1 © 2003, Cisco Systems, Inc. All rights reserved. CCNA 3 v3.0 Module 1 Introduction to Classless Routing

222 © 2003, Cisco Systems, Inc. All rights reserved. Objectives VLSM RIP version 2

333 © 2003, Cisco Systems, Inc. All rights reserved. What Is VLSM and Why Is It Used?

444 © 2003, Cisco Systems, Inc. All rights reserved. A Waste of Space

555 © 2003, Cisco Systems, Inc. All rights reserved. When to Use VLSM?

666 © 2003, Cisco Systems, Inc. All rights reserved. Calculating Subnets with VLSM

777 © 2003, Cisco Systems, Inc. All rights reserved. A Working VLSM Example

888 © 2003, Cisco Systems, Inc. All rights reserved. Route Aggregation

999 © 2003, Cisco Systems, Inc. All rights reserved. Route Summarization

10 © 2003, Cisco Systems, Inc. All rights reserved. Configuring VLSM

11 © 2003, Cisco Systems, Inc. All rights reserved. RIP History RIPv1 has the following limitations: It does not send subnet mask information in its updates. It sends updates as broadcasts on It does not support authentication. It is not able to support VLSM or classless interdomain routing (CIDR).

12 © 2003, Cisco Systems, Inc. All rights reserved. RIPv2 Features

13 © 2003, Cisco Systems, Inc. All rights reserved. Comparing RIPv1 and RIPv2

14 © 2003, Cisco Systems, Inc. All rights reserved. Configuring RIPv2

15 © 2003, Cisco Systems, Inc. All rights reserved. Verifying the RIP Configuration

16 © 2003, Cisco Systems, Inc. All rights reserved. Displaying the IP Routing Table

17 © 2003, Cisco Systems, Inc. All rights reserved. Troubleshooting RIPv2 The debug ip rip Command

18 © 2003, Cisco Systems, Inc. All rights reserved. Troubleshooting RIPv2 The debug ip rip Outputs and Meanings

19 © 2003, Cisco Systems, Inc. All rights reserved. Configuring Default Route