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. ii) Reduced bandwidth usage. EIGRP does not send periodic updates as with DV protocols. It sends partial updates upon the route information changes (eg: path, metric).
multi-access networks, eg: Ethernet, Token Ring, FDDI, and all WAN topologies – leased lines, point-to-point links, and non-broadcast multiaccess (NBMA) topologies, eg: X.25, SMDS, ATM, and Frame Relay. - EIGRP has its roots as a distance-vector …
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