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Campus Network Design Fundamentals

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This is the eBook version of the printed book (published December 2005).
  • Description
  • Sample Content
  • Updates
  • Copyright 2006
  • Dimensions: 7-3/8" x 9-1/8"
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 1-58705-282-2
  • ISBN-13: 978-1-58705-282-8

The all-in-one guide to modern routed and switched campus network design 

  • Understand the network design process and network design models
  • Learn how switches are used in network design
  • Design an IP addressing plan and select appropriate IP routing protocols
  • Apply network security design principles to boost network security
  • Enable WLANs to improve workforce mobility
  • Examine QoS design requirements and tools
  • Unleash the power of voice transport over data networks, including VoIP and IP telephony
  • Use content networking to provide content to users quickly and efficiently
  • Learn how to integrate network management protocols and tools into network designs
  • Understand how to effectively integrate IP multicast, high availability, storage networking, and IPv6 into your network designs

Over the past decade, campus network design has evolved many times as new technologies have emerged and business needs have changed. For enterprises to take advantage of cost-saving, productivity-enhancing solutions, such as IP telephony and content networking, their core infrastructures must include the key enabling technologies required by these solutions and provide a resilient, secure foundation that can scale to business needs. As with any architecture, designing a solid foundation is the first step.

Campus Network Design Fundamentals is an all-in-one guide to key technologies that can be integrated into network design. The book provides insight into why each technology is important and how to apply this knowledge to create a campus network that includes as many or as few of today’s productivity-enhancing applications as are needed in your environment. Topics covered throughout the book include network design process and models, switching, IP routing, quality of service (QoS), security, wireless LANs (WLANs), voice transport, content networking, network management, IPv6, IP multicast, increasing network availability, and storage networking. Sample network designs are included through-out, and the book concludes with a comprehensive case study that illustrates the design process and solutions for headquarters, branch offices, and home office/remote users.

Whether you need an overview of modern campus technologies or seek advice on how to design switched and routed networks that securely support these technologies, this book is your comprehensive resource to the foundations upon which all modern-day campus networks are based.

This book is part of the Cisco Press® Fundamentals Series. Books in this series introduce networking professionals to new networking technologies, covering network topologies, example deployment concepts, protocols, and management techniques.

Table of Contents



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


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


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


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


Convergence Time80

Route Summarization81

Routing Protocol Comparison82

IPv4 Routing Protocol Selection94

Choosing Your Routing Protocol94

Redistribution, Filtering, and Administrative Distance95


Chapter 4       Network Security Design100

Making the Business Case101


Types of Hackers104


Design Issues105

Human Issues105

Implementation Issues105


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


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


Chapter 6       Quality of Service Design148

Making the Business Case149

QoS Requirements for Voice, Data, Video, and Other Traffic151

QoS Models153



QoS Tools154

Classification and Marking155

Policing and Shaping161

Congestion Avoidance163

Congestion Management164

Link-Specific Tools166


QoS Design Guidelines168


Chapter 7       Voice Transport Design172

What Is Voice Transport?174


Packetization and Call Processing176

Conversation and Control Traffic177

Quality of Service177

VoIP Components178

IP Telephony Components179

IP Infrastructure179

IP Phones180

Video Telephony181

Call Processing181


Voice Gateway182

Voice Coding and Compression Techniques182

Voice Compression182

Voice Activity Detection184

Compressed Real-Time Transport Protocol184

Bandwidth Requirements185


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


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


Chapter 9       Network Management Design214

Making the Business Case215

ISO Network Management Standard216

Network Management Protocols and Tools216





Cisco NetFlow223



Other Tools225

Managing a Network228

Network Management Strategy228

SLCs and SLAs228

IP Service-Level Agreements229

Network Management Design230


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


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


Chapter 12     Case Study Solution: Venti Systems264

Design Model265

Head Office267

Branch Office270

Remote Users271

User Devices272



Head-Office Switching274

Branch-Office Switching275

Remote User Switching275


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


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


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


Part IV Appendixes292

Appendix A    References294

Appendix B    Network Fundamentals300

Appendix C    Decimal-Binary Conversion340

Appendix D    Abbreviations350


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