O'Reilly logo

CCNP Quick Reference Sheets Bundle: Exams 642-901, 642-812, 642-845, 642-825 by Jay Swan, Denise Donohue, Brent Stewart

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 2. EIGRP

Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco proprietary classless routing protocol that uses a complex metric based on bandwidth and delay. The following are some features of EIGRP:

  • Fast convergence

  • Support for VLSM

  • Partial updates conserve network bandwidth

  • Support for IP, AppleTalk, and IPX

  • Support for all layer 2 (data link layer) protocols and topologies

  • Sophisticated metric that supports unequal-metric proportional load-balancing

  • Use of multicasts (and unicasts where appropriate) instead of broadcasts

  • Support for authentication

EIGRP Overview

EIGRP’s function is controlled by four key technologies:

  • Neighbor discovery and maintenance—Uses periodic hello messages

  • The Reliable Transport Protocol (RTP)—Controls sending, ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required