Cisco Certified Expert

Fundamental BGP Operations

Chapters 12 and 13 of this book cover what might be the single most important topic on both the CCIE Routing and Switching written and lab exams—Border Gateway Protocol (BGP) Version 4. This chapter focuses on how BGP accomplishes its fundamental tasks:

1. Forming neighbor relationships

2. Injecting routes into BGP from some other source

3. Exchanging those routes with other routers

4. Placing routes into IP routing tables

All of these BGP topics have close analogies with those of BGP's IGP cousins, but of course there are many differences in the details.

While this chapter focuses on how BGP performs its central role as a routing protocol, Chapter 13, "BGP Routing Policies," moves on to cover routing policies—the methods used with BGP to limit or change how BGP filters routes and chooses the best routes among multiple routes to the same prefix.

0 0