ISBN-10:
1587143771
ISBN-13:
9781587143779
Pub. Date:
10/14/2013
Publisher:
Cisco Press
Interconnecting Cisco Network Devices, Part 2 (ICND2) Foundation Learning Guide / Edition 4

Interconnecting Cisco Network Devices, Part 2 (ICND2) Foundation Learning Guide / Edition 4

by John Tiso
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Overview

This Cisco-authorized, self-paced foundation learning tool helps you prepare for both the 200-101 ICND2 and 200-120 CCNA exams. It delivers the higher level of foundational knowledge you need to prepare for the ICND2 exam (and the ICND2 components in the CCNA Composite exam), and to succeed in a wide range of Cisco networking job roles.

This book teaches with numerous examples, illustrations, and real-world scenarios, helping you rapidly gain both expertise and confidence. Its coverage ranges from internetworking essentials to advanced diagnostic and debugging techniques that are needed by virtually all Cisco professionals.

The book teaches you the technology and theory for building and troubleshooting medium to large scale internetworks, including an in-depth study of VLANs as well as redundancy technologies such as HSRP, STP, and EtherChannel. Additional topics include: implementing scalable mid-sized networks; troubleshooting basic connectivity; implementing EIGRP solutions and OSPF-based scalable multiarea networks; understanding WAN technologies; managing network devices; and advanced troubleshooting.

This edition has been fully updated to reflect Cisco’s latest exam blueprints. Content has been reorganized, simplified, and expanded to help you learn even more efficiently. The book presents you with information applicable to the CCNA that can’t be found in any other CCNA text, including an overview and primer of MPLS, real-world examples, and real-world information on how to more effectively work with the Cisco TAC and diagnose software defects. The book also shows you how to use the Cisco ‘Debug’ command to learn how protocols work.

Interconnecting Cisco Network Devices, Part 2 (ICND2) Foundation Learning Guide, Fourth Edition is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction from authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining.

  • VLANs, Spanning Tree Protocol (STP), Hot Standby Routing Protocol (HSRP), and EtherChannel
  • Troubleshooting basic connectivity in IPv4, IPv6, and virtualized network environments
  • EIGRP theory, operation, and troubleshooting (IPv4 and IPv6)
  • OSPF terminology, operation, configuration, and troubleshooting (IPv4 and IPv6)
  • WAN technologies, terminology, theory, configuration, and troubleshooting
  • VPNs and WANs: comparisons and integration
  • Device management with SNMP, SYSLOG, and Cisco Flexible NetFlow
  • Cisco Integrated Service Routers: architecture, configuration management, Cisco IOS software images, and licensing
  • Advanced diagnostics, Cisco IOS software bugs, and debugging

Product Details

ISBN-13: 9781587143779
Publisher: Cisco Press
Publication date: 10/14/2013
Series: Foundation Learning Guides Series
Pages: 464
Product dimensions: 9.42(w) x 7.66(h) x 1.20(d)

About the Author

John Tiso , CCIE #5162, holds a variety of industry certifications in addition to his Cisco CCIE. These include the Cisco CCDP, Cisco CCNP-Voice, Cisco CCT, and several specializations from Cisco. He is a Microsoft MCSE and also holds certifications from CompTIA, Nortel Networks, Novell, Sun Microsystems, IBM, and HP.

John has a Graduate Citation in Strategic Management from Harvard University and a B.S. degree from Adelphi University. His writing has been published in a variety of industry journals and by Cisco Press. He has served as a technical editor for McGraw-Hill and Cisco Press. John is a past Esteemed Speaker for Cisco Networkers (Live!) and was a speaker at the National CIPTUG Conference. He has been an expert on Cisco’s “Ask the Expert” NetPro forum and a question developer for the CCIE program.

John’s current role is as a senior engineer at a Cisco Partner. He has a quarter of a centuryexperience in the technology industry, after deciding to stop carrying refrigerators in the family business. Prior to his current position, he held multiple roles while working at Cisco, including TAC Engineer, Systems Engineer, and Product Manager. While at Cisco,one of John’s last projects was as a member of the team that developed the recent updates to the CCNA program. Prior to joining Cisco, he was a lead architect and consultant for a Cisco Gold Partner.

John currently resides in Amherst, New Hampshire, with his wife Lauren and their three children, Kati, Nick, and Danny. John is a nine-time marathon finisher and also a Therapy Dog International certified handler of his therapy dog and running partner, Molly. He can be reached at johnt@jtiso.com .

