This chapter explains the Enhanced Interior Gateway Routing Protocol (EIGRP) concepts and technologies. These concepts are common to all three protocol families supported by EIGRP (IP, IPX, and AppleTalk) and are covered in several sections:
"Introduction to EIGRP" compares EIGRP to other routing protocols.
"Initial IP EIGRP Configuration" documents the basic commands needed to start IP EIGRP in the Cisco IOS.
"EIGRP Concepts" explains EIGRP Metrics and Distances.
"DUAL—The Heart of EIGRP" describes the core algorithm of EIGRP.
EIGRP data structures, protocols, and advanced concepts are covered in Chapter 2, "Advanced EIGRP Concepts, Data Structures, and Protocols." The IPX EIGRP and AppleTalk EIGRP configurations ...