Network Working Group S. Willis
Request for Comments: 1269 J. Burruss
Wellfleet Communications Inc.
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.
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
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
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.
Willis & Burruss [Page 1]RFC 1269 BGP-3 MIB October 19913. 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) 
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  purposely restricts the ASN.1
constructs which may be used. These restrictions are explicitly made
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 ,
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].
These objects are used to control and manage a BGP [11,12]
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
BGP runs over a reliable transport protocol. This eliminates the
need to implement explicit update fragmentation, retransmission,
Willis & Burruss [Page 2]RFC 1269 BGP-3 MIB October 1991
acknowledgement, and sequencing. Any authentication scheme used by
the transport protocol may be used in addition to BGP's own
The planned use of BGP in the Internet environment, including such
issues as topology, the interaction between BGP and IGPs, and the