Table of Contents

Introduction xviii

Chapter 1 Implementing Scalable Medium-Sized Networks 1

Understanding and Troubleshooting VLANs and VLAN Trunking 2

VLAN Overview 2

Trunk Operation 6

Configuring Trunks 7

Dynamic Trunking Protocol 8

VLAN Troubleshooting 9

Trunk Troubleshooting 10

Building Redundant Switch Topologies 11

Understanding Redundant Topologies 12

BPDU Breakdown 15

STP Types Defined 20

Per-VLAN Spanning Tree Plus 21

Analyzing and Reviewing STP Topology and Operation 24

Examining Spanning-Tree Failures 26

STP Features: PortFast, BPDU Guard, Root Guard, UplinkFast, and BackboneFast 28

Improving Redundancy and Increasing Bandwidth with EtherChannel 29

EtherChannel Protocols 31

Port Aggregation Protocol 31

Link Aggregation Control Protocol 32

Configuring EtherChannel 33

Checking EtherChannel Operation 34

Understanding Default Gateway Redundancy 36

Hot Standby Router Protocol 37

HSRP Interface Tracking 38

HSRP Load Balancing 39

HSRP in Service Deployments 39

HSRP in IPv6 40

Gateway Load-Balancing Protocol 40

Chapter Summary 42

Review Questions 42

Chapter 2 Troubleshooting Basic Connectivity 47

Troubleshooting IPv4 Basic Connectivity 48

Components of End-to-End IPv4 Troubleshooting 48

Verification of Connectivity 51

Cisco Discovery Protocol 58

Verification of Physical Connectivity Issues 60

Identification of Current and Desired Path 63

Default Gateway Issues 66

Name Resolution Issues 68

ACL Issues 71

Understanding Networking in Virtualized Computing Environments 72

Troubleshooting IPv6 Network Connectivity 75

Understanding IPv6 Addressing 75

IPv6 Unicast Addresses 76

Components of Troubleshooting End-to-End IPv6 Connectivity 78

Verification of End-to-End IPv6 Connectivity 79

Neighbor Discovery in IPv6 80

Identification of Current and Desired IPv6 Path 82

Default Gateway Issues in IPv6 82

Name Resolution Issues in IPv6 83

ACL Issues in IPv6 84

IPv6 in a Virtual Environment 86

A Last Note on Troubleshooting 86

Chapter Summary 88

Review Questions 88

Chapter 3 Implementing an EIGRP Solution 91

Dynamic Routing Review 92

Routing 92

Routing Domains 92

Classification of Routing Protocols 93

Classful Routing Versus Classless Routing 94

Administrative Distance 95

EIGRP Features and Function 98

EIGRP Packet Types 100

EIGRP Path Selection 101

Understanding the EIGRP Metric 103

EIGRP Basic Configuration 105

Verification of EIGRP Configuration and Operation 106

EIGRP Passive Interfaces 108

Load Balancing with EIGRP 111

Variance 112

Traffic Sharing 113

EIGRP Authentication 114

Troubleshooting EIGRP 115

Components of Troubleshooting EIGRP 115

Troubleshooting EIGRP Neighbor Issues 118

Troubleshooting EIGRP Routing Table Issues 121

Issues Caused by Unadvertised Routes 121

Issues Caused by Route Filtering 122

Issues Caused by Automatic Network Summarization 123

Implementing EIGRP for IPv6 124

EIGRP IPv6 Theory of Operation 124

EIGRP IPv6 Feasible Successor 128

EIGRP IPv6 Load Balancing 129

EIGRP for IPv6 Command Syntax 130

Verification of EIGRP IPv6 Operation 131

EIGRP for IPv6 Configuration Example 133

Troubleshooting EIGRP for IPv6 135

Chapter Summary 136

Review Questions 137

Chapter 4 Implementing a Scalable Multiarea Network with OSPF 143

Understanding OSPF 143

Link-State Routing Protocol Overview 144

Link-State Routing Protocol Data Structures 145

Understanding Metrics in OSPF 146

Establishment of OSPF Neighbor Adjacencies 147

Building a Link-State Database 149

OSPF Area Structure 150

OSPF Area and Router Types 150

Link-State Advertisements 153

Multiarea OSPF IPv4 Implementation 154

Single-Area vs. Multiarea OSPF 155

Stub Areas, Not So Stubby Areas, and Totally Stub Areas 155

Planning for the Implementation of OSPF 158

Multiarea OSPF Configuration 158

Multiarea OSPF Verification 160

Troubleshooting Multiarea OSPF 162

OSPF Neighbor States 162

Components of Troubleshooting OSPF 166

Troubleshooting OSPF Neighbor Issues 168

Troubleshooting OSPF Routing Table Issues 172

