RFC 1322 (rfc1322) - Page 1 of 38

A Unified Approach to Inter-Domain Routing

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Network Working Group                                          D. Estrin
Request for Comments:  1322                                          USC
                                                              Y. Rekhter
                                                                     IBM
                                                                 S. Hotz
                                                                     USC
                                                                May 1992


               A Unified Approach to Inter-Domain Routing

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Abstract

   This memo is an informational RFC which outlines one potential
   approach for inter-domain routing in future global internets.  The
   focus is on scalability to very large networks and functionality, as
   well as scalability, to support routing in an environment of
   heterogeneous services, requirements, and route selection criteria.

   Note: The work of D. Estrin and S. Hotz was supported by the National
   Science Foundation under contract number NCR-9011279, with matching
   funds from GTE Laboratories.  The work of Y. Rekhter was supported by
   the Defense Advanced Research Projects Agency, under contract
   DABT63-91-C-0019.  Views and conclusions expressed in this paper are
   not necessarily those of the Defense Advanced Research Projects
   Agency and National Science Foundation.

1.0 Motivation

   The global internet can be modeled as a collection of hosts
   interconnected via transmission and switching facilities.  Control
   over the collection of hosts and the transmission and switching
   facilities that compose the networking resources of the global
   internet is not homogeneous, but is distributed among multiple
   administrative authorities.  Resources under control of a single
   administration form a domain.  In order to support each domain's
   autonomy and heterogeneity, routing consists of two distinct
   components: intra-domain (interior) routing, and inter-domain
   (exterior) routing.  Intra-domain routing provides support for data
   communication between hosts where data traverses transmission and
   switching facilities within a single domain.  Inter-domain routing
   provides support for data communication between hosts where data



Estrin, Rekhter & Hotz
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