| This chapter covers the following topics, which you need to understand to pass the CCNP/CCDP/CCIP BSCI exam: This chapter covers the Enhanced Interior Gateway Routing Protocol (EIGRP) in detail. Although EIGRP has the capability of supporting IP, AppleTalk, and IPX, the BSCI exam will deal with only the mechanics of the IP routing protocol. This chapter expands on your understanding of routing within large enterprise networks, which was covered in Chapter 8, "Using OSPF Across Multiple Areas." This chapter deals with how EIGRP works theoretically. The operation of EIGRP, some of the options available, and design considerations are explained in this chapter, particularly in reference to scaling EIGRP and its use over a nonbroadcast multiaccess (NBMA) WAN environment. The topics in this chapter directly reflect questions on the BSCI exam. EIGRP is designed for use in large networks. As a proprietary routing protocol for Cisco, it is therefore an obligatory subject in a Cisco exam on IP routing protocols. | 