Routing first-step

No routing experience required Includes clear and easily understood explanations Makes learning easy Your first step to understanding routing begins here!

Learn routing basics simply and easily Explore how network traffic gets from here to there Understand routing tools and technologies Reinforce your understanding with chapter review questions Welcome to the world of routing!

Routing is the technology that enables worldwide Internet communication. Many people involved with networking technologies or companies need to know how routing works. But learning about routing tends to involve a complex web of terms and acronyms-a language that can be difficult and unfamiliar.

No routing experience needed!

Routing First-Step explains the basics of Internet routing in language all of us can understand. This book takes you on a guided tour of routing, starting with systems you are familiar with: the postal system, the telephone system, and the interstate highway system. From there, you'll learn routing simply and easily. Whether you are looking to take your first step into a career in networking or are interested only in gaining knowledge of the technology, this book is for you!

Author Notes

Bill Parkhurst is an advisory engineer at Cisco Systems and a technical advisor for Cisco certifications. Bill has taught networking to students on five continents at all levels, from beginner to advanced. Before joining Cisco, Bill taught networking at Wichita State University and now has the pleasure of working with many of his former students

Introduction	p. xiv
Chapter 1 Routing and Switching in Everyday Life	p. 3
Postal System	p. 3
Package Protocol	p. 6
Addressing Protocol	p. 6
Mail Delivery Protocol	p. 8
Local Delivery	p. 9
Local Off-Street Delivery	p. 15
Citywide Delivery	p. 18
Statewide Delivery	p. 21
Countrywide Delivery	p. 23
Highway System	p. 29
Telephone System	p. 33
Summary	p. 36
Chapter Review Questions	p. 36
Chapter 2 A[subscript 16] B[subscript 16] C[subscript 16], As Easy As 01[subscript 2], 10[subscript 2], 11[subscript 2]	p. 39
Decimal Numbering System	p. 39
Binary Numbering System	p. 40
Octal Numbering System	p. 44
Hexadecimal Numbering System	p. 45
Dotted Decimal Notation	p. 47
Conversions Between Number Systems	p. 47
Binary to Octal	p. 48
Binary to Hexadecimal	p. 48
Binary to Decimal	p. 49
Binary to Dotted Decimal	p. 49
Octal to Binary	p. 50
Octal to Hexadecimal	p. 51
Octal to Decimal	p. 51
Octal to Dotted Decimal	p. 51
Hexadecimal to Binary	p. 52
Hexadecimal to Octal	p. 52
Hexadecimal to Decimal	p. 53
Hexadecimal to Dotted Decimal	p. 54
Decimal to Binary	p. 54
Decimal to Octal	p. 56
Decimal to Hexadecimal	p. 56
Fun Binary Number Facts	p. 57
Summary	p. 60
Chapter Review Questions	p. 61
Chapter 3 Internet Addressing and Routing	p. 63
Internet Addressing	p. 63
Internet Addressing Protocol	p. 68
Classful IP Addresses	p. 72
Private IP Addresses	p. 74
Address Resolution	p. 75
Intra-LAN Communication	p. 77
Inter-LAN Communication	p. 81
IP Header Format	p. 85
TCP/IP Layered Protocol Model	p. 90
Classless Internet Addressing	p. 94
IP Routing and Route Summarization	p. 105
Supernets	p. 113
IP Version 4 and IP Version 6	p. 113
IPv6 Address Format	p. 116
IPv6 Address Types	p. 117
Summary	p. 118
Chapter Review Questions	p. 118
References	p. 119
Chapter 4 Routing IP	p. 123
