Contents
Introductionxviii
Part I Designing Networks2
Chapter 1 Network Design4
What Is Design?5
Design Principles7
Determining Requirements9
Analyzing the Existing Network11
Preparing the Preliminary Design12
Completing the Final Design Development12
Deploying the Network12
Monitoring and Redesigning13
Maintaining Design Documentation13
Modular Network Design14
What Is Modular Design?14
Hierarchical Network Design15
The Cisco Enterprise Composite Network Model18
Summary24
Part II Technologies: What You Need to Know and Why You Need to Know It26
Chapter 2 Switching Design28
Making the Business Case29
Switching Types30
Layer 2 Switching30
Layer 3 Switching33
Spanning-Tree Protocol34
Redundancy in Layer 2 Switched Networks35
STP Terminology and Operation36
Virtual LANs40
VLAN Membership42
Trunks42
STP and VLANs44
VLAN Trunking Protocol45
Inter-VLAN Routing46
Multilayer Switching and Cisco Express Forwarding47
Multilayer Switching47
Cisco Express Forwarding49
Switching Security50
Catalyst Native Security51
Catalyst Hardware Security53
Switching Design Considerations53
Summary55
Chapter 3 IPv4 Routing Design58
Making the Business Case59
IPv4 Address Design60
Determining How Many IP Addresses Are Required61
Using Private and Public Addresses and NAT61
How Routers Use Subnet Masks63
Determining the Subnet Mask to Use64
Hierarchical IP Address Design and Summarization67
Variable-Length Subnet Masks70
IPv4 Routing Protocols74
Classifying Routing Protocols75
Metrics79
Convergence Time80
Route Summarization81
Routing Protocol Comparison82
IPv4 Routing Protocol Selection94
Choosing Your Routing Protocol94
Redistribution, Filtering, and Administrative Distance95
Summary98
Chapter 4 Network Security Design100
Making the Business Case101
Hacking103
Types of Hackers104
Vulnerabilities104
Design Issues105
Human Issues105
Implementation Issues105
Threats106
Reconnaissance Attacks106
Access Attacks106
Information Disclosure Attacks107
Denial of Service Attacks108
Mitigating Technologies111
Threat Defense111
Secure Communication117
Trust and Identity121
Network Security Best Practices124
SAFE Campus Design125
Summary129
Chapter 5 Wireless LAN Design130
Making the Business Case131
Wireless Technology Overview132
Wireless Standards133
Wireless Components135
Wireless Security137
Wireless Security Issues138
Wireless Threat Mitigation138
Wireless Management141
Wireless Design Considerations143
Site Survey143
WLAN Roaming144
Point-to-Point Bridging145
Design Considerations for Wireless IP Phones145
Summary146
Chapter 6 Quality of Service Design148
Making the Business Case149
QoS Requirements for Voice, Data, Video, and Other Traffic151
QoS Models153
IntServ153
DiffServ154
QoS Tools154
Classification and Marking155
Policing and Shaping161
Congestion Avoidance163
Congestion Management164
Link-Specific Tools166
AutoQoS167
QoS Design Guidelines168
Summary170
Chapter 7 Voice Transport Design172
What Is Voice Transport?174
Digitization175
Packetization and Call Processing176
Conversation and Control Traffic177
Quality of Service177
VoIP Components178
IP Telephony Components179
IP Infrastructure179
IP Phones180
Video Telephony181
Call Processing181
Applications181
Voice Gateway182
Voice Coding and Compression Techniques182
Voice Compression182
Voice Activity Detection184
Compressed Real-Time Transport Protocol184
Bandwidth Requirements185
Definitions185
Calculating Trunk Capacity or Bandwidth186
Signaling Traffic Bandwidth188
IP Telephony Design188
Single-Site IP Telephony Design189
Multisite Centralized IP Telephony Design189
Multisite Distributed IP Telephony Design190
Voice Security190
IP Telephony Network Security Concerns191
Platform Security Issues191
Mitigating to Protect IP Telephony192
Summary193
Chapter 8 Content Networking Design196
Making the Business Case197
Content Networking198
Content Caches and Content Engines199
Transparent Caching200
Nontransparent Caching201
Reverse Proxy Caching203
Content Routing204
Direct Mode204
WCCP Mode206
Content Distribution and Management207
Content Switching208
Designing Content Networking209
School Curriculum209
Live Video and Video on Demand for a Corporation210
Summary212
Chapter 9 Network Management Design214
Making the Business Case215
ISO Network Management Standard216
Network Management Protocols and Tools216
Terminology217
SNMP218
MIB218
RMON220
Cisco NetFlow223
Syslog224
CiscoWorks225
Other Tools225
Managing a Network228
Network Management Strategy228
SLCs and SLAs228
IP Service-Level Agreements229
Network Management Design230
Summary232
Chapter 10 Other Enabling Technologies234
IP Multicast235
Internet Group Management Protocol (IGMP) and Cisco Group Management Protocol (CGMP)236
Protocol Independent Multicast (PIM) Routing Protocol237
Increasing Network Availability239
Storage Networking242
IP Version 6244
Summary247
Part III Designing Your Network: How to Apply What You Know250
Chapter 11 Case Study Context: Venti Systems252
Background Information and Context253
Network Requirements After Acquisitions Are Complete257
Summary263
Chapter 12 Case Study Solution: Venti Systems264
Design Model265
Head Office267
Branch Office270
Remote Users271
User Devices272
Servers273
Switching273
Head-Office Switching274
Branch-Office Switching275
Remote User Switching275
Security275
Head-Office Security278
Branch-Office Security281
Remote User Security281
IP Addressing and Routing Protocol281
Head-Office IP Addressing and Routing Protocol281
Branch-Office IP Addressing and Routing Protocol282
Remote User IP Addressing and Routing Protocol283
E-Mail283
Head-Office E-Mail283
Branch-Office E-Mail284
Remote User E-Mail284
QoS and Voice284
Head-Office QoS and Voice284
Branch-Office QoS and Voice288
Remote User QoS and Voice288
Wireless288
Head-Office Wireless288
Branch-Office Wireless288
Remote User Wireless288
Network Management289
Head-Office Network Management289
Branch-Office Network Management291
Remote User Network Management291
Future Considerations291
Summary291
Part IV Appendixes292
Appendix A References294
Appendix B Network Fundamentals300
Appendix C Decimal-Binary Conversion340
Appendix D Abbreviations350
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