BGP
This chapter covers 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.
This chapter focuses on how BGP performs its central role as a routing protocol.