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Software Defined Networks and Network Function Vitualization Simplified

A Visual Guide to Understanding Software Defined Networks and Network Function Virtualization

By CCNA Doherty, Jim

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Format: Paperback, 320 pages
Other Information: illustrations
Published In: United States, 02 March 2016
A Visual Guide to Understanding Software Defined Networks and Network Function Virtualization The simple, visual, at-a-glance guide to SDN and NFV: Core concepts, business drivers, key technologies, and more! SDN (Software Defined Networks) and NFV (Network Function Virtualization) are today's hottest areas of networking. Many executives, investors, sales professionals, and marketers need a solid working understanding of these technologies, but most books on the subject are written specifically for network engineers and other technical experts. SDN and NFV Simplified fills that gap, offering highly visual, "at-a-glance" explanations of SDN, NFV, and their underlying virtualizations. Built around an illustrated, story-telling approach, this answers the questions: Why does this technology matter? How does it work? Where is it used? What problems does it solve? Through easy, whiteboard-style infographics, you'll learn: how virtualization enables SDN and NFV; how datacenters are virtualized through clouds; how networks can also be virtualized; and how to maximize security, visibility, and Quality of Experience in tomorrow's fully-virtualized environments. Step by step, you'll discover why SDN and NFV technologies are completely redefining both enterprise and carrier networks, and driving the most dramatic technology migration since IP networking. That's not all: You'll learn all you need to help lead this transformation. * Learn how virtualization establishes the foundation for SDN and NFV * Review the benefits of VMs, the role of hypervisors, and the management of virtual resources * Discover how cloud technologies enable datacenter virtualization * Understand the roles of networking gear in virtualized datacenters * See VMWare VMotion and VXLAN at work in the virtualized datacenter * Understand multitenancy and the challenges of "communal living" * Learn how core network functions and appliances can be virtualized * Ensure performance and scalability in virtualized networks * Compare modern approaches to network virtualization, including OpenFlow, VMWare Nicera, Cisco Inseieme, and OpenStack * Walk through the business case for SDN, NFV, and the Cloud * Discover how the Software Defined Network (SDN) solves problems previously left unaddressed * Understand SDN controllers-and who's fighting to control your network * Use SDN and NFV to improve integration and say goodbye to "truck rolls" * Enforce security, avoid data leakage, and protect assets through encryption * Provide for effective monitoring and consistent Quality of Experience (QoE) * Learn how SDN and NFV will affect you-and what's next

