Network Programmability with YANG
The Structure of Network Automation with YANG, NETCONF, RESTCONF, and gNMI
(Sprache: Englisch)
Network Programmability with YANG gives you complete and reliable guidance for unlocking the full power of network automation using model-driven APIs and protocols. Authored by three YANG pioneers, this plain-spoken book guides you through successfully...
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Klappentext zu „Network Programmability with YANG “
Network Programmability with YANG gives you complete and reliable guidance for unlocking the full power of network automation using model-driven APIs and protocols. Authored by three YANG pioneers, this plain-spoken book guides you through successfully applying software practices based on YANG data models. The authors focus on the network operations layer, emphasizing model-driven APIs, and underlying transports. This guide can help you dramatically improve value, agility, and manageability throughout your network.- Discover the value of implementing YANG and Data Model-Driven Management in your network
- Explore the layers and components of a complete working solution
- Build a business case where value increases as your solution grows
- Drill down into transport protocols: NETCONF, RESTCONF, and gNMI/gRPC
- See how telemetry can establish a valuable automated feedback loop
- Find data models you can build on, and evaluate models with similar functionality
- Understand models, metadata, and tools from several viewpoints: architect, operator, module author, and application developer
- Walk through a complete automation journey: business case, service model, service implementation, device integration, and operation
- Leverage the authors' experience to design successful YANG models and avoid pitfalls
- Accelerate service delivery and minimize network lifecycle costs by unlocking the power of YANG-based network automation
- An easy to understand overview of YANG, packed with practical implementation examples
- Focuses on the network management aspects of network programmability
- By authors at the forefront of the YANG development effort and the YANG modeling revolution
- For wide audiences of network professionals called upon to improve value, agility, and manageability in large-scale networks
Inhaltsverzeichnis zu „Network Programmability with YANG “
Introduction xxii1 The Network Management World Must Change: Why Should You Care? 2
Introduction 2
The Industry Has Changed: What Are the Trends? 6
Existing Network Management Practices and Related Limitations 24
Data Modeling Is Key for Automation 39
Interview with the Experts 48
Summary 52
References in This Chapter 53
Endnotes 53
2 Data Model—Driven Management 56
The Beginning: A New Set of Requirements 56
Network Management Is Dead, Long Live Network Management 59
YANG: The Data Modeling Language 61
The Management Architecture 69
Data Model—Driven Management Components 70
The Encoding (Protocol Binding and Serialization) 74
The Server Architecture: Datastore 77
The Protocols 78
The Programming Language 85
Telemetry 86
The Bigger Picture: Using NETCONF to Manage a Network 86
Interview with the Experts 91
Summary 93
References in This Chapter 93
Endnotes 94
3 YANG Explained 96
Introduction 96
Describe Your World of Data 96
Describing Possible Events 113
Separating Configuration from Operational Data 117
Constraints Keep Things Meaningful 122
Augmenting, Extending, and Possibly Deviating 142
Network Management Datastore Architecture (NMDA) 149
Interview with the Expert 154
Summary 156
References in This Chapter 157
4 NETCONF, RESTCONF, and gNMI Explained 158
Introduction 158
NETCONF 158
RESTCONF 190
OpenConfig and gNMI 214
Interview with the Expert 225
Summary 227
References in This Chapter 227
5 Telemetry Explained 230
Introduction 230
Data Model—Driven Telemetry 230
Moving Away from SNMP to Telemetry 232
Telemetry Use Cases 235
Telemetry Components 236
Telemetry Standard Mechanisms 242
Interview with the Experts 249
Summary 252
References in This Chapter 253
Endnotes 253
6 YANG Data Modeling Developments in the Industry 256
Introduction 256
The Beginning: The IETF 256
Embracing YANG Throughout the Industry 263
The OpenConfig YANG Model 268
Industry
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Coordination Is Required 270
Interoperability Testing 272
Implementing More Than One YANG Model for a Specific Functionality 274
