Chapter 6. Understanding Enhanced Interior Gateway Routing Protocol (EIGRP)

This chapter covers the following key topics about Enhanced IGRP (EIGRP):

• Metrics

• EIGRP neighbor relationships

• The Diffusing Update Algorithm (DUAL)

• DUAL finite-state machine

• EIGRP reliable transport protocol

• EIGRP packet format

• EIGRP behavior

• EIGRP summarization

• EIGRP query process

• Default routes and EIGRP

• Unequal-cost load balancing in EIGRP

As the size of network grows larger, you can see that the classical distance vector routing protocols such as IGRP and RIP won’t scale to the needs of the network. Some of the biggest scalability problems of IGRP and RIP are as follows:

• Full periodic routing updates that consume bandwidth—RIP sends out its ...

Get Troubleshooting IP Routing Protocols now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial