S01:E02
RFC 4271 is a standard that defines the Border Gateway Protocol version 4 (BGP-4), an inter-Autonomous System (AS) routing protocol used to exchange network reachability information between routers. BGP-4 allows systems to advertise a set of destinations as an IP prefix, eliminating the need for the “class” concept. This document outlines how BGP-4 functions, including message formats, path attributes, error handling, state machines, and route selection procedures. It also explores how to control routing traffic overhead and enhance routing information efficiency through aggregation. Additionally, the document delves into security considerations, discusses the use of TCP MD5 authentication, and provides guidance on implementation recommendations and IANA considerations.
Link to RFC