Interview with the Expert 275
Summary 278
References in This Chapter 279
Endnotes 279
7 Automation Is as Good as the Data Models, Their Related
Metadata, and the Tools: For the Network Architect and Operator 282
Introduction 282
Getting to Know the Structure of a YANG Module 283
Finding the Right Modules Using the YANG Catalog 287
Interacting with Devices 299
Interview with the Experts 331
Summary 335
Endnotes 335
8 Automation Is as Good as the Data Models,
Their Related Metadata, and the Tools: For the Module Author 336
Introduction 336
Designing Modules 336
Understanding Your Module’s Impact 349
Interview with the Expert 350
Summary 352
Endnotes 352
9 Automation Is as Good as the Data Models, Their Related Metadata, and the Tools: For the Application Developer 354
Introduction 354
Working with YANG Modules 355
Interacting with the Network 366
Making YANG Language Native 373
Interview with the Expert 380
Summary 381
Endnotes 382
10 Using NETCONF and YANG 384
Introduction 384
So the Story Goes 385
Top-Down Service Model 386
Bottom-Up Device Templates 392
Service Logic Connecting the Dots 394
Setting Up NETCONF on a Device 398
Discovering What’s on a Device 400
Managing Services 405
Manager Synchronization with Devices 413
Network-Wide Transactions 417
Interview with the Experts 425
Summary 428
11 YANG Model Design 430
Introduction 430
Modeling Strategy 430
YANG Modeling Tips 433
Common YANG Mistakes 443
Backward Compatibility 457
Interview with the Experts 460
Summary 462
References in This Chapter 463
9780135180396, TOC, 4/4/19
Interoperability Testing 272
Implementing More Than One YANG Model for a Specific Functionality 274
Interview with the Expert 275
Summary 278
References in This Chapter 279
Endnotes 279
7 Automation Is as Good as the Data Models, Their Related
Metadata, and the Tools: For the Network Architect and Operator 282
Introduction 282
Getting to Know the Structure of a YANG Module 283
Finding the Right Modules Using the YANG Catalog 287
Interacting with Devices 299
Interview with the Experts 331
Summary 335
Endnotes 335
8 Automation Is as Good as the Data Models,
Their Related Metadata, and the Tools: For the Module Author 336
Introduction 336
Designing Modules 336
Understanding Your Module’s Impact 349
Interview with the Expert 350
Summary 352
Endnotes 352
9 Automation Is as Good as the Data Models, Their Related Metadata, and the Tools: For the Application Developer 354
Introduction 354
Working with YANG Modules 355
Interacting with the Network 366
Making YANG Language Native 373
Interview with the Expert 380
Summary 381
Endnotes 382
10 Using NETCONF and YANG 384
Introduction 384
So the Story Goes 385
Top-Down Service Model 386
Bottom-Up Device Templates 392
Service Logic Connecting the Dots 394
Setting Up NETCONF on a Device 398
Discovering What’s on a Device 400
Managing Services 405
Manager Synchronization with Devices 413
Network-Wide Transactions 417
Interview with the Experts 425
Summary 428
11 YANG Model Design 430
Introduction 430
Modeling Strategy 430
YANG Modeling Tips 433
Common YANG Mistakes 443
Backward Compatibility 457
Interview with the Experts 460
Summary 462
References in This Chapter 463
9780135180396, TOC, 4/4/19
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Autoren-Porträt von Benoit Claise, Joe Clarke, Jan Lindblad
Benoît Claise, CCIE No. 2686, is a Cisco Fellow, working as an architect for embedded management. Areas of passion and expertise include Internet traffic monitoring, accounting, performance, fault, and configuration management. Benoît’s area of focus these days is network automation with YANG as the data modeling language, NETCONF/RESTCONF, and telemetry as a feedback loop to solve intent-based networking.Benoît was IETF Operations and Management Area (OPS) co-director from 2012 to 2018, a period during which much of the data model–driven management protocols, encoding, and data models were specified. He blogs on these topics on his web site http://www.claise.be/ and spends time on the yangcatalog.org developments. Benoît is a contributor to the IETF, with 35 RFCs in the area of NetFlow, IPFIX (IP Flow Information eXport), PSAMP (Packet Sampling), IPPM (IP Performance Metrics), YANG, MIB module, energy management, and network management in general. Benoît is the co-author of the Cisco Press book Network Management: Accounting and Performance Strategies.
