ccna3 vlsm

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CCNA 3 Chapter 2

Introduction to Classless Routing

By

Your Name

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Objectives

• VLSM

• RIP version 2

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What Is VLSM and Why Is It Used?

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Wasting Space

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When to Use VLSM?

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Calculating Subnets with VLSM

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Route Aggregation

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Configuring VLSM

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RIP version 2

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RIP History

• RIPv1 has the following limitations:– It does not send subnet mask information in its

updates. – It sends updates as broadcasts on

255.255.255.255. – It does not support authentication. – It is not able to support VLSM or classless

interdomain routing (CIDR).

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RIPv2 Features

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Comparing RIPv1 and RIPv2

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Configuring RIPv2

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Verifying RIPv2

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Troubleshooting RIPv2

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Default Routes

• Default routes — The system administrator manually defines default routes as the path to take when there is no known route to the destination.

• Default routes keep routing tables shorter.