© 2007 Cisco Systems, Inc. All rights reserved. Cisco PublicITE PC v4.0Chapter 1 1

Routing

Working at a Small-to-Medium Business or ISP – Chapter 6

ITE PC v4.0Chapter 1 2© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Objectives Describe the purpose and function of dynamic routing

and the protocols used to implement it.

Configure RIPv2 dynamic routing using the Cisco IOS.

Describe the use of exterior routing protocols across the Internet.

Enable BGP on a customer site router.

ITE PC v4.0Chapter 1 3© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Dynamic Routing and Protocols Describe the purpose and function of routing and the

required protocols used.

ITE PC v4.0Chapter 1 4© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

How Routers use Routes Describe the purpose of destination, mask, gateway,

and metric in a routing table route.

ITE PC v4.0Chapter 1 5© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Static and Default Routes Describe the syntax and function of manually-

configured routes.

ITE PC v4.0Chapter 1 6© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Dynamic Routing and Protocols Compare and contrast the distance vector and link

state protocols and identify common types of each.

ITE PC v4.0Chapter 1 7© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Dynamic Routing and Protocols Describe and compare the RIP, EIGRP and OSPF

routing protocols

ITE PC v4.0Chapter 1 8© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Dynamic Routing and Protocols Describe the routing protocols that are most commonly

deployed in an organization’s network for routing internally.

ITE PC v4.0Chapter 1 9© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Dynamic Routing and Protocols Describe and implement RIP routing on an integrated

router.

ITE PC v4.0Chapter 1 10© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Exterior Routing Protocols Across the Internet Describe an Autonomous System

ITE PC v4.0Chapter 1 11© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Exterior Routing Protocols Across the Internet Describe the difference between interior and exterior

routing protocols

ITE PC v4.0Chapter 1 12© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Exterior Routing Protocols Across the Internet Describe how packets are routed across the Internet

ITE PC v4.0Chapter 1 13© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Exterior Routing Protocols Across the Internet Describe how ISPs use exterior routing protocols to

forward traffic

ITE PC v4.0Chapter 1 14© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Exterior Routing Protocols Across the Internet Implement BGP using a predefined configuration and

verify its operation

ITE PC v4.0Chapter 1 15© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Summary

All routers make routing decisions by looking up information stored in their routing tables.

Routes can be statically assigned by an administrator, or dynamically learned by the router via a routing protocol.

Routing protocols use either distance-vector or link-state algorithms to calculate the best routes to each destination.

Criteria such as ease of management, ease of configuration, and efficiency must be considered when selecting a routing protocol for use within an organization.

Organizations are also called Autonomous Systems.

Between Autonomous Systems, Exterior Gateway routing protocols control the flow of traffic.

ISPs handle Internet traffic through the use of routing policies.

ITE PC v4.0Chapter 1 16© 2007 Cisco Systems, Inc. All rights reserved. Cisco Public