As a Cisco Customer Experience Engineer, Joe Clarke, CCIE No. 5384, has contributed to the development and adoption of many of Cisco’s network management and automation products and technologies. He helps to support, enhance, and promote the embedded automation and programmability features, such as the Embedded Event Manager, Tcl, Python, NETCONF/RESTCONF, and YANG.
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Joe evangelizes these programmability and automation skills in order to build the next generation of network engineers. He is a Cisco Certified Internetworking Expert and certified Cisco Network Programmability Engineer. Joe has authored numerous technical documents on Cisco network management, automation, and programmability products and technologies, as well as a chapter as co-author of Network-Embedded Management and Applications: Understanding Programmable Networking Infrastructure. He also served as one of the technical editors for the Cisco Press books Tcl Scripting for Cisco IOS and Programming and Automating Cisco Networks: A Guide to Network Programmability and Automation in the Data Center, Campus, and WAN. He is an alumnus of the University of Miami and holds a Bachelor of Science degree in computer science.
Outside of Cisco, Joe is a member of the FreeBSD project and the co-chair of the Ops Area Working Group at the IETF. Joe is a certified commercial pilot for single-engine airplanes with an instrument rating. He lives with his beautiful wife in the RTP area of North Carolina.
Jan Lindblad soldered together his first computer at age 12, wrote his first compiler at 16, and reached the million lines of code mark by 30. In 2006, when NETCONF was first published by IETF, Jan was at the then newly founded start-up company Tail-f Systems. Tail-f built the first commercial implementation of NETCONF and was a driving force behind the introduction of YANG.
Jan is an IETF YANG Doctor and has also authored and reviewed many YANG modules in other organizations. Jan has trained several hundred people on the theory and practice of NETCONF and YANG. At the yearly NETCONF/YANG interop event organized by EANTC in Berlin, Germany, Jan plays a central role.
Outside Cisco, Jan is an avid climate activist and environmentalist. He lives outside Stockholm, Sweden, and commutes to work by bike every day.
Joe evangelizes these programmability and automation skills in order to build the next generation of network engineers. He is a Cisco Certified Internetworking Expert and certified Cisco Network Programmability Engineer. Joe has authored numerous technical documents on Cisco network management, automation, and programmability products and technologies, as well as a chapter as co-author of Network-Embedded Management and Applications: Understanding Programmable Networking Infrastructure. He also served as one of the technical editors for the Cisco Press books Tcl Scripting for Cisco IOS and Programming and Automating Cisco Networks: A Guide to Network Programmability and Automation in the Data Center, Campus, and WAN. He is an alumnus of the University of Miami and holds a Bachelor of Science degree in computer science.
Outside of Cisco, Joe is a member of the FreeBSD project and the co-chair of the Ops Area Working Group at the IETF. Joe is a certified commercial pilot for single-engine airplanes with an instrument rating. He lives with his beautiful wife in the RTP area of North Carolina.
Jan Lindblad soldered together his first computer at age 12, wrote his first compiler at 16, and reached the million lines of code mark by 30. In 2006, when NETCONF was first published by IETF, Jan was at the then newly founded start-up company Tail-f Systems. Tail-f built the first commercial implementation of NETCONF and was a driving force behind the introduction of YANG.
Jan is an IETF YANG Doctor and has also authored and reviewed many YANG modules in other organizations. Jan has trained several hundred people on the theory and practice of NETCONF and YANG. At the yearly NETCONF/YANG interop event organized by EANTC in Berlin, Germany, Jan plays a central role.
Outside Cisco, Jan is an avid climate activist and environmentalist. He lives outside Stockholm, Sweden, and commutes to work by bike every day.
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Bibliographische Angaben
- Autoren: Benoit Claise , Joe Clarke , Jan Lindblad
- 2019, xxiii, 487 Seiten, Masse: 19,5 x 24,1 cm, Gebunden, Englisch
- Verlag: Addison-Wesley
- ISBN-10: 0135180392
- ISBN-13: 9780135180396
Sprache:
Englisch
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