Chapter 4 Routing Textbook

Chapter 4 Routing Textbook - Distance Vector Routing...

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© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public 1 Version 4.0 Distance Vector Routing Protocols Routing Protocols and Concepts – Chapter 4
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2 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Objectives Identify the characteristics of distance vector routing protocols. Describe the network discovery process of distance vector routing protocols using Routing Information Protocol (RIP). Describe the processes to maintain accurate routing tables used by distance vector routing protocols. Identify the conditions leading to a routing loop and explain the implications for router performance. Recognize that distance vector routing protocols are in use today.
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3 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols Examples of Distance Vector routing protocols : Routing Information Protocol (RIP) Interior Gateway Routing Protocol (IGRP) Enhanced Interior Gateway Routing Protocol (EIGRP)
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4 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols Distance Vector Technology - the Meaning of Distance Vector A router using distance vector routing protocols knows 2 things: Distance to final destination Vector, or direction, traffic should be directed
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5 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols Characteristics of Distance Vector routing protocols : Periodic updates Neighbors Broadcast updates Entire routing table is included with routing update
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6 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols Routing Protocol Algorithm : Defined as a procedure for accomplishing a certain task
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7 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols Routing Protocol Characteristics Criteria used to compare routing protocols includes Time to convergence Scalability Resource usage Implementation & maintenance
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8 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Distance Vector Routing Protocols
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9 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Network Discovery Router initial start up (Cold Starts) Initial network discovery Directly connected networks are initially placed in routing table
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10 © 2007 Cisco Systems, Inc. All rights reserved. Cisco Public Network Discovery Initial Exchange of Routing Information If a routing protocol is configured
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Chapter 4 Routing Textbook - Distance Vector Routing...

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