Summary
The Cisco Systems EIGRP is one of the most feature-rich and robust routing protocols to ever be developed. Its unique combination of features blends the best attributes of distance-vector protocols with the best attributes of link-state protocols. The result is a routing protocol that defies easy categorization with conventional protocols.

EIGRP is also remarkably easy to configure and use and is remarkably efficient in operation. It can be used in conjunction with IPv4, AppleTalk, and IPX. More importantly, its architecture will readily enable Cisco to add support for other routed protocols, such as IPv6, in the future.

In this chapter, you learned that EIGRP, a routing protocol developed by Cisco, is an advanced routing protocol that uses the DUAL algorithm. It includes features such as rapid convergence, reduced bandwidth usage, and multiple network-layer support.

You also learned that EIGRP converges rapidly, performs incremental updates, routes IP, IPX, and AppleTalk traffic, and summarizes routes. You learned how to configure and verify EIGRP configuration for various protocols. 

In the next chapter "Routing Optimization," you will learn how to optimize routing operations using static routes, default routes, and route filtering.