ccna 3 v3.0 module 2 single-area ospf

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1 © 2003, Cisco Systems, Inc. All rights reserved. CCNA 3 v3.0 Module 2 Single-Area OSPF

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CCNA 3 v3.0 Module 2 Single-Area OSPF. Objectives. Link-state routing protocol Single - area OSPF concepts Single - area OSPF configuration. Overview of Link-State and Distance Vector Routing. Link-State Routing Features. How Routing Information Is Maintained. - PowerPoint PPT Presentation

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Page 1: CCNA 3 v3.0 Module 2  Single-Area OSPF

1© 2003, Cisco Systems, Inc. All rights reserved.

CCNA 3 v3.0 Module 2 Single-Area OSPF

Page 2: CCNA 3 v3.0 Module 2  Single-Area OSPF

222© 2003, Cisco Systems, Inc. All rights reserved.

Objectives

• Link-state routing protocol

• Single-area OSPF concepts

• Single-area OSPF configuration

Page 3: CCNA 3 v3.0 Module 2  Single-Area OSPF

333© 2003, Cisco Systems, Inc. All rights reserved.

Overview of Link-State and Distance Vector Routing

Page 4: CCNA 3 v3.0 Module 2  Single-Area OSPF

444© 2003, Cisco Systems, Inc. All rights reserved.

Link-State Routing Features

Page 5: CCNA 3 v3.0 Module 2  Single-Area OSPF

555© 2003, Cisco Systems, Inc. All rights reserved.

How Routing Information Is Maintained

Page 6: CCNA 3 v3.0 Module 2  Single-Area OSPF

666© 2003, Cisco Systems, Inc. All rights reserved.

Link-State Routing Protocol Algorithms

Page 7: CCNA 3 v3.0 Module 2  Single-Area OSPF

777© 2003, Cisco Systems, Inc. All rights reserved.

Advantages and Disadvantages of Link-State Routing

Page 8: CCNA 3 v3.0 Module 2  Single-Area OSPF

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

OSPF Overview

OSPF is becoming the preferred IGP protocol when compared with RIPv1 and RIPv2 because it is scalable.

Page 9: CCNA 3 v3.0 Module 2  Single-Area OSPF

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

OSPF Terminology

Page 10: CCNA 3 v3.0 Module 2  Single-Area OSPF

101010© 2003, Cisco Systems, Inc. All rights reserved.

More OSPF Terminology

Page 11: CCNA 3 v3.0 Module 2  Single-Area OSPF

111111© 2003, Cisco Systems, Inc. All rights reserved.

Shortest Path Algorithm

The best path is the lowest-cost path.

Page 12: CCNA 3 v3.0 Module 2  Single-Area OSPF

121212© 2003, Cisco Systems, Inc. All rights reserved.

OSPF Network Types

Page 13: CCNA 3 v3.0 Module 2  Single-Area OSPF

131313© 2003, Cisco Systems, Inc. All rights reserved.

OSPF Hello Protocol

Page 14: CCNA 3 v3.0 Module 2  Single-Area OSPF

141414© 2003, Cisco Systems, Inc. All rights reserved.

Steps in the Operation of OSPF

Discover neighbors

Page 15: CCNA 3 v3.0 Module 2  Single-Area OSPF

151515© 2003, Cisco Systems, Inc. All rights reserved.

Steps in the Operation of OSPF

Elect DR and BDR on Multi Access Network

Page 16: CCNA 3 v3.0 Module 2  Single-Area OSPF

161616© 2003, Cisco Systems, Inc. All rights reserved.

Steps in the Operation of OSPF

Selecting the Best Route

Page 17: CCNA 3 v3.0 Module 2  Single-Area OSPF

171717© 2003, Cisco Systems, Inc. All rights reserved.

Basic OSPF Configuration

Page 18: CCNA 3 v3.0 Module 2  Single-Area OSPF

181818© 2003, Cisco Systems, Inc. All rights reserved.

Basic OSPF Configuration

Page 19: CCNA 3 v3.0 Module 2  Single-Area OSPF

191919© 2003, Cisco Systems, Inc. All rights reserved.

Configuring OSPF Loopback Address and Router Priority

Page 20: CCNA 3 v3.0 Module 2  Single-Area OSPF

202020© 2003, Cisco Systems, Inc. All rights reserved.

Setting OSPF Priority

The priorities can be set to any value from 0 to 255. A value of 0 prevents that router from being elected. A router with the highest OSPF priority will win the election for DR.

Page 21: CCNA 3 v3.0 Module 2  Single-Area OSPF

212121© 2003, Cisco Systems, Inc. All rights reserved.

Modifying OSPF Cost Metric

Page 22: CCNA 3 v3.0 Module 2  Single-Area OSPF

222222© 2003, Cisco Systems, Inc. All rights reserved.

Configuring OSPF Authentication

Page 23: CCNA 3 v3.0 Module 2  Single-Area OSPF

232323© 2003, Cisco Systems, Inc. All rights reserved.

Configuring OSPF Timers

Page 24: CCNA 3 v3.0 Module 2  Single-Area OSPF

242424© 2003, Cisco Systems, Inc. All rights reserved.

OSPF - Propagating a Default Route

Router(config-router)# default-information originate [always]

Page 25: CCNA 3 v3.0 Module 2  Single-Area OSPF

252525© 2003, Cisco Systems, Inc. All rights reserved.

Common OSPF Configuration Issues

Page 26: CCNA 3 v3.0 Module 2  Single-Area OSPF

262626© 2003, Cisco Systems, Inc. All rights reserved.

Verifying OSPF Configuration

• show ip protocol

• show ip route

• show ip ospf interface

• shop ip ospf

• show ip ospf neighbor detail

• show ip ospf database

Page 27: CCNA 3 v3.0 Module 2  Single-Area OSPF

272727© 2003, Cisco Systems, Inc. All rights reserved.

The debug and clear Commands for OSPF Verification