New Training: Fundamentals of EIGRP

In this 11-video skill, CBT Nuggets trainer Keith Barker teaches you about routing concepts regarding EIGRP, including path selection, metrics, and load balancing. Watch this new Cisco training.

Learn Cisco with one of these courses:

• Cisco CCNP Enterprise Core

• Cisco CCNP Enterprise Advanced Routing and Services

• Cisco EIGRP Configuration

This training includes:

• 11 videos

• 1.3 hours of training

You’ll learn these topics in this skill:

• Intro to EIGRP

• EIGRP Overview

• EIGRP Vocabulary (The beginning…)

• Reported-Advertised BW and Delay Information

• Backup Routes Concepts

• Feasible Successor (Backup Route) Lab

• Unequal Cost Proportional Load Balancing

• Passive Interface

• Metric Calculation

• Summary Routes

• EIGRP Review

What is Enhanced Interior Gateway Routing Protocol (EIGRP)?

Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco Interior Gateway Protocol (IGF) that is used to find the optimal route through an IP network. Unlike OSPF (Open Shortest Path First), which uses Dijkstra's Shortest Path First (SPF) algorithm to find the shortest route based on its cost, EIGRP uses DUAL (Diffuse Update Algorithm) to calculate the best route based on a formula that, by default, takes into account bandwidth and delay. Though it can also use load, reliability and MTU (maximum transmission unit) in its calculation.

EIGRP is less computationally intensive than OSPF, because it doesn't recompute all routes every time a change occurs within an area. It instead updates routes using triggered and incremental updates.

On the other hand, OSPF can scale better than EIGRP, which can become complex to manage in large networks when it comes to troubleshooting issues. OSPF is also more of an open standard.