Network Programmability and Automation Fundamentals

Khaled Abuelenain, CCIE No. 27401 (R&S, SP), is currently the Consulting Director at Acuative, a Cisco Managed Services Master Partner. Khaled has spent the past 18 years designing, implementing, operating, and automating networks and clouds. He specializes in service provider technologies, SD-WAN, data center technologies, programmability, automation, and cloud architectures. Khaled is especially interested in Linux and OpenStack.Khaled is a contributing author of the best-selling Cisco Press book Routing TCP/IP, Volume II, 2nd edition, by Jeff Doyle. He also blogs frequently on network programmability and automation on blogs.cisco.com. Khaled is also a member of the DevNet500 group, being one of the first 500 individuals in the world to become DevNet certified. Khaled lives in Riyadh, Saudi Arabia, and when not working or writing, he likes to run marathons and skydive. He can be reached at kabuelenain@gmail.com, on Twitter at @kabuelenain or on LinkedIn at linkedin.com/in/kabuelenain.Jeff Doyle, CCIE No. 1919, is a Member of Technical Staff at Apstra. Specializing in IP routing protocols, complex BGP policy, SDN/NFV, data center fabrics, IBN, EVPN, MPLS, and IPv6, Jeff has designed or assisted in the design of large-scale IP and IPv6 service provider networks in 26 countries over 6 continents.Jeff is the author of CCIE Professional Development: Routing TCP/IP, Volumes I and II and OSPF and IS-IS: Choosing an IGP for Large-Scale Networks; a co-author of Software-Defined Networking: Anatomy of OpenFlow; and an editor and contributing author of Juniper Networks Routers: The Complete Reference. Jeff is currently writing CCIE Professional Development: Switching TCP/IP. He also writes for Forbes and blogs for both Network World and Network Computing. Jeff is one of the founders of the Rocky Mountain IPv6 Task Force, is an IPv6 Forum Fellow, and serves on the executive board of the Colorado chapter of the Internet Society (ISOC).Anton Karneliuk, CCIE No. 49412 (R&S, SP), is a Network Engineer and Manager at THG Hosting, responsible for the development, operation, and automation of networks in numerous data centers across the globe and the international backbone. Prior to joining THG, Anton was a team lead in Vodafone Group Network Engineering and Delivery, focusing on introduction of SDN and NFV projects in Germany. Anton has 15 years of extensive experience in design, rollout, operation, and optimization of large-scale service providers and converged networks, focusing on IP/MPLS, BGP, network security, and data center Clos fabrics built using EVPN/VXLAN. He also has several years of full-stack software development experience for network management and automation.Anton holds a B.S. in telecommunications and an M.S. in information security from Belarusian State University of Informatics and Radio Electronics. You can find him actively blogging about network automation and running online training at Karneliuk. com. Anton lives with his wife in London.Vinit Jain, CCIE No. 22854 (R&S, SP, Security & DC), is a Network Development Engineer at Amazon, managing the Amazon network backbone operations team. Previously, he worked as a technical leader with the Cisco Technical Assistance Center (TAC), providing escalation support in routing and data center technologies. Vinit is a speaker at various networking forums, including Cisco Live! events. He has co-authored several Cisco Press titles, such as Troubleshooting BGP, and Troubleshooting Cisco Nexus Switches and NX-OS, LISP Network Deployment and Troubleshooting, and has authored and co-authored several video courses, including BGP Troubleshooting, the CCNP DCCOR Complete Video Course, and the CCNP ENCOR Complete Video Course. In addition to his CCIEs, Vinit holds multiple certifications related to programming and databases. Vinit graduated from Delhi University in mathematics and earned a master’s in information technology from Kuvempu University in India. Vinit can be found on Twitter as @VinuGenie.

