Thanks to Brett Bartow for allowing me the opportunity to write for Cisco Press once again,
and to Chris Cleveland for gently reminding me how to write again after a three-year break.
It??™s de?¬?nitely not as easy as riding a bike. Thanks to Ginny Bess for keeping the work
?¬‚owing and dealing with my bad jokes. Also to Tonya Simpson, Patrick Kanouse, and the
rest of the Cisco Press team??”you are the best in the industry.
Thanks to my manager at Cisco, Darrin Thomason, for trusting me to keep all my other
projects managed while working on this project in my spare time (wait, do we have spare
time at Cisco?).
Thanks to my customers, colleagues, and former students. Your questions, comments, and
challenges have helped me continue to learn and helped teach me how to pass that
information to others.
Thanks to my family, for their patience and understanding during this project and all my
projects.
Most importantly, I would like to thank God for giving me the skills, talents, and
opportunity to work in such a challenging and exciting profession.
viii
ix
Contents at a Glance
Foreword xviii
Introduction xix
Chapter 1 Review of Cisco IOS for Routers and Switches 3
Chapter 2 Medium-Sized Switched Network Construction 13
Chapter 3 Medium-Sized Routed Network Construction 97
Chapter 4 Single-Area OSPF Implementation 139
Chapter 5 Implementing EIGRP 171
Chapter 6 Managing Traffic with Access Control Lists 205
Chapter 7 Managing Address Spaces with NAT and IPv6 249
Chapter 8 Extending the Network into the WAN 297
Appendix Answers to Chapter Review Questions 361
Index 368
x
Contents
Foreword xviii
Introduction xix
Chapter 1 Review of Cisco IOS for Routers and Switches 3
Chapter Objectives 3
Cisco IOS CLI Functions 4
Configuration Modes of Cisco IOS Software 4
Help Facilities of the Cisco IOS CLI 6
Commands Review 7
Summary of Cisco IOS CLI Commands 8
Chapter Summary 8
Review Questions 8
Chapter 2 Medium-Sized Switched Network Construction 13
Chapter Objectives 13
Implementing VLANs and Trunks 13
Understanding VLANs 14
VLAN Overview 15
Grouping Business Functions into VLANs 16
Applying IP Address Space in the Enterprise Network 17
Example: Network Design 18
Considering Traffic Source to Destination Paths 20
Voice VLAN Essentials 22
VLAN Operation 23
Understanding Trunking with 802.
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