Chapter 5

RIP version 1

CIS 82 Routing Protocols and Concepts

Rick Graziani

Cabrillo College

graziani@cabrillo.edu

Last Updated: 3/10/2008

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Note

This presentation will be updated prior to March. 25, 2008

The audio of the lecture for this presentation will be available on my web site after March. 25, 2008

My web site is www.cabrillo.edu/~rgraziani.

For access to these PowerPoint presentations and other materials, please email me at graziani@cabrillo.edu.

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For further information

This presentation is an overview of what is covered in the curriculum/book.

For further explanation and details, please read the chapter/curriculum.

Book:

Routing Protocols and Concepts

By Rick Graziani and Allan Johnson

ISBN: 1-58713-206-0

ISBN-13: 978-58713-206-3

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Topics

RIPv1: Distance Vector, Classful Routing Protocol

Background and Perspective

RIPv1 Characteristics and Message Format

RIP Operation

Basic RIPv1 Configuration

RIPv1 Scenario A

Enable RIP: router rip Command

Specifying Networks

Verification and Troubleshooting

Verifying RIP: show ip route

Verifying RIP: show ip protocols

Verifying RIP: debu ip rip

Passive Interfaces

Automatic Summarization Modified Topology B Boundary Routers and

Automatic Summarization

Processing RIP Updates Sending RIP Updates Advantages and

Disadvantages of Automatic Summarization

Default Route and RIPv1 Modified Topology C Propagating the Default Route

in RIPv1

RIPv1: A Distance Vector,

Classful Routing Protocol

Background and Perspective

RIPv1 Characteristics and Message Format

RIP Operation

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RIPv1: Distance Vector, Classful Routing Protocol

The first protocol used was Routing Information Protocol (RIP).

RIP still popular: simple and widespread support.

Why learn RIP?

Still in use today.

Help understand fundamental concepts and comparisons of protocols

such as classful (RIPv1) and classless (RIPv2)

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Background and Perspective

RIP is not a protocol “on the way out.” In fact, an IPv6 form of RIP called RIPng (next generation) is now

available..

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Background and

Perspective

Charles Hedrick wrote RFC 1058 in 1988, in which he documented the existing protocol and specified some improvements.

RFC 1058 can be found at http://www.ietf.org/rfc/rfc1058.txt

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RIPv1 Characteristics and Message Format

Note:

The first version of RIP is often called RIPv1 to distinguish it from RIP version 2 (RIPv2).

However, both versions share many of the same features. When discussing features common to both versions, we will refer to RIP. When discussing features unique to each version, we will use RIPv1 and RIPv2.

RIPv2 is discussed in Chapter 7.

RIP characteristics:

Distance vector routing protocol.

Metric: hop count

Advertised routes with hop counts greater than 15 are considered unreachable.

Response messages (routing table updates) are broadcast every 30 seconds. (RIPv2 uses multicasts)

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RIPv1 Characteristics and Message Format

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