A Practical Guide to Advanced Networking

Jeffrey S. Beasley is with the Department of Engineering Technology and Surveying Engineering at New Mexico State University. He has been teaching with the department since 1988 and is the co-author of Modern Electronic Communication and Electronic Devices and Circuits, and the author of Networking.   Piyasat Nilkaew is a network engineer with 15 years of experience in network management and consulting, and has extensive expertise in deploying and integrating multiprotocol and multivendor data, voice, and video network solutions on limited budgets.  

Introduction xvi

CHAPTER 1 Network Infrastructure Design 2

  Chapter Outline 3

  Objectives 3

  Key Terms 3

INTRODUCTION 4

1-1 PHYSICAL NETWORK DESIGN 4

  Core 5

  Distribution Layer 5

  Access Layer 6

     Data Flow 6

  Selecting the Media 6

1-2 IP SUBNET DESIGN 7

  IP Address Range 8

  Determining the Number of Subnetworks Needed for the Network 9

  Determining the Size or the Number of IP Host Addresses Needed for the Network 11

  IP Assignment 15

1-3 VLAN NETWORK 16

  Virtual LAN (VLAN) 17

  VLAN Configuration 18

  VLAN Tagging 23

  802.1Q Configuration 25

  Networking Challenge: Static VLAN Configuration 26

  Configuring the HP Procurve Switch 27

1-4 ROUTED NETWORK 28

  Router 29

  Gateway Address 30

  Network Segments 31

  Multilayer Switch 32

  Layer 3 Routed Networks 33

  Routed Port Configuration 33

  InterVLAN Routing Configuration 35

  Serial and ATM Port Configuration 37

Summary 44

Questions and Problems 46

CHAPTER 2 Advanced Router Configuration I 52

  Chapter Outline 53

  Objectives 53

  Key Terms 53

Introduction 54

2-1 CONFIGURING STATIC ROUTING 54

  Gateway of Last Resort 61

  Configuring Static Routes 61

  Load Balancing and Redundancy 68

  Networking Challenge–Static Routes 70

2-2 DYNAMIC ROUTING PROTOCOLS 70

  Distance Vector Protocols 73

  Link State Protocols 74

2-3 CONFIGURING RIPv2 75

  Configuring Routes with RIP 77

  Configuring Routes with RIP Version 2 82

  Networking Challenge–RIP 84

2-4 TFTP–Trivial File Transfer Protocol 85

  Configuring TFTP 85

Summary 89

Questions and Problems 89

CHAPTER 3 Advanced Router Configuration II 98

  Chapter Outline 99

  Objectives 99

  Key Terms 99

INTRODUCTION 101

3-1 CONFIGURING LINK STATE PROTOCOLS–OSPF 101

  Link State Protocols 102

  Configuring Routes with OSPF 103

  Load Balancing and Redundancy with OSPF 109

  Networking Challenge–OSPF 111

3-2 CONFIGURING LINK STATE PROTOCOLS–IS-IS 112

  Configuring Routes with IS-IS 113

  Load Balancing and Redundancy with IS-IS 117

  Networking Challenge: IS-IS 118

3-3 CONFIGURING HYBRID ROUTING PROTOCOLS–EIGRP 119

  Configuring Routes with EIGRP 120

  Load Balancing and Redundancy 125

  Networking Challenge: EIGRP 128

3-4 ADVANCED ROUTING REDISTRIBUTION 129

  Route Redistribution into RIP 130

  Route Redistribution into OSPF 134

  Route Redistribution into EIGRP 137

  Route Redistribution into IS-IS 141

3-5 ANALYZING OSPF “HELLO” PACKETS 143

Summary 147

Questions and Problems 147

CHAPTER 4 Configuring Juniper Routers 158

  Chapter Outline 159

  Objectives 159

  Key Terms 159

INTRODUCTION 160

4-1 OPERATIONAL MODE 160

4-2 ROUTER CONFIGURATION MODE 166

  Displaying the Router Interfaces 166

  Hostname Configuration 167

  Assigning an IP Address to an Interface 168

4-3 CONFIGURING ROUTES ON JUNIPER ROUTERS 169

  Configure STATIC Routes on Juniper Routers 169

  Configure RIP on Juniper Routers 171

  Configure OSPF on Juniper Routers 173

  Configure IS-IS on Juniper Routers 175

4-4 CONFIGURING ROUTE REDISTRIBUTION ON JUNIPER ROUTERS 178

Summary 182

Questions and Problems 182

CHAPTER 5 CONFIGURING AND MANAGING THE NETWORK INFRASTRUCTURE 188

  Chapter Outline 189

  Objectives 189

  Key Terms 189

Introduction 190

5-1 DOMAIN NAME AND IP ASSIGNMENT 190

5-2 IP MANAGEMENT WITH DHCP 195

  DHCP Data Packets 197