• Introduction xxixPart I IntroductionChapter 1 The Network Programmability and Automation Ecosystem 1First, a Few Definitions 2Your Network Programmability and Automation Toolbox 14Software and Network Engineers: The New Era 19Part II LinuxChapter 2 Linux Fundamentals 21The Story of Linux 21The Linux Boot Process 26A Linux Command Shell Primer 28Finding Help in Linux 31Files and Directories in Linux 35Input and Output Redirection 57Archiving Utilities 67Linux System Maintenance 73Installing and Maintaining Software on Linux 94Summary 118Chapter 3 Linux Storage, Security, and Networks 119Linux Storage 119Linux Security 135Linux Networking 158Summary 181Chapter 4 Linux Scripting 183Regular Expressions and the grep Utility 184The AWK Programming Language 193The sed Utility 196General Structure of Shell Scripts 203Output and Input 207Variables 215Conditional Statements 223Loops 232The until-do Loop 237Functions 238Expect 242Summary 246Part III PythonChapter 5 Python Fundamentals 249Scripting Languages Versus Programming Languages 250Network Programmability 253Computer Science Concepts 255Python Fundamentals 260Summary 309References 310Chapter 6 Python Applications 311Organizing the Development Environment 311The virtualenv Tool 331Python Modules 333Python Applications 336Summary 385Part IV TransportChapter 7 HTTP and REST 387HTTP Overview 387The REST Framework 392The HTTP Connection 394HTTP Transactions 397HTTP Messages 415Resource Identification 431Postman 436HTTP and Bash 447HTTP and Python 455Summary 467Chapter 8 Advanced HTTP 469HTTP/1.1 Authentication 469Transport Layer Security (TLS) and HTTPS 487HTTP/2 503Summary 508Chapter 9 SSH 509SSH Overview 509Setting Up SSH 521Enabling SSH on Cisco Devices 526Secure File Transfer 540Summary 551References 551Part V EncodingChapter 10 XML 553XML Overview, History, and Usage 553XML Syntax and Components 554Making XML Valid 562Navigating XML Documents 574XML Stylesheet Language Transformations (XSLT) 578Processing XML Files with Python 580Summary 588Chapter 11 JSON 591JavaScript Object Notation (JSON) 591JSON Schema Definition (JSD) 595Summary 614Chapter 12 YAML 615YAML Structure 616Handling YAML Data Using Python 626Summary 637Part VI ModelingChapter 13 YANG 639A Data Modeling Primer 639YANG Data Models 642Types of YANG Modules 663YANG Tools 673Summary 688Part VII ProtocolsChapter 14 NETCONF and RESTCONF 689NETCONF 689RESTCONF 739Summary 779Chapter 15 gRPC, Protobuf, and gNMI 781Requirements for Efficient Transport 781History and Principles of gRPC 782gRPC as a Transport 784The Protocol Buffers Data Format 786Working with gRPC and Protobuf in Python 790The gNMI Specification 798The Anatomy of gNMI 799Managing Network Elements with gNMI/gRPC 814Summary 818Chapter 16 Service Provider Programmability 819The SDN Framework for Service Providers 819Segment Routing (SR) 823BGP Link State (BGP-LS) 843Path Computation Element Protocol (PCEP) 859Summary 880Part VIII Programmability ApplicationsChapter 17 Programming Cisco Platforms 881API Classification 882Network Platforms 883Meraki 922DNA Center 931Collaboration Platforms 942Summary 954Chapter 18 Programming Non-Cisco Platforms 957General Approaches to Programming Networks 957Implementation Examples 962Summary 987Chapter 19 Ansible 989Ansible Basics 989Extending Ansible Capabilities 1003Jinja2 Templates 1034Using Ansible for Cisco IOS XE 1055Using Ansible for Cisco IOS XR 1073Using Ansible for Cisco NX-OS 1084Using Ansible in Conjunction with NETCONF 1095Summary 1108Part IX Looking AheadChapter 20 Looking Ahead 1109Some Rules of Thumb 1109What Does All This Mean for Your Career? 11189781587145148, TOC, 4/1/2021