Delivering Snail Mail and E-Mail-Any Difference?	p. 124
Basic IP Router Configuration	p. 125
Routing Information Protocol Version 1	p. 130
Counting to Infinity	p. 136
Split Horizon	p. 137
Poison Reverse	p. 138
Convergence	p. 139
Variable-Length Subnet Masks	p. 142
Hop Count Limitation	p. 146
RIPv1 Algorithm	p. 147
RIP Version 2	p. 150
Security	p. 153
Route Summarization	p. 155
Summary	p. 160
Chapter Review Questions	p. 161
References	p. 163
Chapter 5 Cisco Interior Gateway Protocols	p. 165
Introducing IGRP	p. 165
IGRP Metrics	p. 168
IGRP Limitations	p. 171
Introducing EIGRP	p. 174
EIGRP Neighbor Discovery	p. 174
Basic EIGRP Configuration	p. 175
EIGRP Metrics	p. 178
EIGRP Route Update Algorithm	p. 179
EIGRP Network Summarization	p. 186
Comparing IGRP and EIGRP	p. 189
Summary	p. 190
Chapter Review Questions	p. 191
References	p. 192
Chapter 6 Open Shortest Path First-Better, Stronger, Faster	p. 195
OSPF Areas	p. 196
Link States	p. 198
OSPF Router ID	p. 201
Basic OSPF Configuration	p. 203
OSPF Neighbor Discovery	p. 209
OSPF Timers	p. 212
OSPF Metrics	p. 213
OSPF Router Types	p. 214
OSPF Route Types	p. 217
OSPF Area Types	p. 219
Stub Area	p. 220
Totally Stubby Area	p. 221
Not-So-Stubby Area (NSSA)	p. 222
Totally Not-So-Stubby Area	p. 226
OSPF External Route Summarization	p. 227
OSPF Route Summarization	p. 229
OSPF Virtual Links	p. 230
Selecting the Shortest Path	p. 234
OSPF LSA Types	p. 238
Summary	p. 239
Chapter Review Questions	p. 240
References	p. 242
Chapter 7 Intermediate System-to-Intermediate System-Better, Stronger, Faster, and Scarier	p. 245
Comparing IS-IS and IP Networks	p. 245
IS-IS Areas	p. 249
IS-IS Link States	p. 254
Basic Single Area IS-IS Configuration	p. 256
IS-IS Metrics	p. 261
IS-IS Multiple Area Configuration	p. 264
IS-IS Route Summarization	p. 270
Route Leaking	p. 272
Comparing IS-IS and OSPF	p. 273
Summary	p. 274
Chapter Review Questions	p. 275
References	p. 276
Chapter 8 Border Gateway Protocol-The Glue That Holds the Internet Together	p. 279
Understanding the Need for BGP	p. 280
BGP Attributes	p. 282
Autonomous System Path Attribute-AS_PATH	p. 284
WEIGHT Attribute	p. 287
Local Preference Attribute-LOCAL_PREF	p. 288
Metric or MULTI_EXIT_DISC (MED) Attribute	p. 289
ORIGIN Attribute	p. 290
NEXT_HOP Attribute	p. 291
Community Atribute	p. 292
Basic BGP Configuration-EBGP	p. 294
Advertising IP Prefixes	p. 298
Using the network Command to Inject Routes	p. 299
Using Redistribution to Inject Routes	p. 305
Using BGP to Inject Routes	p. 307
Basic BGP Configuration-IBGP	p. 309
IBGP and Loopback Interfaces	p. 320
Scaling IBGP	p. 323
Route Reflector	p. 324
Confederations	p. 325
BGP Route Summarization	p. 328
BGP Decision Process	p. 332
Summary	p. 333
Chapter Review Questions	p. 333
References	p. 334
Chapter 9 Multicast-What the Post Office Can't Do	p. 337
Comparing Unicast and Multicast Routing	p. 337
Multicast Switching	p. 340
IGMP	p. 343
CGMP	p. 345
IGMP Snooping	p. 346
Multicast Forwarding	p. 346
Protocol Independent Multicast Routing Protocol	p. 349
PIM Dense Mode	p. 349
PIM Sparse Mode	p. 353
Static RP	p. 355
Auto-RP	p. 356
PIM SM Version 2	p. 357
Anycast RP	p. 359
Reserved Multicast Addresses	p. 362
Summary	p. 362
Chapter Review Questions	p. 363
References	p. 364
Appendix A Answers to Chapter Review Questions	p. 367
Glossary	p. 393
Index	p. 403

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