Understanding OSPF Network Types and Neighbor Relationships

Explore different OSPF network types, neighbor relationships, DR/BDR election process, influencing election using OSPF priority, and sample OSPF design with WAN interfaces. Learn about OSPF neighbor requirements and best show/debug commands for troubleshooting OSPF networks.

• OSPF
• Network Types
• Neighbor Relationships
• DR/BDR Election
• WAN Interfaces

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Presentation Transcript

1. CCNA 200-301, Volume I Chapter 21 OSPF Network Types and Neighbors

2. Objectives OSFP Network Types OSPF Neighbor Relationships

3. The OSPF Broadcast Network Type

4. R1 OSPF Configuration

5. R1s List of Neighbors

6. OSPF DR/BDR/DROther Roles in the Network

7. Router R1 OSPF Interfaces: Local Role and Neighbor Counts

8. Displaying OSPF Network Type Broadcast

9. Influencing DR/BDR Election Using OSPF Priority

10. Results of a Completely New DR/BDR Election

11. Sample OSPF Design with Serial and Ethernet WAN

12. OSPF Network Type Point-to-Point on an Ethernet WAN Interface on R1

13. OSPF Network Type Point-to-Point on an Ethernet WAN Interface on R1

14. Neighbor Requirements for OSPF

15. OSPF Neighbor Requirements and the Best show/debug Commands

16. Problems That Prevent OSPF Neighbors on the Central LAN

17. Setting Area 1 on R2s Interfaces, When They Should Be in Area 0

18. Comparing OSPF Router IDs on R1 and R3

19. Finding Mismatched Hello/Dead Timers

20. OSPF Process Shutdown

21. Shutting Down an OSPF Process, and the Resulting Neighbor States