Pieter-Jan Nefkens is a long-term Dutch-based IT and network consultant. From early on in his career he has been connecting devices and people, even before the Internet era. Pieter-Jan started his career immediately as an entrepreneur in IT with expertise in networking, security, virtualization, and active software development. Throughout his 20+ years of experience as a consultant, he has always been on top of new trends and technologies and applied them through implementation projects and consultancy to solve specific business problems of his customers, varying from small companies to large international operating enterprises. Pieter-Jan firmly believes that you can only consult and apply technologies if you have used them yourself. Pieter-Jan has always had a strong and close relationship with Cisco since the start of his career, resulting in his participation in beta tests and early field trials, often being one of the first to deploy a new network technology.Sharing and applying new technology is in the DNA of Pieter-Jan, which resulted in his becoming a Cisco Champion since 2017. Besides networking consultancy, Pieter-Jan also participated in standardization processes for inland shipping across Europe.Over the past years, Pieter-Jan has been working for both the Dutch government as well as his own consultancy company.

• Introduction xxPart I Overview of Intent-Based Networking 1Chapter 1 Classic Campus Network Deployments 3Campus Design Fundamentals 4Wireless Networks 10Design Choices 15Summary 20Chapter 2 Why Change Current Networks? A Need for Change 23Wireless/Mobility Trends 23Connected Devices (IoT/Non-User Operated Devices) 26Complexity 28Manageability 29Cloud (Edge) 30(Net)DevOps 32Digitalization 35Summary 36Chapter 3 Enterprise Architecture 37What Is an Architecture Framework? 37The TOGAF® Standard 39Enterprise Architectures 48Summary 49Chapter 4 Cisco Digital Network Architecture 51Requirements 51Cisco DNA Design Concept 56Design Principles 60Common Design Principles 68Overview of Cisco Solutions 73Summary 74Chapter 5 Intent-Based Networking 77What Is Intent? 78Intent-Based Networking Perspective 80Intent-Based Networking Designs 83Summary 91Two Designs 93Chapter 6 Tools for Intent 95What Is Network Automation? 95Network Automation Tools 97Network Analytics 111Application Behavior Analytics 112Network Analytics Tools 113Summary 119Network Automation 119Network Analytics 120Part II Transforming to an Intent-Based Network 123Chapter 7 Phase One: Identifying Challenges 129Challenges in Day-to-Day Operations 129Inventory 132Level of Standardization 134Maturity Level of an Organization 138Stakeholders 141Prioritize 142Action Plan 143Summary 145Chapter 8 Phase Two: Prepare for Intent 147Matching Requirements 148Standardization of Campus Configuration 155Introducing Assurance/Visibility 162Introducing Automation 166Risks of This Phase 174Summary 176Chapter 9 Phase Three: Design, Deploy, and Extend 179Lab Environment 179Which Technology? 181Deploy a Baseline 187Convert to Intents 200Extend Intent Based 202Increase Security 204Risks 209Summary 211Chapter 10 Phase Four: Enable Intent 213Why Enable Intent Further? 213APIs for Intent 215Bringing IBN to the Enterprise 220Intent-Based Examples 223Summary 226Part III Organizational Aspects 227Chapter 11 Architecture Frameworks 229Enterprise Architecture 229Impact of IBN 232Summary 235Chapter 12 Enabling the Digital Business 237What Is Digitalization? 237Stages in Digitalization 239Design Thinking 242Intent-Based Networking 245Organizational Impact 246Summary 249Chapter 13 IT Operations 251Common Frameworks Within IT Operations 252Potential Conflicts and Recommendations 264Summary 267Chapter 14 Tips to Make Your IBN Journey a Success 271Human Change 271Fear 274Quid Pro Quo and Incentives 274Challenge 276Failure 277Forward Thinking 277Ownership 278Training and Demonstration 279Stakeholders and Governance 279Lifecycle Management 280Summary 280Appendix A Campus Network Technologies 283Appendix B (online only) Sample Configurations 19780135466339, TOC, 11/4/2019

