This chapter covers the following topics, which you need to understand to pass the CCNP/CCDP/CCIP BSCI exam:
Required configuration commands for a multiarea OSPF network
Optional configuration commands for a multiarea OSPF network
A working configuration of OSPF on a multiarea network
Verifying the configuration of OSPF in a multiarea network
Troubleshooting a multiarea OSPF network
The topics in this chapter describe the configuration of the routing protocol OSPF across multiple areas. This chapter assumes your knowledge of Chapter 6, "Using OSPF in a Single Area," and Chapter 7, "Configuring OSPF in a Single Area," which dealt with OSPF configuration in a single area, and Chapter 8, "Using OSPF Across Multiple Areas," which introduced you to using OSPF in multiple areas. This chapter builds on your understanding and explains the configuration of OSPF over a large multiarea network. You will learn how to implement and manage an OSPF network in a real environment, one of multiple areas.
Some of the commands in this chapter are the same as those needed in the configuration of OSPF in a single area, in particular the required commands and the verification and troubleshooting commands. This chapter briefly reconsiders the OSPF commands required for configuration in order to put the multiarea commands in context. This chapter concentrates on the configuration of a multiarea environment.