Network Programmability with Yang: The Structure of Network Automation with Yang, Netconf, Restconf, and Gnmi

Today, networks must evolve and scale faster than ever. You can't manage everything by hand anymore: You need to automate relentlessly. YANG, along with the NETCONF, RESTCONF, or gRPC/gNMI protocols, is the most practical solution, but most implementers have had to learn by trial and error. Now, 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.
Whether you're a network operator, DevOps engineer, software developer, orchestration engineer, NMS/OSS architect, service engineer, or manager, 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
  

今天，網絡必須比以往更快地演進和擴展。你不能再手動管理一切：你需要無情地自動化。YANG連同NETCONF、RESTCONF或gRPC/gNMI協議是最實用的解決方案，但大多數實施者必須通過試錯法學習。現在，《使用YANG進行網絡可編程性》這本書為您提供了完整可靠的指導，以利用基於模型驅動的API和協議的網絡自動化的全部潛力。

這本書由三位YANG先驅撰寫，以平實的語言引導您成功應用基於YANG數據模型的軟件實踐。作者們專注於網絡操作層，強調模型驅動的API和底層傳輸。

無論您是網絡運營商、DevOps工程師、軟件開發人員、編排工程師、NMS/OSS架構師、服務工程師還是經理，本指南都可以幫助您在整個網絡中顯著提高價值、靈活性和可管理性。

- 發現在您的網絡中實施YANG和數據模型驅動管理的價值
- 探索完整工作解決方案的層和組件
- 建立一個業務案例，價值隨著解決方案的增長而增加
- 深入研究傳輸協議：NETCONF、RESTCONF和gNMI/gRPC
- 看看遙測如何建立有價值的自動化反饋循環
- 找到可以建立的數據模型，並評估具有相似功能的模型
- 從多個觀點（架構師、操作員、模塊作者和應用程序開發人員）理解模型、元數據和工具
- 走過完整的自動化之旅：業務案例、服務模型、服務實施、設備集成和操作
- 利用作者的經驗設計成功的YANG模型並避免陷阱

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.

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.

Benoît Claise，CCIE No. 2686，是思科公司的一位資深工程師，擔任嵌入式管理架構師的角色。他的專業領域包括互聯網流量監控、計費、性能、故障和配置管理。Benoît目前的重點是使用YANG作為數據建模語言、NETCONF/RESTCONF和遙測作為反饋循環，解決基於意圖的網絡問題。

從2012年到2018年，Benoît擔任IETF運營和管理領域（OPS）的聯合主任，期間制定了許多數據模型驅動的管理協議、編碼和數據模型。他在自己的網站http://www.claise.be/上以博客形式分享這些主題，並參與yangcatalog.org的開發工作。Benoît是IETF的貢獻者，在NetFlow、IPFIX（IP流量信息導出）、PSAMP（封包採樣）、IPPM（IP性能指標）、YANG、MIB模塊、能源管理和網絡管理等領域共撰寫了35個RFC。他也是思科出版社書籍《網絡管理：計費和性能策略》的合著者。

作為思科客戶體驗工程師，Joe Clarke，CCIE No. 5384，為思科的許多網絡管理和自動化產品和技術的開發和采用做出了貢獻。他協助支持、增強和推廣嵌入式自動化和可編程功能，如嵌入式事件管理器、Tcl、Python、NETCONF/RESTCONF和YANG。

Joe致力於推廣這些可編程和自動化技能，以建立下一代網絡工程師。他是思科認證的網絡專家和認證的思科網絡可編程工程師。Joe撰寫了許多有關思科網絡管理、自動化和可編程產品和技術的技術文件，並作為合著者之一撰寫了《網絡嵌入式管理和應用：理解可編程網絡基礎設施》的一章。他還擔任思科出版社書籍《Tcl腳本編程和編程和自動化思科網絡：數據中心、校園和廣域網絡的可編程和自動化指南》的技術編輯之一。他畢業於邁阿密大學，擁有計算機科學學士學位。

在思科以外，Joe是FreeBSD項目的成員，也是IETF的Ops區域工作組的聯合主席。Joe是具有儀器評級的單引擎飛機的認證商業飛行員。他與他美麗的妻子一起生活在北卡羅來納州的RTP地區。

Jan Lindblad在12歲時焊接了他的第一台電腦，16歲時寫了他的第一個編譯器，30歲時達到了百萬行代碼的里程碑。2006年，當NETCONF首次由IETF發布時，Jan在當時新成立的初創公司Tail-f Systems工作。Tail-f建立了NETCONF的第一個商業實現，並在YANG的引入方面起到了推動作用。

Jan是IETF的YANG醫生，也在其他組織中撰寫和審查了許多YANG模塊。Jan已經培訓了幾百人關於NETCONF和YANG的理論和實踐。在由EANTC在德國柏林組織的年度NETCONF/YANG互操作性活動中，Jan扮演著重要角色。

在思科以外，Jan是一位熱衷的氣候行動者和環保主義者。他居住在瑞典斯德哥爾摩市郊，每天騎自行車上下班。