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Cisco Press
CCNP BCMSN Official Exam Certification Guide / Edition 4

CCNP BCMSN Official Exam Certification Guide / Edition 4

by David Hucaby


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CCNP BCMSN Official Exam Certification Guide

Fourth Edition

  • Master all 642-812 exam topics with the official study guide
  • Assess your knowledge with chapter-opening quizzes
  • Review key concepts with foundation summaries
  • Practice with hundreds of exam questions on the CD-ROM

David Hucaby, CCIE® No. 4594

CCNP BCMSN Official Exam Certification Guide, Fourth Edition, is a best of breed Cisco® exam study guide that focuses specifically on the objectives for the BCMSN exam. Successfully passing the BCMSN 642-812 exam certifies that you have knowledge and skills necessary to implement scalable multilayer switched networks.

CCNP BCMSN Official Exam Certification Guide, Fourth Edition, follows a logical organization of the BCMSN exam objectives. Material is presented in a concise manner, focusing on increasing readers’ retention and recall of exam topics. Lead network engineer and consultant David Hucaby shares preparation hints and test-taking tips, helping you identify areas of weakness and improve your switching knowledge through the use of the consistent features in each chapter. “Do I Know This Already?” quizzes open each chapter and allow you to decide how much time you need to spend on each section. Exam topic lists and Foundation Summary tables make referencing easy and give you a quick refresher whenever you need it. Scenario-based exercises help you think about exam objectives in real-world situations, thus increasing recall during exam time. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts.

The companion CD-ROM contains a powerful testing engine that enables you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback on a module-by-module basis, presenting question-by-question remediation to the text.

Well regarded for its level of detail, assessment features, and challenging review questions and exercises, this book helps you master the concepts and techniques that will enable you to succeed on the exam the first time.

David Hucaby, CCIE® No. 4594, is a lead network engineer for a large medical environment using Cisco multilayer switching and security products. He also is an independent networking consultant focusing on Cisco-based solutions for healthcare and banking clients.

The official study guide helps you master all the topics on the BCMSN exam, including

  • Spanning Tree Protocol concepts
  • Virtual LAN (VLAN), VLAN trunking, and inter-VLAN routing
  • Gateway redundancy technologies and protocols
  • Wireless LAN topologies, components, connectivity, and standards
  • Implementing a Cisco Unified Wireless Network
  • Wireless client access
  • Access layer voice concepts
  • Preventing and mitigating attacks against switched network security

Companion CD-ROM

The CD-ROM contains an electronic copy of the book and more than 200 practice questions for the BCMSN exam, including simulation-based questions, all available in study mode, test mode, and flash card format.

This volume is part of the Exam Certification Guide Series from Cisco Press®. Books in this series provide officially developed exam preparation materials that offer assessment, review, and practice to help Cisco Career Certification candidates identify weaknesses, concentrate their study efforts, and enhance their confidence as exam day nears.

Category: Cisco Certification

Covers: BCMSN Exam 642-812

$59.99 USA / $74.99 CAN

Product Details

ISBN-13: 9781587201714
Publisher: Cisco Press
Publication date: 01/12/2007
Series: Exam Certification Guide Series
Edition description: Revised Edition
Pages: 672
Product dimensions: 7.50(w) x 9.40(h) x 1.80(d)

About the Author

David Hucaby, CCIE No. 4594, is a lead network engineer for the University of Kentucky, where he works with healthcare networks based on the Cisco Catalyst, IP telephony, PIX, and VPN product lines. David has a bachelor of science degree and master of science degree in electrical engineering from the University of Kentucky. He is the author of three previous books for Cisco Press, including Cisco ASA and PIX Firewall Handbook, Cisco Field Manual: Router Configuration, and Cisco Field Manual: Catalyst Switch Configuration.

David lives in Kentucky with his wife, Marci, and two daughters.

