1. www.ciscopress.com Copyright 2003 CCNA 3 Chapter 3 Single-Area OSPF By Your Name

2. www.ciscopress.com Copyright 2003 Objectives Link-state routing protocol Single-area OSPF concepts Single-area OSPF configuration

3. www.ciscopress.com Copyright 2003 Overview of Link-State and Distance Vector Routing

4. www.ciscopress.com Copyright 2003 Link-State Routing Features Respond quickly to network changes Send triggered updates only when a network change has occurred Send periodic updates known as link-state refreshes Use a hello mechanism to determine the reachability of neighbors

5. www.ciscopress.com Copyright 2003 How Routing Information Is Maintained

6. www.ciscopress.com Copyright 2003 Link-State Routing Algorithms

7. www.ciscopress.com Copyright 2003 Advantages and Disadvantages of Link-State Routing

8. www.ciscopress.com Copyright 2003 Comparing Distance Vector and Link-State Routing

9. www.ciscopress.com Copyright 2003 Single-Area OSPF Concepts

10. www.ciscopress.com Copyright 2003 OSPF Overview OSPF is becoming the preferred IGP protocol when compared with RIPv1 and RIPv2 because it is scalable.

11. www.ciscopress.com Copyright 2003 OSPF Terminology

12. www.ciscopress.com Copyright 2003 Comparing OSPF with Distance Vector Routing Protocols

13. www.ciscopress.com Copyright 2003 Shortest Path Algorithm The best path is the lowest-cost path.

14. www.ciscopress.com Copyright 2003 OSPF Network Types

15. www.ciscopress.com Copyright 2003 OSPF Hello Protocol

16. www.ciscopress.com Copyright 2003 Steps in the Operation of OSPF

17. www.ciscopress.com Copyright 2003 Single-Area OSPF Configuration

18. www.ciscopress.com Copyright 2003 Configuring the OSPF Routing Process

19. www.ciscopress.com Copyright 2003 Configuring OSPF Loopback Address and Router Priority

20. www.ciscopress.com Copyright 2003 Configuring Router 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.

21. www.ciscopress.com Copyright 2003 Modifying OSPF Cost Metric

22. www.ciscopress.com Copyright 2003 Configuring OSPF Authentication

23. www.ciscopress.com Copyright 2003 Configuring OSPF Timers

24. www.ciscopress.com Copyright 2003 OSPF, Propagating a Default Route

25. www.ciscopress.com Copyright 2003 Common OSPF Configuration Issues

26. www.ciscopress.com Copyright 2003 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

27. www.ciscopress.com Copyright 2003 The debug and clear Commands for OSPF Verification