O'Reilly logo

CCNA Routing and Switching Portable Command Guide, Third Edition by Scott Empson

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 9. Single-Area OSPF

This chapter provides information and commands concerning the following topics:

Configuring OSPF

Using wildcard masks with OSPF areas

Loopback interfaces

Router ID

DR/BDR elections

Modifying cost metrics

Authentication: Simple

Authentication: Using MD5 encryption

Timers

Propagating a default route

Verifying OSPF configuration

Troubleshooting OSPF

Configuration example: Single area OSPF

Configuring OSPF

Image

Using Wildcard Masks with OSPF Areas

When compared to an IP address, a wildcard mask identifies which addresses get matched for placement into an area:

A 0 (zero) in a wildcard mask means ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required