chap3 - Introduction to Dynamic Routing Protocol Routing...

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© 2007 Cisco Systems, Inc. All rights reserved.Cisco PublicITE PC v4.0Chapter 11Introduction to Dynamic Routing ProtocolRouting Protocols and Concepts – Chapter 3Modified by Tony Chen10/03/2008
ITE PC v4.0Chapter 12© 2007 Cisco Systems, Inc. All rights reserved.Cisco PublicNotes:If you see any mistake on my PowerPoint slides or if you have any questions about the materials, please feel free to email me at [email protected].Thanks! Tony ChenCollege of DuPageCisco Networking Academy
ITE PC v4.0Chapter 13© 2007 Cisco Systems, Inc. All rights reserved.Cisco PublicObjectivesDescribe the role of dynamic routing protocols and place these protocols in the context of modern network design.Identify several ways to classify routing protocols. Describe how metrics are used by routing protocols and identify the metric types used by dynamic routing protocols.Determine the administrative distance of a route and describe its importance in the routing process.Identify the different elements of the routing table.
ITE PC v4.0Chapter 14© 2007 Cisco Systems, Inc. All rights reserved.Cisco PublicDynamic Routing ProtocolsDynamic routing protocols are usually used in larger networks to ease the administrative and operational overhead of using only static routes. Typically, a network uses a combination of both a dynamic routing protocol and static routes.
ITE PC v4.0Chapter 15© 2007 Cisco Systems, Inc. All rights reserved.Cisco PublicThe Evolution of Dynamic Routing Protocols One of the earliest routing protocols was Routing Information Protocol (RIP). RIP has evolved into a newer version RIPv2. However, The newer version of RIP still does not scale to larger network implementations. To address the needs of larger networks, two advanced routing protocols were developed: Open Shortest Path First (OSPF) and Intermediate System-to-Intermediate System (IS-IS). Cisco developed Interior Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP), which also scales well in larger network implementations.Additionally, there was the need to interconnect different internetworks and provide routing among them. Border Gateway Routing (BGP) protocol is now used between ISPs as well as between ISPs and their larger private clients to exchange routing information.With the advent of numerous consumer devices using IP, the IPv4 addressing space is nearly exhausted. Thus IPv6 has emerged. To support the communication based on IPv6, newer versions of the IP routing protocols have been developed (see the IPv6 row in the table).

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