  The Network Management Framework

   The Internet-standard Network Management Framework consists of three
   components.  They are:

      RFC 1155 which defines the SMI, the mechanisms used for describing
      and naming objects for the purpose of management.  RFC 1212
      defines a more concise description mechanism, which is wholly
      consistent with the SMI.

      RFC 1156 which defines MIB-I, the core set of managed objects for
      the Internet suite of protocols.  RFC 1213, defines MIB-II, an
      evolution of MIB-I based on implementation experience and new
      operational requirements.

      RFC 1157 which defines the SNMP, the protocol used for network
      access to managed objects.

   The Framework permits new objects to be defined for the purpose of
   experimentation and evaluation.







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3.  Objects

   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) [7]
   defined in the SMI.  In particular, each object has a name, a syntax,
   and an encoding.  The name is an object identifier, an
   administratively assigned name, which specifies an object type.  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 OBJECT
   DESCRIPTOR, to also refer to the object type.

   The syntax of an object type defines the abstract data structure
   corresponding to that object type.  The ASN.1 language is used for
   this purpose.  However, the SMI [3] purposely restricts the ASN.1
   constructs which may be used.  These restrictions are explicitly made
   for simplicity.

   The encoding of an object type is simply how that object type is
   represented using the object type's syntax.  Implicitly tied to the
   notion of an object type's syntax and encoding is how the object type
   is represented when being transmitted on the network.

   The SMI specifies the use of the basic encoding rules of ASN.1 [8],
   subject to the additional requirements imposed by the SNMP.

3.1.  Format of Definitions

   Section 5 contains contains the specification of all object types
   contained in this MIB module.  The object types are defined using the
   conventions defined in the SMI, as amended by the extensions
   specified in [9,10].

4.  Overview

   These objects are used to control and manage a BGP [11,12]
   implementation.

   The Border Gateway Protocol (BGP) is an inter-Autonomous System
   routing protocol.  The primary function of a BGP speaking system is
   to exchange network reachability information with other BGP systems.
   This network reachability information includes information on the
   full path of Autonomous Systems that traffic must transit to reach
   these networks.

   BGP runs over a reliable transport protocol.  This eliminates the
   need to implement explicit update fragmentation, retransmission,



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   acknowledgement, and sequencing.  Any authentication scheme used by
   the transport protocol may be used in addition to BGP's own
   authentication mechanisms.

   The planned use of BGP in the Internet environment, including such
   issues as topology, the interaction between BGP and IGPs, and the
   enforcement of routing policy rules is presented in a companion
   document [12].

   Apart from a few system variables, this MIB is broken into two
   tables: the BGP Peer Table and the BGP Received Path Attribute Table.
   The Peer Table reflects information about BGP peer connections, such
   as their state and current activity.  The Received Path Attribute
   Table contains all attributes received from all peers before local
   routing policy has been applied.  The actual attributes used in
   determining a route are a subset of the received attribute table.

5.  Definitions

               RFC1269-MIB DEFINITIONS ::= BEGIN

               IMPORTS
                    NetworkAddress, IpAddress, Counter
                         FROM RFC1155-SMI
                    mib-2
                         FROM RFC1213-MIB
                  OBJECT-TYPE
                         FROM RFC-1212
                    TRAP-TYPE
                         FROM RFC-1215;

               -- This MIB module uses the extended OBJECT-TYPE macro as
               -- defined in [9], and the TRAP-TYPE macro as defined
               -- in [10].

               bgp     OBJECT IDENTIFIER ::= { mib-2 15 }

               bgpVersion OBJECT-TYPE
                    SYNTAX OCTET STRING
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "Vector of supported BGP protocol version
                         numbers. Each peer negotiates the version from
                         this vector.  Versions are identified via the
                         string of bits contained within this object.
                         The first octet contains bits 0 to 7, the
                         second octet contains bits 8 to 15, and so on,



