Introduction to Enhanced Interior Gateway Routing Protocol (EIGRP)
Cisco Systems followed the development of IGRP with Enhanced IGRP. Enhanced IGRP combines the characteristics of distance-vector protocols and link-state protocols. EIGRP is commonly referred to as a hybrid routing protocol or an advanced distance-vector routing protocol. EIGRP can be used to route IP, IPX, and AppleTalk traffic. This chapter concentrates on IP routing with EIGRP.
EIGRP uses distance-vector properties to determine the best path to a network, but it uses link-state properties when changes occur or when detecting new neighbors. Like OSPF, EIGRP sends hello packets to find new neighbors and maintain neighbor adjacencies.
Some of the main features of EIGRP when used ...
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