Chapter 10. Multi-Area OSPF

This chapter provides information and commands concerning the following topics:

▪ Configuring multi-area OSPF

▪ Passive interfaces

▪ Route summarization

▪ Inter-area summarization

▪ External route summarization

▪ Configuration example: Multi-area OSPF

Configuring Multi-Area OSPF

Image

Note

You can enable OSPF directly on an interface with the ip ospf process ID area area number command. Because this command is configured directly on the interface, it takes precedence over the network area command entered in router configuration mode.

Tip

If you have problems determining which wildcard mask to use to place your interfaces ...

Get CCNA Routing and Switching Portable Command Guide, Third Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial