Deploying and Troubleshooting Cisco Wireless LAN Controllers

Deploying and Troubleshooting Cisco Wireless LAN Controllers

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This is the only complete, all-in-one guide to deploying, running, and troubleshooting wireless networks with Cisco (R) Wireless LAN Controllers (WLCs) and Lightweight Access Point Protocol (LWAPP)/Control and Provisioning of Wireless Access Points (CAPWAP). Authored by two of the most experienced Cisco wireless support professionals, the book presents start-to-finish coverage of implementing WLCs in existing wired and wireless network environments, troubleshooting design-related issues, and using LWAPP/CAPWAP solutions to achieve your specific business and technical goals. One step at a time, you'll walk through designing, configuring, maintaining, and scaling wireless networks using Cisco Unified Wireless technologies. The authors show how to use LWAPP/CAPWAP to control multiple Wi-Fi wireless access points at once, streamlining network administration and monitoring and maximizing scalability. Drawing on their extensive problem-resolution experience, the authors also provide expert guidelines for troubleshooting, including an end-to-end problem-solving model available in no other book. Although not specifically designed to help you pass the CCIE (R) Wireless written and lab exams, this book does provide you with real-world configuration and troubleshooting examples. Understanding the basic configuration practices, how the products are designed to function, the feature sets, and what to look for while troubleshooting these features will be invaluable to anyone wanting to pass the CCIE Wireless exams. Efficiently install, configure, and troubleshoot Cisco Wireless LAN Controllers Move autonomous wireless network solutions to LWAPP/CAPWAP Integrate LWAPP/CAPWAP solutions into existing wired networks Understand the next-generation WLC architecture Use Hybrid REAP and Home AP solutions to centrally configure and control branch/remote access points without deploying controllers in every location Use Mobility Groups to provide system-wide mobility easily and cost-effectively Use Cisco WLC troubleshooting tools, and resolve client-related problems Maximize quality in wireless voice applications Build efficient wireless mesh networks Use RRM to manage RF in real-time, optimizing efficiency and performance Reference the comprehensive WLC and AP debugging guide Part of the CCIE Professional Development Series, this is the first book to offer authoritative training for the new CCIE Wireless Exam. It will also serve as excellent preparation for Cisco's new CCNP (R) Wireless exam.
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Product details

  • Hardback | 600 pages
  • 194 x 234 x 36mm | 1,102.22g
  • Pearson Education (US)
  • Cisco Press
  • Indianapolis, United States
  • English
  • 1587058146
  • 9781587058141
  • 971,072

Back cover copy

This is the only complete, all-in-one guide to deploying, running, and troubleshooting wireless networks with Cisco(R) Wireless LAN Controllers (WLCs) and Lightweight Access Point Protocol (LWAPP)/Control and Provisioning of Wireless Access Points (CAPWAP). Authored by two of the most experienced Cisco wireless support professionals, the book presents start-to-finish coverage of implementing WLCs in existing wired and wireless network environments, troubleshooting design-related issues, and using LWAPP/CAPWAP solutions to achieve your specific business and technical goals. One step at a time, you'll walk through designing, configuring, maintaining, and scaling wireless networks using Cisco Unified Wireless technologies. The authors show how to use LWAPP/CAPWAP to control multiple Wi-Fi wireless access points at once, streamlining network administration and monitoring and maximizing scalability. Drawing on their extensive problem-resolution experience, the authors also provide expert guidelines for troubleshooting, including an end-to-end problem-solving model available in no other book. Although not specifically designed to help you pass the CCIE(R) Wireless written and lab exams, this book does provide you with real-world configuration and troubleshooting examples. Understanding the basic configuration practices, how the products are designed to function, the feature sets, and what to look for while troubleshooting these features will be invaluable to anyone wanting to pass the CCIE Wireless exams. Efficiently install, configure, and troubleshoot Cisco Wireless LAN Controllers Move autonomous wireless network solutions to LWAPP/CAPWAP Integrate LWAPP/CAPWAP solutions into existing wired networks Understand the next-generation WLC architecture Use Hybrid REAP and Home AP solutions to centrally configure and control branch/remote access points without deploying controllers in every location Use Mobility Groups to provide system-wide mobility easily and cost-effectively Use Cisco WLC troubleshooting tools, and resolve client-related problems Maximize quality in wireless voice applications Build efficient wireless mesh networks Use RRM to manage RF in real-time, optimizing efficiency and performance Reference the comprehensive WLC and AP debugging guide Part of the CCIE Professional Development Series, this is the first book to offer authoritative training for the new CCIE Wireless Exam. It will also serve as excellent preparation for Cisco's new CCNP(R) Wireless exam.
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About Mark L. Gress