  DHCP Deployment 201

5-3 SCALING THE NETWORK WITH NAT AND PAT 204

  Configuring NAT 205

5-4 DOMAIN NAME SERVICE (DNS) 209

  DNS Tree Hierarchy 210

  DNS Resource Records 214

Summary 220

Questions and Problems 220

CHAPTER 6 Analyzing Network Data Traffic 226

  Chapter Outline 227

  Objectives 227

  Key Terms 227

INTRODUCTION 228

6-1 PROTOCOL ANALYSIS/FORENSICS 228

  Basic TCP/UDP Forensics 234

  ARP and ICMP 236

6-2 WIRESHARK PROTOCOL ANALYZER 239

  Using Wireshark to Capture Packets 243

6-3 ANALYZING NETWORK DATA TRAFFIC 244

  Configuring SNMP 244

  NetFlow 250

6-4 FILTERING 251

  FTP Filtering 256

  Right-Click Filtering Logic Rules 258

  Filtering DHCP 260

Summary 262

Questions and Problems 262

CHAPTER 7 Network Security 266

  Chapter Outline 267

  Objectives 267

  Key Terms 267

INTRODUCTION 268

7-1 DENIAL OF SERVICE 268

  Distributed Denial of Service Attacks (DDoS) 270

    7-2 FIREWALLS AND ACCESS LISTS 270

  Network Attack Prevention 272

  Access Lists 272

7-3 Router Security 279

  Router Access 280

  Router Services 282

  Router Logging and Access-List 283

7-4 Switch Security 285

 Switch Port Security 286

  Switch Special Features 288

7-5 Wireless Security 289

7-6 VPN Security 292

  VPN Tunneling Protocols 293

  Configuring a VPN Virtual Interface (Router to Router) 294

  Troubleshooting the VPN Tunnel Link 299

Summary 302

Questions and Problems 302

CHAPTER 8 IPv6 306

  Chapter Outline 307

  Objectives 307

  Key Terms 307

Introduction 308

8-1 Comparison of IPv6 and IPv4 308

8-2 IPV6 ADDRESSING 311

8-3 IPv6 Network Settings 315

8-4 Configuring a Router for IPv6 320

8-5 IPv6 Routing 324

  IPv6: Static 324

  IPv6: RIP 324

  IPv6: OSPF 325

  IPv6: EIGRP 325

  IPv6: IS-IS 326

8-6 Troubleshooting IPv6 Connection 327

Summary 329

Questions and Problems 329

CHAPTER 9 Linux Networking 336

  Chapter Outline 337

  Objectives 337

  Key Terms 337

INTRODUCTION 338

9-1 LOGGING ON TO LINUX 339

  Adding a User Account 340

9-2 LINUX FILE STRUCTURE AND FILE COMMANDS 344

  Listing Files 344

  Displaying File Contents 346

  Directory Operations 348

  File Operations 351

  Permissions and Ownership 353

9-3 LINUX ADMINISTRATION COMMANDS 357

  The man (manual) Command 358

  The ps (processes) Command 359

  The su (substitute user) Command 362

  The mount Command 362

  The shutdown Command 364

  Linux Tips 364

9-4 ADDING APPLICATIONS TO LINUX 365

9-5 LINUX NETWORKING 371

 Installing SSH 375

  The FTP Client 376

  DNS Service on Linux 376

  Changing the Hostname 377

9-6 TROUBLESHOOTING SYSTEM AND NETWORK PROBLEMS WITH LINUX 378

  Troubleshooting Boot Processes 378

  Listing Users on the System 380

  Network Security 382

  Enabling and Disabling Boot Services 382

9-7 MANAGING THE LINUX SYSTEM 385

Summary 390

Questions and Problems 391

CHAPTER 10 Internet Routing 396

  Chapter Outline 397

  Objectives 397

  Key Terms 397

INTRODUCTION 398

10-1 INTERNET ROUTING–BGP 398

  Configuring a WAN Connection 398

  Configuring an Internet Connection 400

10-2 CONFIGURING BGP 401

  Configuring BGP 401

  Networking Challenge: BGP 409

10-3 BGP BEST PATH SELECTION 410

10-4 IPv6 OVER THE INTERNET 412

10-5 CONFIGURE BGP ON JUNIPER ROUTERS 415

Summary 421

Questions and Problems 421

CHAPTER 11 Voice over IP 428

  Chapter Outline 429

  Objectives 429

  Key Terms 429

INTRODUCTION 430

11-1 THE BASICS OF VOICE OVER IP 430

11-2 VOICE OVER IP NETWORKS 433

  Replacing an Existing PBX Tie Line 433

  Upgrading Existing PBXs to Support IP Telephony 435

  Switching to a Complete IP Telephony Solution 436

11-3 QUALITY OF SERVICE 438

  Jitter 438

Network Latency 439

  Queuing 439

  QOS Configuration Example 440

11-4 ANALYZING VoIP DATA PACKETS 442

  Analyzing VoIP Telephone Call Data Packets 446

    11-5 VoIP SECURITY 449

Summary 452

Questions and Problems 452

Key Terms Glossary 456

TOC, 9780789749048, 10/12/2012