1. Introduction

   The purpose of this memo is to document how the requirements for
   publication of a routing protocol as an Internet Draft Standard have
   been satisfied by Border Gateway Protocol version 4 (BGP-4).

   This report satisfies the requirement for "the second report", as
   described in Section 6.0 of [RFC1264].  In order to fulfill the
   requirement, this report augments [RFC1773] and describes additional
   knowledge and understanding gained in the time between when the
   protocol was made a Draft Standard and when it was submitted for
   Standard.