Pieter-Jan Nefkens is a long-term Dutch-based IT and network consultant. From early on in his career he has been connecting devices and people, even before the Internet era. Pieter-Jan started his career immediately as an entrepreneur in IT with expertise in networking, security, virtualization, and active software development. Throughout his 20+ years of experience as a consultant, he has always been on top of new trends and technologies and applied them through implementation projects and consultancy to solve specific business problems of his customers, varying from small companies to large international operating enterprises. Pieter-Jan firmly believes that you can only consult and apply technologies if you have used them yourself. Pieter-Jan has always had a strong and close relationship with Cisco since the start of his career, resulting in his participation in beta tests and early field trials, often being one of the first to deploy a new network technology.Sharing and applying new technology is in the DNA of Pieter-Jan, which resulted in his becoming a Cisco Champion since 2017. Besides networking consultancy, Pieter-Jan also participated in standardization processes for inland shipping across Europe.Over the past years, Pieter-Jan has been working for both the Dutch government as well as his own consultancy company.

• Introduction xxPart I Overview of Intent-Based Networking 1Chapter 1 Classic Campus Network Deployments 3Campus Design Fundamentals 4Wireless Networks 10Design Choices 15Summary 20Chapter 2 Why Change Current Networks? A Need for Change 23Wireless/Mobility Trends 23Connected Devices (IoT/Non-User Operated Devices) 26Complexity 28Manageability 29Cloud (Edge) 30(Net)DevOps 32Digitalization 35Summary 36Chapter 3 Enterprise Architecture 37What Is an Architecture Framework? 37The TOGAF® Standard 39Enterprise Architectures 48Summary 49Chapter 4 Cisco Digital Network Architecture 51Requirements 51Cisco DNA Design Concept 56Design Principles 60Common Design Principles 68Overview of Cisco Solutions 73Summary 74Chapter 5 Intent-Based Networking 77What Is Intent? 78Intent-Based Networking Perspective 80Intent-Based Networking Designs 83Summary 91Two Designs 93Chapter 6 Tools for Intent 95What Is Network Automation? 95Network Automation Tools 97Network Analytics 111Application Behavior Analytics 112Network Analytics Tools 113Summary 119Network Automation 119Network Analytics 120Part II Transforming to an Intent-Based Network 123Chapter 7 Phase One: Identifying Challenges 129Challenges in Day-to-Day Operations 129Inventory 132Level of Standardization 134Maturity Level of an Organization 138Stakeholders 141Prioritize 142Action Plan 143Summary 145Chapter 8 Phase Two: Prepare for Intent 147Matching Requirements 148Standardization of Campus Configuration 155Introducing Assurance/Visibility 162Introducing Automation 166Risks of This Phase 174Summary 176Chapter 9 Phase Three: Design, Deploy, and Extend 179Lab Environment 179Which Technology? 181Deploy a Baseline 187Convert to Intents 200Extend Intent Based 202Increase Security 204Risks 209Summary 211Chapter 10 Phase Four: Enable Intent 213Why Enable Intent Further? 213APIs for Intent 215Bringing IBN to the Enterprise 220Intent-Based Examples 223Summary 226Part III Organizational Aspects 227Chapter 11 Architecture Frameworks 229Enterprise Architecture 229Impact of IBN 232Summary 235Chapter 12 Enabling the Digital Business 237What Is Digitalization? 237Stages in Digitalization 239Design Thinking 242Intent-Based Networking 245Organizational Impact 246Summary 249Chapter 13 IT Operations 251Common Frameworks Within IT Operations 252Potential Conflicts and Recommendations 264Summary 267Chapter 14 Tips to Make Your IBN Journey a Success 271Human Change 271Fear 274Quid Pro Quo and Incentives 274Challenge 276Failure 277Forward Thinking 277Ownership 278Training and Demonstration 279Stakeholders and Governance 279Lifecycle Management 280Summary 280Appendix A Campus Network Technologies 283Appendix B (online only) Sample Configurations 19780135466339, TOC, 11/4/2019