Border Gateway Protocol

Border Gateway
Protocol
THE CCNP EXAM TOPICS COVERED IN THIS
CHAPTER INCLUDE THE FOLLOWING:


Understand how BGP operates.


Understand how to configure and verify BGP.
Up to this point we’ve covered how routing occurs within an
autonomous system (intra-AS routing). We have yet to cover how
routing occurs between different autonomous systems (inter-AS
routing). That is the focus of the next two chapters.
In this chapter, you’ll be introduced to the concept of
Exterior Gateway Protocols (EGPs)
.
We’re going to concentrate our focus on the Border Gateway Protocol. The early part of this
chapter primarily consists of the theory of BGP operation such as the history, the difference
between iBGP and eBGP, neighbor relationships, and route selection. We’ll then show how to
implement BGP in its most basic form. Enabling BGP, configuring neighbors, and injecting
routes are all explained. We also cover how to verify BGP’s operation and troubleshoot it if it
isn’t operating properly. You will learn the
show
commands and the
debug
commands that can
be used to verify and troubleshoot BGP operation. Chapter 9, “Advanced Border Gateway Protocol,”
covers the more in-depth concepts of BGP.

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