RFC 2270 (rfc2270) - Page 1 of 6

Using a Dedicated AS for Sites Homed to a Single Provider

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Network Working Group                                          J. Stewart
Request for Comments: 2270                                            ISI
Category: Informational                                          T. Bates
                                                               R. Chandra
                                                                  E. Chen
                                                                    Cisco
                                                             January 1998


       Using a Dedicated AS for Sites  Homed to a Single Provider

Status of this Memo

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

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Abstract

   With the increased growth of the Internet, the number of customers
   using BGP4 has grown significantly. RFC 1930 outlines a set of
   guidelines for when one needs and should use an AS. However, the
   customer and service provider (ISP) are left with a problem as a
   result of this in that while there is no need for an allocated AS
   under the guidelines, certain conditions make the use of BGP4 a very
   pragmatic and perhaps only way to connect a customer homed to a
   single ISP.  This paper proposes a solution to this problem in line
   with recommendations set forth in RFC 1930.

1.  Problems

   With the increased growth of the Internet, the number of customers
   using BGP4 [1],[2] has grown significantly. RFC 1930 [4] outlines a
   set of guidelines for when one needs and should use an AS. However,
   the customer and service provider (ISP) are left with a problem as a
   result of this in that while there is no need for an allocated AS
   under the guidelines, certain conditions make the use of BGP4 a very
   pragmatic and perhaps only way to connect a customer homed to a
   single ISP. These conditions are as follows:

   1) Customers multi-homed to single provider






Stewart, et. al.             Informational
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