Table of Contents



Part I Overview and Design of a Campus Network

Chapter 1 Campus Network Overview

"Do I Know This Already?" Quiz

Switching Functionality

Layer 2 Switching

Layer 3 Routing

Layer 3 Switching

Layer 4 Switching

Multilayer Switching

Campus Network Models

Shared Network Model

LAN Segmentation Model

Network Traffic Models

Predictable Network Model

Hierarchical Network Design

Access Layer

Distribution Layer

Core Layer

Chapter 2 Modular Network Design

"Do I Know This Already?" Quiz27

Modular Network Design31

Switch Block32

Core Block35

Core Size in a Campus Network38

Other Building Blocks39

Can I Use Layer 2 Distribution Switches?41

Evaluating an Existing Network42

Discovering the Network Topology43

Migrating to a Hierarchical Design47

Part II Building a Campus Network

Chapter 3 Switch Operation

"Do I Know This Already?" Quiz57

Layer 2 Switch Operation61

Transparent Bridging61

Follow That Frame!63

Multilayer Switch Operation65

Types of Multilayer Switching65

Follow That Packet!66

Multilayer Switching Exceptions68

Tables Used in Switching69

Content Addressable Memory69

Ternary Content Addressable Memory70

Troubleshooting Switching Tables74

CAM Table Operation74

TCAM Operation75

Chapter 4 Switch Port Configuration

"Do I Know This Already?" Quiz81

Ethernet Concepts85

Ethernet (10 Mbps)85

Fast Ethernet86

Gigabit Ethernet89

10-Gigabit Ethernet90

Connecting Switch Block Devices92

Console Port Cables/Connectors92

Ethernet Port Cables and Connectors92

Gigabit Ethernet Port Cables and Connectors93

Switch Port Configuration94

Selecting Ports to Configure94

Identifying Ports96

Port Speed96

Port Duplex Mode97

Managing Error Conditions on a Switch Port97

Enable and Use the Switch Port99

Troubleshooting Port Connectivity100

Chapter 5 VLANs and Trunks

"Do I Know This Already?" Quiz109

Virtual LANs113

VLAN Membership114

Deploying VLANs117

VLAN Trunks119

VLAN Frame Identification121

Dynamic Trunking Protocol123

VLAN Trunk Configuration124

VLAN Trunk Configuration124

Troubleshooting VLANs and Trunks128

Chapter 6 VLAN Trunking Protocol

"Do I Know This Already?" Quiz135

VLAN Trunking Protocol139

VTP Domains139

VTP Modes139

VTP Advertisements140

VTP Configuration144

Configuring a VTP Management Domain145

Configuring the VTP Mode145

Configuring the VTP Version146

VTP Configuration Example148

VTP Status148

VTP Pruning149

Enabling VTP Pruning151

Troubleshooting VTP152

Chapter 7 Aggregating Switch Links

"Do I Know This Already?" Quiz159

Switch Port Aggregation with EtherChannel164

Bundling Ports with EtherChannel165

Distributing Traffic in EtherChannel165

Configuring EtherChannel Load Balancing167

EtherChannel Negotiation Protocols169

Port Aggregation Protocol169

Link Aggregation Control Protocol169

EtherChannel Configuration170

Configuring a PAgP EtherChannel170

Configuring a LACP EtherChannel171

Troubleshooting an EtherChannel172

Chapter 8 Traditional Spanning Tree Protocol

"Do I Know This Already?" Quiz181

IEEE 802.1D Overview185

Bridging Loops185

Preventing Loops with Spanning Tree Protocol189

Spanning-Tree Communication: Bridge Protocol Data Units189

Electing a Root Bridge191

Electing Root Ports192

Electing Designated Ports195

STP States197

STP Timers199

Topology Changes200

Types of STP206

Common Spanning Tree206

Per-VLAN Spanning Tree206

Per-VLAN Spanning Tree Plus207

Chapter 9 Spanning Tree Configuration

"Do I Know This Already?" Quiz215

STP Root Bridge219

Root Bridge Placement219

Root Bridge Configuration223

Spanning-Tree Customization226

Tuning the Root Path Cost227

Tuning the Port ID228

Tuning Spanning-Tree Convergence229

Modifying STP Timers230

Redundant Link Convergence232

PortFast: Access-Layer Nodes233

UplinkFast: Access-Layer Uplinks234

BackboneFast: Redundant Backbone Paths236

Troubleshooting STP237

Chapter 10 Protecting the Spanning Tree†Protocol Topology

"Do I Know This Already?" Quiz243

Protecting Against Unexpected BPDUs247

Root Guard247

BPDU Guard248

Protecting Against Sudden Loss of BPDUs250

Loop Guard250


Using BPDU Filtering to Disable STP on a Port254

Troubleshooting STP Protection254

Chapter 11 Advanced Spanning Tree Protocol

"Do I Know This Already?" Quiz259

Rapid Spanning Tree Protocol263

RSTP Port Behavior263

BPDUs in RSTP265

RSTP Convergence265

Topology Changes and RSTP269

RSTP Configuration270

Rapid Per-VLAN Spanning Tree Protocol270

Multiple Spanning Tree Protocol272

