CCNP BSCI Official Exam Certification Guide, Fourth Edition

Chapter 3. EIGRP Principles

This chapter covers the following topics:

• EIGRP Features and Advantages—Describes the key features and advantages of EIGRP, including neighborship and reliable incremental updates, neighbor discovery and recovery, the sophisticated metric used by EIGRP, DUAL, and queries.

• Understanding EIGRP Tables—Describes neighbors, topology, and routing tables.

• EIGRP Network Design—Describes the factors that affect the scaling of EIGRP.

Enhanced Interior Gateway Routing Protocol (EIGRP) is a distance vector protocol that uses the same sophisticated metric as IGRP and uses the Diffusing Update Algorithm (DUAL) convergence algorithm. EIGRP is able to converge quickly and use little bandwidth because it—like OSPF—has separate keepalives ...