Chapter 19
Multi-Area OSPF

THE FOLLOWING ICND2 EXAM TOPICS ARE COVERED IN THIS CHAPTER:

1. 2.0 Routing Technologies
2. 2.2 Compare and contrast distance vector and link-state routing protocols
3. 2.3 Compare and contrast interior and exterior routing protocols
4. 2.4 Configure, verify, and troubleshoot single area and multiarea OSPFv2 for IPv4 (excluding authentication, filtering, manual summarization, redistribution, stub, virtual-link, and LSAs)
5. 2.5 Configure, verify, and troubleshoot single area and multiarea OSPFv3 for IPv6 (excluding authentication, filtering, manual summarization, redistribution, stub, virtual-link, and LSAs)

We’ll begin this chapter by focusing on the scalability constraints of an Open Shortest Path First (OSPF) network with a single area and move on from there to explore the concept of multi-area OSPF as a solution to these scalability limitations.

I’ll also identify and introduce you to the various categories of routers used in multi-area configurations...