MST Overview274

MST Regions274

Spanning Tree Instances Within MST275

MST Configuration277

Part III Layer 3 Switching

Chapter 12 Multilayer Switching

"Do I Know This Already?" Quiz287

InterVLAN Routing291

Types of Interfaces292

Configuring InterVLAN Routing292

Multilayer Switching with CEF295

Traditional MLS Overview295

CEF Overview295

Forwarding Information Base296

Adjacency Table299

Packet Rewrite302

Configuring CEF303

Fallback Bridging303

Verifying Multilayer Switching304

Verifying InterVLAN Routing304

Verifying CEF307

Verifying Fallback Bridging308

Chapter 13 Router, Supervisor, and Power Redundancy

"Do I Know This Already?" Quiz313

Router Redundancy in Multilayer Switching317

Packet Forwarding Review317

Hot Standby Router Protocol318

Virtual Router Redundancy Protocol327

Gateway Load Balancing Protocol330

Verifying Gateway Redundancy338

Redundancy Within a Switch Chassis339

Redundant Switch Supervisors339

Redundant Power Supplies343

Part IV Campus Network Services

Chapter 14 IP Telephony

"Do I Know This Already?" Quiz353

Power over Ethernet (PoE)357

How Power over Ethernet Works357

Detecting a Powered Device358

Supplying Power to a Device359

Configuring Power over Ethernet360

Verifying Power over Ethernet360

Voice VLANs361

Voice VLAN Configuration362

Verifying Voice VLAN Operation364

Voice QoS366

QoS Overview366

Best-Effort Delivery367

Integrated Services Model368

Differentiated Services Model368

DiffServ QoS369

Layer 2 QoS Classification369

Layer 3 QoS Classification with DSCP370

Implementing QoS for Voice372

Configuring a Trust Boundary374

Using Auto-QoS to Simplify a Configuration375

Verifying Voice QoS378

Chapter 15 Securing Switch Access

"Do I Know This Already?" Quiz385

Port Security389

Port-Based Authentication392

802.1x Configuration393

802.1x Port-Based Authentication Example394

Mitigating Spoofing Attacks395

DHCP Snooping395

Best Practices for Securing Switches401

Chapter 16 Securing with VLANs

"Do I Know This Already?" Quiz409

VLAN Access Lists413

VACL Configuration413

Private VLANs414

Private VLAN Configuration416

Configure the Private VLANs417

Associate Ports with Private VLANs417

Associate Secondary VLANs to a Primary VLAN SVI419

Securing VLAN Trunks420

Switch Spoofing420

VLAN Hopping422

Part V Wireless LANs

Chapter 17 Wireless LAN Overview

"Do I Know This Already?" Quiz431

Wireless LAN Basics435

Comparing Wireless and Wired LANs435

Avoiding Collisions in a WLAN436

WLAN Building Blocks438

Access Point Operation441

Wireless LAN Cells442

An Introduction to Wireless LAN RF445

Basic RF Operation445

RF Characteristics447

RF Signal Strength Terminology452

WLAN Antennas457

WLAN Standards459

Regulatory Agencies459

WLAN Frame Types and Sizes460




Additional 802.11 Standards464

Chapter 18 Wireless Architecture and Design

"Do I Know This Already?" Quiz471

WLAN Security475

Legacy Security476

EAP-Based Security Methods477



Wireless Client Operation481

AP Association and Roaming482

The Roaming Process484

Roaming Implications486

Cell Layout and Channel Usage487

Sizing AP Cells488

WLAN Channel Layout489

Chapter 19 Cisco Unified Wireless Network

"Do I Know This Already?" Quiz497

Traditional WLAN Architecture501

Cisco Unified Wireless Network Architecture503

WLC Functions506

Lightweight AP Operation508

Traffic Patterns in a Cisco Unified Wireless Network509

Lightweight AP Association and Roaming511

Intra-Controller Roaming512

Inter-Controller Roaming514

Mobility Groups518

Basic Wireless LAN Configuration518

WLC Configuration519

LAP Configuration524

Part VI Scenarios for Final Preparation

Chapter 20 Scenarios for Final Preparation

Scenario 1: Trunking and DTP535

Scenario 2: VLANs, Trunking, and VTP536

Scenario 3: EtherChannels537

Scenario 4: Traditional STP538

Scenario 5: Advanced STP539

Scenario 6: Router Redundancy with HSRP, VRRP, and GLBP540

Scenario 7: IP Telephony in a Switched Network541

Scenario 8: Securing Access and Managing Traffic in a Switched Network541

Scenario 9: Implementing a Wireless LAN542

Scenario 1 Answers544

Scenario 2 Answers544

Scenario 3 Answers545

Scenario 4 Answers545

Scenario 5 Answers547

Scenario 6 Answers547

Scenario 7 Answers548

Scenario 8 Answers549

Scenario 9 Answers551

Part VII Appendix

Appendix A Answers to Chapter 'Do I Know This Already?' Quizzes and Q&A Sections

1587201712 TOC 11/16/2006

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