Table of Contents

Introduction xiii Part 1 Virtualization 101: The Basics of Virtualization 1 Chapter 1 Primer on Virtualization 3 Server Proliferation, Massive Power Bills, and Other IT Nightmares 3 How Servers Work 6 How VMs Fix the Underutilized Server Problem 7 Enter the Hypervisor 8 Why Are Virtual Machines Such a Big Deal? 10 Chapter 2 Benefits of Virtual Machines 13 Reduced Cost 13 Less Space (Even More Cost Savings) 15 Availability and Flexibility 15 Faster Application Spin-Up and Provisioning 16 Easier Access for Development 17 Believe the Hype! 18 Chapter 3 Hypervisors (VMWare, KVM, and Others) 21 An Operating System for Operating Systems 21 A Virtual Machine Monitor 22 Types of Hypervisors 22 Hypervisor Vendors 24 KVM 24 Xen 25 VMware ESXi 26 Microsoft Hyper-V 26 Choosing a Hypervisor 27 Summary 27 Chapter 4 Managing Virtual Resources 29 What Is a Workload? 30 Managing Virtual Resources in the Hypervisor 31 Virtual Resource Providers and Consumers 33 So How Do You Manage Virtual Resources? 34 Part 2 Virtualization 201: Virtualizing the Data Center (a.k.a. Clouds) 37 Chapter 5 Virtualized Data Centers (Some Call Them Clouds) 39 Benefits of Virtualizing the Data Center 39 Less Heat Buildup 39 Reduced Hardware Spend 40 Faster Deployment 40 Testing and Development 40 Faster Redeploy 40 Easier Backups 40 Disaster Recovery 41 Server Standardization 41 Separation of Services 41 Easier Migration to the Cloud 41 Is It a Cloud Yet? 41 The Five Cloud Attributes 42 On-Demand Self-Service 43 Ubiquitous Network Access 43 Pay Per Use 43 Rapid Elasticity 43 Location-Independent Resource Pooling 44 Types of Clouds 44 Software as a Service 44 Infrastructure as a Service 45 Platform as a Service 47 Cloud Deployment Models 48 Private Clouds 48 Shared Multitenant Clouds 48 Public Clouds 48 Hybrid Clouds 48 Chapter 6 Virtual Machine Connectivity 53 Networking in Traditional Data Centers 53 Virtualized Data Center Design 55 Addressing with Virtual Machines 56 Chapter 7 Networking Gear in Virtualized Data Centers 61 The Evolution of Data Center Switching 61 Cloud and Data Center Layout and Architecture 63 Virtualized Aware Network Switches 65 Chapter 8 VMware, VSphere, VMotion, and VXLAN 67 VMware Product Design 67 vSphere 68 VMotion 69 VXLAN 70 VXLAN Tunnel Endpoints 71 Summary 72 Chapter 9 Multitenancy and the Problems of Communal Living 73 SaaS Multitenancy 73 Pros and Cons of SaaS Multitenancy 75 IaaS Multitenancy 76 Pros and Cons of IaaS Multitenancy 77 Part 3 Network Functions Virtualized: Why Stop With Servers? 81 Chapter 10 How Do You Virtualize a Network? 83 Network Virtualization 83 How Does This Fit with NFV and SDN? 84 Server Virtualization 85 Network Virtualization 85 Network Functions Virtualization 85 Software-Defined Networking 85 Virtualizing the Network 86 Chapter 11 Virtualizing Appliances 89 Layer 4 Through 7 Network Services 89 Firewalls 90 VPNs 90 SSL Offload 90 Load Balancer 90 Fighting Virtualization with Virtualization 91 What's the "So What"? 92 Chapter 12 Virtualizing Core Networking Functions 93 Virtualization Recap 93 Where Core Functions Are Being Virtualized 95 Chapter 13 What About Scalability and Performance? 99 Scalability Versus Performance 99 Performance in Network Virtualization 100 Scalability and Performance in Virtual Networks 100 Scalability and Performance for Virtual Appliances 101 Scalability and Performance of Virtualized Networks 102 Summary 102 Part 4 Modern Networking Approaches to Virtualization 105 Chapter 14 From Consumers to Creators 107 The Emergence of SaaS 108 Cloud Business Consumer-Creators 109 Chapter 15 OpenFlow 113 OpenFlow History 114 How OpenFlow Works 115 Chapter 16 VMware Nicira 119 VMware NSX 120 Network Virtualization with NSX 120 How VMware Leverages Nicira (NSX) 121 Chapter 17 Cisco Insieme 125 Cisco's Hybrid SDN Solution 125 Cisco SDN and Insieme 126 Chapter 18 OpenStack 129 Applications on Modern Networks 129 Part 5 Software Defined Networks 135 Chapter 19 The Evolution of the Data Center Network 137 Networks Worked Great, Until They Didn't 138 Traditional Data Center Design Goals 139 High Availability 139 Low Latency 139 Scalability 139 Security 139 The Cost Model Explodes 140 How We Got Here 141 Chapter 20 What's Wrong with the Network We Have? 143 A Brief Review of Networking 144 Control Planes and Forwarding Planes 145 The Cost of Complexity 145 Decoupling Networking Applications from Networking Gear 147 Chapter 21 How SDN Works 149 Understanding SDN 149 The Application Layer 151 The Control Layer 152 The Infrastructure Layer 152 A Programmable Network 152 So What's the "So What?" 153 Chapter 22 The Economic Impact of SDN, NFV, and the Cloud 157 