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EIGRP for IP: Basic Operation and Configuration by Don Slice, Alvaro Retana, Russ White

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1 EIGRP Fundamentals

Cisco’s EIGRP (Enhanced Interior Gateway Routing Protocol) is an advanced distance vector protocol based on DUAL (Diffusing Update Algorithm). In this book, we will explain EIGRP’s operation, explore network design, and cover troubleshooting for common problems.

Just in the first paragraph, we’ve introduced concepts that need clarification; we’ve said EIGRP is enhanced and advanced. In this first chapter, we’ll try to clarify these concepts by covering the fundamental workings of EIGRP, keeping in mind that this book has been designed to provide quick answers to common configurations and problems rather than an in-depth study of the protocol. To put EIGRP in perspective, we will first briefly discuss the operation of two ...

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