Practical Guide to Advanced Networking, A (paperback)

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