Mark L. Gress, CCIE 25539, is an escalation engineer at the Cisco Systems Technical Assistance Center (TAC) in Research Triangle Park, North Carolina, where he has worked since 2005. He has been troubleshooting complex wireless networks since the birth of the Cisco Wireless LAN Controller (WLC) as a TAC engineer, a technical lead for the Enterprise Wireless team, and now as an escalation engineer supporting the complete Cisco line of wireless products. Mark has diagnosed problems in some of the largest Cisco wireless deployments and has provided training for TAC teams around the world. He has also contributed to numerous design guides, application notes, and white papers. As one of the highest contributors of identifying and assisting in defect resolution, his work has led to increases in overall product quality and stability. Mark graduated summa cum laude with a bachelors of science in both computer information systems and business management from North Carolina Wesleyan College. For more than ten years, Mark has been professionally involved in the networking industry. Lee Johnson is currently a wireless specialist on the RTP Wireless TAC team at Cisco. He has been troubleshooting wireless networks, including both autonomous and controllerbased infrastructures, since 2006. Lee troubleshoots complex wireless issues in Cisco customer networks around the world. He has been dispatched to customer sites to address critical accounts and represented Cisco at Networkers. He also provides training and documentation for fellow Cisco engineers in both wireless and nonwireless TAC groups. Lee works closely with the wireless development group at Cisco to improve product quality and the customer experience with the WLC. He holds a bachelor of science degree in biology from the University of North Carolina at Chapel Hill.
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Table of contents

