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
Autorentext
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.
Inhalt
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…