Chapter 15. Connecting to Other Autonomous SystemsThe Basics of BGP
This chapter covers the following topics, which you need to understand to pass the CCNP/CCDP/CCIP BSCI exam:
Introduction to BGP and communicating with other autonomous systems
Overview of the BGP operation
Basic configuration commands to connect to another autonomous system
Managing and verifying the BGP configuration
Alternative methods of connecting to another autonomous system
This chapter details Border Gateway Protocol version 4 (BGP-4, referred to throughout this book as BGP). The CCNP/CCDP/CCIP BSCI exam barely scratches the surface of the detail available to this protocol. This chapter deals with the basic concepts and configuration commands of BGP, which are covered in greater complexity in the next chapter. This chapter builds on your understanding of routing within large enterprise networks. The introduction to BGP in this chapter will cover external BGP (eBGP) and familiarize you with the necessary terms and concepts.
This chapter is broken into two major areas. The first part deals with how BGP works theoretically. Implementing and managing a BGP network is described at the end of the chapter.