Introduction xviiiChapter 1 Troubleshooting Strategy and Implementation 1 Developing a Troubleshooting Strategy 1 Production Versus Nonproduction Outages 1 Step 1: Gathering Data About the Problem 2 Step 2: Identifying the Problem 2 Step 3: Isolating the Problem 3 Step 4: Analyzing the Data Collected About the Problem 7 Summary 9Chapter 2 Wireless LAN Controllers and Access Points 11 Wireless LAN Controller Platforms 11 Current Production WLCs 12 Previous WLCMs 15 Functionality Differences Between WLCs 17 WLC Hardware and Software Requirements 19 Lightweight AP Models 20 Cisco Aironet APs 20 Airespace APs 25 AP 1000 Series Functionality Differences 26 AP 1000 Series Limitations 26 Lightweight Compared to Traditional Autonomous APs 28 Scalability 28 RRM 29 Self-Healing Mechanism 30 WLC Features 30 Central Management 32 Summary 35Chapter 3 Introduction to LWAPP 37 Defining LWAPP 37 Quick Protocol Overview 38 LWAPP Advantages 41 Management 42 Scalability 42 Security 43 Mobility 43 LWAPP Mechanics 44 Discovery Process 45 Join Process 55 Image Process 56 Config State 56 Run State 57 Dissecting the Discovery Response 58 Manually Dissecting the Discovery Response 59 Summary 61Chapter 4 The CAPWAP Protocol 63 Overview of CAPWAP 64 Differences from LWAPP 65 CAPWAP Session Establishment/AP Joining Process 67 Discovery Process 70 DTLS Session Establishment 71 Join/Config/Run 81 Troubleshooting CAPWAP Session Establishment/AP Discovery and Join 90 CAPWAP Communication: Control and Data Encryption 98 CAPWAP Communication: Sequence Numbers and Retransmissions 100 CAPWAP Fragmentation and Path MTU Discovery 101 CAPWAP-Control Packets Fragmentation 101 CAPWAP-Data Packets Fragmentation 101 CAPWAP-MTU DISCOVERY and TCP-MSS Adjustment 102 802.11 Bindings and Payloads 103 CAPWAP-Data Binding and Payloads 103 CAPWAP-Control Binding and Payloads 104 LWAPP and CAPWAP Vendor-Specific Payloads 105 Summary 105Chapter 5 Network Design Considerations 107 Controller Placement 107 Access Layer Deployments 108 Distribution Layer Deployments 109 Service Block Deployments 109 WAN Considerations 110 AP Placement 110 Dense AP Deployment Considerations 112 802.11n 114 Location Design Considerations 116 Summary 119Chapter 6 Understanding the Troubleshooting Tools 121 Troubleshooting on the WLC 121 Debugging 121 Advanced Debugging 126 mping and eping 131 Message Log 132 Trap Log 133 Statistics 135 Controller Statistics 135 AP Statistics 135 RADIUS Server Statistics 137 Port Statistics 137 Mobility Statistics 138 Packet Captures 139 WLC Config Analyzer 140 Software Bug Toolkit 141 Summary 142Chapter 7 Deploying and Configuring the Wireless LAN Controller 143 Connecting the WLC to the Switch 144 Multiple AP-Manager Support 145 LAG 148 Layer 2 and Layer 3 LWAPP Transport Modes of Operation 151 LWAPP Layer 3 Transport Mode 153 Interfaces on the WLC 156 DHCP Proxy Vs. DHCP Bridging 159 DHCP Proxy Mode 160 DHCP Bridging Mode 163 Overview and Configuration 163 Configure the Switch for the WLC 169 Troubleshooting WLC Issues 171 Summary 176Chapter 8 Access Point Registration 177 AP Discovery and Join Process 177 Troubleshooting Network Connectivity and AP Registration 181 Verifying VLAN Configuration 181 Verifying IP Addressing Information 182 Understanding the AP Discovery and AP Join Process 183 Troubleshooting the AP Discovery and AP Join Process 191 WLC Config Analyzer 197 AP Debugs 198 Debug Template 198 Summary 199Chapter 9 Mobility 201 Client Roaming/Mobility Events 202 Intra-Controller Roaming 202 Inter-Controller Roaming 202 Inter-Subnet Roaming/Layer 3 Mobility Events 202 Auto-Anchor Mobility 206 AP Groups 207 Troubleshooting AP Groups 208 Mobility Groups 210 Mobility Messaging 212 Mobility Message Types 212 Mobility Role of the Controller to the Client 213 Mobility Handoff Types 214 Mobility Packet Format 221 Error Recovery 223 Mobility Messaging Enhancements in 5.0 224 Configuring Mobility Groups 224 Configuring Auto-Anchoring 226 Determining Controllers to Add to a Mobility Group 228 Secure Mobility 228 Troubleshooting Mobility 229 PMKID Caching 238 AP Mobility 241 Primary, Secondary, and Tertiary Controllers 241 AP Load Balancing 243 AP Failover 244 Troubleshooting AP Mobility 245 Summary 247Chapter 10 Troubleshooting Client-Related Issues 249 General Client Information 249 Client Association Packet Flow 250 Client Utilities and Logging 255 AP Debugs and Show Commands 258 Wireless and Wired Sniffer Traces 261 Debug Client 262 Debug Client Variations 263 Client Connection 265 Controller Processes 265 PEM 266 APF 268 802.1x Authentication (Dot1x) 270 Debug Client Analysis 270 Troubleshooting Examples 285 Wrong Client Cipher Configuration 285 Wrong Preshared Key 287 Incorrect User Credentials with EAP 289 Summary 291Chapter 11 Wireless Voice 293 Prerequisites for Voice Deployments 293 Phone Features 295 Supported Protocols, Specifications, and Certifications 295 Security 296 Coexistence 297 QoS 297 Latency, Jitter, and Loss 298 Correct Packet Marking 298 Upstream and Downstream QoS 302 Wi-Fi Multimedia 303 TSPEC 304 Configuration 305 Controller 305 Switch Ports 311 WLAN Profile on the Phone 312 Troubleshooting 792x Voice Quality Issues 313 Basic Troubleshooting/Connectivity 313 Choppy/Lost Audio 316 One-Way Voice 319 Network Busy 321 Poor Audio When Roaming 323 Multicast Applications Fail 324 Enabling Trace Logs on the 792x 329 Troubleshooting and Monitoring Tools 337 WCS 338 Packet Capture Software 340 Spectrum Analysis Tools 341 SpectraLink and Vocera Deployments 342 SpectraLink 342 Vocera Deployments 344 Summary 347Chapter 12 Radio Resource Management 349 How RRM Works 349 RF Grouping 351 Dynamic Channel Assignment 357 TPC 358 Coverage Hole Detection 359 Enhancements to RRM 360 Configuring RRM 362 Dynamic Channel Assignment 363 Transmit Power Control (TPC) 365 Coverage 367 Profiles and Monitor Intervals 368 Overriding Global RRM 369 Troubleshooting RRM 371 SNMP Traps 371 show Commands 373 Debugs 378 Summary 389Chapter 13 H-REAP 391 H-REAP Versus REAP 392 Split MAC Versus Local MAC Architecture 392 H-REAP Modes of Operation 394 Central Versus Local Switching 395 H-REAP States of Operation 397 H-REAP Wireless Security Support 398 Configuring H-REAP 398 Controller Discovery 398 Configuring the WLAN 402 Configuring the AP 404 Configuring the Local Switch 405 H-REAP Guidelines and Limitations 408 H-REAP Enhancements 410 Backup RADIUS Server 410 H-REAP Groups 411 Local Authentication 412 Troubleshooting H-REAP 412 show Commands 414 debug Commands 422 Summary 430Chapter 14 Guest Networking 431 Web Authentication 431 Web Authentication Policies 432 Web Authentication Types 435 Web Authentication Process 436 Troubleshooting Basic Web Authentication 440 RADIUS and LDAP Authentication with Web Auth 447 Guest User Accounts 451 Custom Web Auth Splash Pages 452 Global Override 453 Browser Security Warning 454 Centralized Traffic Flow with Guest Access 458 Auto-Anchor/Guest Tunneling 458 Configuring Auto-Anchor 460 Troubleshooting Guest Tunneling 461 Wired Guest Access 467 Troubleshooting Wired Guest Access 470 Summary 471Chapter 15 Mesh 473 Mesh Code Releases 474 Mesh Deployments 474 How Mesh Works 476 Mesh Bootup and Join Process 477 Configuring Mesh 480 Ethernet Bridging 483 Troubleshooting Mesh 488 AP Join Problems 488 RF Issues 491 show Commands 492 Remote Telnet and AP Debugs 495 Ethernet Bridging Troubleshooting 497 Summary 502Appendix A Debugging Commands 503 WLC Debugs 503 Existing Debugs in Software Version 5.0 and Earlier 503 Debugs Introduced in Software Version 5.1 518 Debugs Introduced in Software Version 6.0 520 Debug Packet Logging 523 AP Debugs 526Appendix B LWAPP and CAPWAP Payloads 535 LWAPP and CAPWAP Message Payloads 544TOC, 9781587058141, 10/19/09
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