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                         with the most significant bit referring to the
                         lowest bit number in the octet (e.g., the MSB
                         of the first octet refers to bit 0).  If a bit,
                         i, is present and set, then the version (i+1)
                         of the BGP is supported."
                    ::= { bgp 1 }

               bgpLocalAs OBJECT-TYPE
                    SYNTAX INTEGER (0..65535)
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The local autonomous system number."
                    ::= { bgp 2 }

               bgpPeerTable OBJECT-TYPE
                    SYNTAX SEQUENCE OF BgpPeerEntry
                    ACCESS not-accessible
                    STATUS mandatory
                    DESCRIPTION
                         "The bgp peer table."
                    ::= { bgp 3 }

               bgpIdentifier OBJECT-TYPE
                    SYNTAX IpAddress
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The BGP Identifier of local system."
                    ::= { bgp 4 }

               bgpPeerEntry OBJECT-TYPE
                    SYNTAX BgpPeerEntry
                    ACCESS not-accessible
                    STATUS mandatory
                    DESCRIPTION
                         "Information about a BGP peer connection."
                    INDEX
                         { bgpPeerRemoteAddr }
                        ::= { bgpPeerTable 1 }

               BgpPeerEntry ::= SEQUENCE {
                    bgpPeerIdentifier
                         IpAddress,
                    bgpPeerState
                         INTEGER,
                    bgpPeerAdminStatus
                         INTEGER,



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                    bgpPeerNegotiatedVersion
                         INTEGER,
                    bgpPeerLocalAddr
                         IpAddress,
                    bgpPeerLocalPort
                         INTEGER,
                    bgpPeerRemoteAddr
                         IpAddress,
                    bgpPeerRemotePort
                         INTEGER,
                    bgpPeerRemoteAs
                         INTEGER,
                    bgpPeerInUpdates
                         Counter,
                    bgpPeerOutUpdates
                         Counter,
                    bgpPeerInTotalMessages
                         Counter,
                    bgpPeerOutTotalMessages
                         Counter,
                    bgpPeerLastError
                         OCTET STRING
                    }

               bgpPeerIdentifier OBJECT-TYPE
                    SYNTAX IpAddress
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The BGP Identifier of this entry's BGP peer."
                    ::= { bgpPeerEntry 1 }

               bgpPeerState OBJECT-TYPE
                    SYNTAX INTEGER {
                         idle(1),
                         connect(2),
                         active(3),
                         opensent(4),
                         openconfirm(5),
                         established(6)
                    }
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The bgp peer connection state. "
                    ::= { bgpPeerEntry 2 }





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               bgpPeerAdminStatus OBJECT-TYPE
                    SYNTAX INTEGER
                    ACCESS read-write
                    STATUS mandatory
                    DESCRIPTION
                         "The desired state of the BGP connection. A
                         transition from 'stop' to 'start' will cause
                         the BGP Start Event to be generated. A
                         transition from 'start' to 'stop' will cause
                         the BGP Stop Event to be generated. This
                         parameter can be used to restart BGP peer
                         connections.  Care should be used in providing
                         write access to this object without adequate
                         authentication."
                    ::= { bgpPeerEntry 3 }

               bgpPeerNegotiatedVersion OBJECT-TYPE
                    SYNTAX INTEGER
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The negotiated version of BGP running between
                         the two peers. "
                    ::= { bgpPeerEntry 4 }

               bgpPeerLocalAddr OBJECT-TYPE
                    SYNTAX IpAddress
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The local IP address of this entry's BGP
                         connection."
                    ::= { bgpPeerEntry 5 }

               bgpPeerLocalPort OBJECT-TYPE
                    SYNTAX INTEGER (0..65535)
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The local port for the TCP connection between
                         the BGP peers."
                    ::= { bgpPeerEntry 6 }

               bgpPeerRemoteAddr OBJECT-TYPE
                    SYNTAX IpAddress
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION



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                         "The remote IP address of this entry's BGP
                         peer."
                    ::= { bgpPeerEntry 7 }

               bgpPeerRemotePort OBJECT-TYPE
                    SYNTAX INTEGER (0..65535)
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The remote port for the TCP connection between
                         the BGP peers.  Note that the objects
                         bgpLocalAddr, bgpLocalPort, bgpRemoteAddr and
                         bgpRemotePort provide the appropriate reference
                         to the standard MIB TCP connection table."
                    ::= { bgpPeerEntry 8 }

               bgpPeerRemoteAs OBJECT-TYPE
                    SYNTAX INTEGER (0..65535)
                    ACCESS read-only
                    STATUS mandatory
                    DESCRIPTION
                         "The remote autonomous system number."
                    ::= { bgpPeerEntry 9 }