Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers
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Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers

Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers

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About the Book

The definitive professional’s guide to the Cisco next-gen 9800 wireless controllers As wireless networks, applications, and services rapidly evolve, they grow increasingly business critical, with steeper requirements for performance, latency, deployment density, and device support. The advanced Catalyst 9800 wireless controllers from Cisco meet these challenges, delivering exceptional adaptability, security, performance, scalability, and programmability. Based on the modern and secure Cisco IOS XE operating system, their support for Cisco intent-based networking will help you continually leverage new innovation. Now, four Cisco experts offer end-to-end guidance, practical tips, and proven recommendations for designing, deploying, and managing wireless networks with the Catalyst 9800. For technical decision makers, this guide delivers a deep understanding of Catalyst 9800 hardware and software, tightly linked to business value. Architects will find essential details for both upfront network design and feature implementation. Network operators and other IT professionals will discover tested tools and methods for reliable and efficient setup, configuration, monitoring, and troubleshooting. Whatever your role, this guide will help you maximize the value of any Catalyst 9800 network, and serve as your indispensable reference for years to come. Understand Catalyst 9800 benefits, capabilities, roles, and architecture Learn the new C9800 Configuration Model, with key design considerations and best practices Deploy and configure the C9800 in private and public clouds Systematically secure the C9800: from AAA and ACLs to rogue detection and wireless intrusion prevention (WIPS) Establish and optimize seamless client roaming in enterprise environments Learn how the C9800 implements key RF concepts Plan and implement an end-to-end architecture for QoS, and design/ deploy for high availability and network services like multicast Discover value-added wireless services available through Cisco DNA Spaces Drive agility and value via network programmability with YANG, Python, RESTCONF, and NETCONF Make the most out of the rich data models of Model-Driven Telemetry and Programmability using open-source tools Walk through wireless network troubleshooting, backup/restore, and upgrades

Table of Contents:
Introduction xxvii Chapter 1 Cisco C9800 Series 1 Why Cisco C9800? 2 The Role of the Wireless Controller in a Cloud Era 7 Managing the Cisco C9800 10 Cisco Next-Generation Wireless Stack 22 Summary 23 References 23 Chapter 2 Hardware and Software Architecture of the C9800 25 General CAPWAP Split MAC Architecture 25 The Controller Control Plane Architecture Elasticity 27 Wireless Client State Machine 31 One Dataplane to Rule Them All (or Three at the Maximum) 35 Hardware Overview 38 Summary 42 Chapter 3 C9800 Configuration Model 43 C9800 New Configuration Model 43 Cisco C9800 Series Profile and Tag Considerations 48 Summary 64 References 64 Chapter 4 C9800 Deployment and Installation 65 C9800 Deployment Models 65 Setting Up Your First Catalyst Wireless Network 79 Summary 87 References 87 Chapter 5 Security 89 Network Security Fundamentals 89 Wireless Security Fundamentals 116 Securing the Air 128 Securing Your Access Points 148 Securing Your Wireless Controller 151 Encrypted Traffic Analytics 154 Cisco Umbrella 155 Cisco Secure Development Lifecycle (CSDL) 157 Summary 157 References 157 Chapter 6 Mobility and Client Roaming 159 802.11 Roaming 160 Types of Client Roaming 181 C9800 to AireOS Inter-Release Controller Mobility (IRCM) 191 Summary 192 References 193 Chapter 7 RF Deployment and Guidelines 195 Radio Resources Management (RRM) Concepts and Components 195 Challenging RF Environments 199 Radio Resources Management (RRM) 203 DCA 211 RF Profiles 215 Spectrum Intelligence and CleanAir 219 Advanced RF Features 224 Airtime Fairness (ATF) 228 Dynamic Frequency Selection (DFS) 232 Flexible Radio Assignment (FRA) 235 Wireless Intrusion Prevention System (WIPS) and Rogue Detection 238 Summary 246 References 246 Chapter 8 Multicast and Multicast Domain Name System (mDNS) 247 Wireless Multicast 250 Media Stream Feature 263 mDNS 272 Summary 283 References 283 Chapter 9 Quality of Service (QoS) 285 Wi-Fi Quality of Service (QoS) 286 Wi-Fi (802.11) QoS Fundamentals 287 Implementing Wireless QoS on the C9800 300 Designing and Deploying Catalyst C9800 QoS 304 Best Practices 320 Summary 322 References 322 Chapter 10 C9800 High Availability 323 SSO Redundancy 324 HA Teardown 349 SSO Deployment: Impact on Features 350 N+1 Redundancy 352 N+1 vs. SSO High Availability 357 HA in EWC-AP Deployment 358 HA in EWC-SW Deployment 359 Summary 359 References 360 Chapter 11 Cisco DNA Spaces Integration and IoT 361 Value-Added Wireless Services 361 Connected Mobile Experiences (CMX) 372 Cisco DNA Spaces 372 Specific Service Examples 379 Summary 392 References 392 Chapter 12 Network Programmability 393 What Is Network Programmability? 393 Why Is Network Programmability Needed? 393 Is Network Programmability a New Concept? 396 Orchestration of the Entire Network 396 Configuration Repeatability 396 Idempotency 397 Imperative vs. Declarative Models 397 Infrastructure as Code (IaC) 400 Network Programmability in the C9800 401 Data Models 402 YANG Data Models 403 Encoding Formats 406 Protocols 408 Tools to Examine YANG Models 412 How to Examine Data Using NETCONF and YANG Suite 419 How to Examine Data Using RESTCONF and POSTMAN 421 Python and Network Programmability 429 Summary 436 References 436 Chapter 13 Model-Driven Telemetry 437 What Is Model-Driven Telemetry? 437 How to Enable Model-Driven Telemetry 438 Operational Data and KPIs 441 Polling vs. Subscribing 447 Telemetry Streams 448 How to Identify Subtrees in YANG Models 449 Dial-out vs. Dial-in 450 Tools 460 Summary 467 References 467 Chapter 14 Cisco DNA Center/Assurance Integration 469 Introduction 469 Managing the C9800 with Cisco DNA Center 472 Summary 492 References 492 Chapter 15 Backing Up, Restoring, and Upgrading Your C9800 493 Saving and Restoring the Configuration for Disaster Recovery 493 Running IOS-XE in Install or Bundle Mode 500 Upgrading (and Downgrading) the Controller Safely 501 Summary 506 References 506 Chapter 16 Troubleshooting 507 Control Plane Tracing 509 Embedded Packet Capture (EPC) 525 Packet Tracer 531 Troubleshooting Dashboard 536 Other On-the-Box Tools on the C9800 GUI 540 Offline Tools for the C9800 545 Health and KPI Monitoring 548 Summary 577 References 578 Appendix A Setting Up a Development Environment 579 9780137492329, TOC, 5/27/2022


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Product Details
  • ISBN-13: 9780137492329
  • Publisher: Pearson Education (US)
  • Publisher Imprint: Cisco Press
  • Height: 233 mm
  • No of Pages: 656
  • Spine Width: 33 mm
  • Width: 187 mm
  • ISBN-10: 0137492324
  • Publisher Date: 09 Aug 2022
  • Binding: Paperback
  • Language: English
  • Returnable: Y
  • Weight: 1134 gr


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Understanding and Troubleshooting Cisco Catalyst 9800 Series Wireless Controllers
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