Winners in SDN, NFV, and the Cloud 157 How the "Little Guy" Wins 157 How Large Enterprises Win with SDN, NFV, and the Cloud 160 Losers in the Cloud 163 The Economic Value of Increased Innovation 164 Part 6 SDN Controllers 167 Chapter 23 SDN Controllers 169 Centralized Control 169 Commercial Versus Open Source Controllers 170 Network Virtualization 171 viii SDN and NFV Simplified Chapter 24 The OpenDaylight Project 175 How the ODL Architecture Works 177 The ODL Controller Platform 178 Chapter 25 The Fight to Control Your Network 181 Separation of Internal Controls 181 You Can See It, But Who Controls It? 184 Chapter 26 What's the Business Case for SDN? 187 SDN Use Case Examples 188 Data Center Optimization 189 Network Access Control 189 Network Virtualization 189 Virtual Customer Edge 189 Dynamic Interconnects 189 Virtual Core and Aggregation 189 Summary 190 Part 7 Virtualized Networks 193 Chapter 27 Goodbye Truck Rolls 195 Data Center Scale 195 A New Maintenance Philosophy 198 Summary 199 Chapter 28 What If the Shoe Doesn't Fit? 201 Where SDN Does Not Fit 202 When Should You Adopt SDN? 202 Stuck in the Middle 203 Chapter 29 Service Chaining 205 Service Chaining in SDN 206 Chapter 30 NFV: What Happens to All the Network Appliances? 209 How Network Appliances Are Different 209 Replacing Big Hardware Appliances with Many Small Virtual Appliances 210 When Not to Get Rid of an Appliance 211 Part 8 Security 213 Chapter 31 Where's My Data, Exactly? 215 Storage Virtualization 215 Storage-Area Networks 216 Data Location and Security 217 So What Are the Nontechnical Issues That We Need to Address? 218 Summary 219 Chapter 32 Preventing Data Leakage 223 Minimizing Data Loss 224 Data Loss Prevention 225 Chapter 33 Logging and Auditing 229 Where Logging Matters 231 Summary 233 Chapter 34 Encryption in Virtual Networks 235 Data in Motion 235 Data at Rest 236 Key Management 238 Best Practices 238 Chapter 35 Everything Old Is Now New Again 241 How We Got Here 241 The Mainframe Model 241 The Personal Computer Model 241 The Networked Model 242 The Internet Model 242 Grid Computing Model 242 Cloud Computing Model 242 What We Have Learned 242 Retro Security Considerations 244 Recycled Ideas on Mobile and Web Apps 245 Part 9 Visibility 247 Chapter 36 Overlay Networks 249 MPLS: The Original Virtual Network 249 Virtual Layer 2 Designs 250 Enter SDN 252 Common Encapsulation Techniques 252 Chapter 37 Network Management Tools 255 What's in the Tool Bag? 256 Tapping In 256 Gaining Visibility 257 Chapter 38 Quality of Experience 261 Deep Packet Inspection 263 Chapter 39 Monitoring Traffic Between Virtual Switches 265 Getting VM Visibility 265 Monitoring VM-to-VM traffic 266 How VxLANs Work 267 Creating a "Visibility Layer" 267 Part 10 The Big Picture 269 Chapter 40 Pulling It All Together 271 Why the Network Had to Change 271 How SDN and NFV Tie Together 273 SDN's Downside: A Loss of Visibility 274 SDN Orchestration 274 Chapter 41 How SDN and NFV Will Affect You 277 Operational Domains 278 Mobility Virtualization 278 Virtual CPE and Service Chaining 278 NFV and Service Orchestration 278 WAN Optimization and Innovation 278 Network Optimization 278 Policy-Driven Application Provisioning and Delivery 279 SDN Use Cases 279 Network Access Control 279 Network Virtualization 279 Data Center Optimization 279 Direct Inter-Connects 279 Embracing SDN and NFV 279 Chapter 42 What's Next in Networking? 283 Separate but Complementary 283 Virtual Customer Premise Equipment 284 SDN and NFV Working Together 285 Summary 286 TOC, 9780134306407, 2/15/16

About the Author

Jim Doherty has more than 17 years of engineering and marketing experience across a broad range of networking, security, and technology companies. Focusing on technology strategy, product positioning, and marketing execution, Jim has held leadership positions for Cisco Systems, Certes Networks, Ixia, and Ericsson Mobile. Currently, he is the SVP of Sales and Marketing for Percona. Doherty is also the creator and co-author of the Networking Simplified series of books, which includes Cisco Networking Simplified, Home Networking Simplified, and several other titles. He has also written books on mobile security and other networking topics. Jim is a former U.S. Marine Corps Sergeant and holds a Bachelor of Science degree in electrical engineering from North Carolina State University and an MBA from Duke University. Jim lives in Raleigh, North Carolina, with his wife and two children.

EAN: 9780134306407
ISBN: 0134306406
Publisher: Addison-Wesley Educational Publishers Inc
Dimensions: 25.15 x 20.32 x 1.52 centimetres (0.50 kg)
Age Range: 15+ years
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