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Routing Protocols

Routing Protocols. Heng Sovannarith heng_sovannarith@yahoo.com. Introduction. Routing protocols were created for routers. These protocols have been designed to allow the exchange of routing tables, or known networks, between routers.

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Routing Protocols

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  1. Routing Protocols Heng Sovannarithheng_sovannarith@yahoo.com

  2. Introduction • Routing protocols were created for routers. These protocols have been designed to allow the exchange of routing tables, or known networks, between routers. • There are a lot of different routing protocols, each one designed for specific network sizes.

  3. Type of Routing • Two main types of routing: • Static routing • Dynamic routing

  4. Routing Protocol • The router learns about remote networks from neighbor routers or from an administrator. • The router then builds a routing table. If the network is directly connected then the router already knows how to get to the network. If the networks are not attached, the router must learn how to get to the remote network with either static routing (administrator manually enters the routes in the router's table) or dynamic routing (happens automatically using routing protocols like EIGRP,OSPF,etc.).

  5. Routing Protocol • Only Dynamic routing uses routing protocols, which enable routers to: • Dynamically discover and maintain routes • Calculate routes • Distribute routing updates to other routers • Reach agreement with other routers about the network topology • Statically programmed routers are unable to find  routes, or send routing information to other routers. They send data over routes defined by the network Admin.

  6. Routing Protocol • Dynamic Routing Protocols • Distance Vector • Link State • Hybrid • Distance Vector routers find the best path from information send from neighbors • Link State routers each have a copy of the entire network map • Link State routers find best routes from this local map

  7. Routing Protocol • Routing Protocol • Distance Vector • RIP v1, • RIP v2 • IGRP • Link State • OSPF • Hybrid • EIGRP

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