Transcription of Chapter 5 EIGRP - Cisco
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Chapter 5 EIGRP - Cisco
Copyright 2010 Yap Chin Hoong 49 Chapter 5 EIGRP - EIGRP is a Cisco -proprietary hybrid routing protocol that contains features of distance-vector and link-state routing protocols. Some of its features are: i) Rapid convergence. EIGRP uses the Diffusing Update Algorithm (DUAL) to achieve rapid convergence. DUAL not only calculates the best loop-free routes, but also calculates backup routes in advanced before they are actually being needed. An EIGRP router stores all available backup routes for fast react upon network topology changes. If no backup route exists in the routing table, an EIGRP router will query its neighbors until an alternative route is found.
- EIGRP (Enhanced IGRP) provides many enhancement features over IGRP, a traditional DV routing protocol, mainly in convergence properties and operating efficiency. Traditional DV routing protocols send periodic full routing updates, which consume unnecessary bandwidth.
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