Troubleshooting OSPF Path Selection 174

Examining OSPFv3 176

OSPFv3 Key Characteristics 176

OSPFv3 LSAs 177

Configuring OSPFv3 178

OSPFv3 Verification 179

Chapter Summary 180

Review Questions 181

Chapter 5 Understanding WAN Technologies 185

Understanding WAN Technologies 186

WAN Architecture 188

Hub-and-Spoke Networks 188

Partial-Mesh Networks 189

Full-Mesh Networks 189

Point-to-Point Networks 191

WAN Devices 192

Serial WAN Cabling 195

WAN Layer 2 Protocols 197

Other WAN Protocols 199

Integrated Services Digital Network 199

X.25 199

Multiprotocol Label Switching 200

Service Provider Demarcation Points 200

T1/E1 200

DSL Termination 201

Cable Termination 202

Other WAN Termination 203

WAN Link Options 203

Private WAN Connection Options 204

Public WAN Connection Options 205

Metropolitan-Area Networks 207

Extranet 209

Configuring Serial Interfaces 209

Configuration of a Serial Interface 213

Integrated CSU/DSU Modules 214

Back-to-Back Routers with an Integrated CSU/DSU 217

HDLC Protocol 218

Point-to-Point Protocol 220

PPP Authentication: PAP 222

PPP Authentication: CHAP 222

PPP Configuration 223

Configuring PPP Authentication with CHAP 225

Verifying CHAP Configuration 227

Configuring Multilink PPP over Serial Lines 228

Verifying Multilink PPP 230

Troubleshooting Serial Encapsulation 232

Establishing a WAN Connection Using Frame Relay 233

Understanding Frame Relay 233

Frame Relay Topologies 236

Frame Relay Reachability and Routing Protocol Issues 237

Frame Relay Signaling 239

Frame Relay Address Mappings 240

Configuring Frame Relay 243

Point-to-Point and Multipoint Frame Relay 244

Configuring Point-to-Point Frame Relay Subinterfaces 245

Configuring Point-to-Multipoint Frame Relay 247

Verifying Frame Relay Configuration 249

Introducing Cisco VPN Solutions 252

Introducing IPsec 255

GRE Tunnels 256

Configuring a GRE Tunnel 258

GRE Tunnel Verification 260

Understanding MPLS Networking 261

Basic Troubleshooting of MPLS Services 263

Chapter Summary 264

Review Questions 265

Chapter 6 Network Device Management 269

Configuring Network Devices to Support Network Management

Protocols 270

SNMP Versions 270

Obtaining Data from an SNMP Agent 271

Monitoring Polling Data in SNMP 272

Monitoring TRAPs in SNMP 273

Sending Data to an SNMP Agent 274

SNMP MIBs 275

Basic SNMP Configuration and Verification 276

Syslog Overview 279

Syslog Message Format 281

Syslog Configuration 281

NetFlow Overview 283

NetFlow Architecture 285

NetFlow Configuration 286

Verifying NetFlow Operation 287

Router Initialization and Configuration 288

Router Internal Component Review 289

ROM Functions 291

Router Power-Up Sequence 292

Configuration Register 293

Changing the Configuration Register 294

Locating the Cisco IOS Image to Load 295

Loading a Cisco IOS Image File 297

Selecting and Loading the Configuration 300

Cisco IOS File System and Devices 302

Managing Cisco IOS Images 305

Interpreting Cisco IOS Image Filenames 305

Creating a Cisco IOS Image Backup 306

Upgrading the Cisco IOS Image 308

Managing Device Configuration Files 311

Cisco IOS Password Recovery 313

Cisco IOS Licensing 315

Licensing Overview 315

Cisco IOS Licensing and Packaging Prior to Cisco IOS 15 316

Cisco IOS 15 Licensing and Packaging 317

Obtaining Licensing 318

License Verification 320

Permanent License Installation 321

Evaluation License Installation 322

Backing Up Licenses 325

Uninstalling Permanent Licenses 325

Rehosting a License 327

Cisco IOS-XR, IOS-XE, and NX-OS 328

Cisco IOS-XR 329

Cisco IOS-XE 330

Cisco NX-OS 331

Chapter Summary 332

Review Questions 333

Chapter 7 Advanced Troubleshooting 339

Advanced Router Diagnostics 340

Collecting Cisco IOS Device Diagnostic Information 340

Using the Output Interpreter to Detect Issues 341

Researching Cisco IOS Software Defects 343

Device Debugging 345

Capturing Debugging Output 345

Verifying and Disabling Debugging 350

Limiting Debugging Output 351

ACL Triggered Debugging 351

Conditionally Triggered Debugging 356

Troubleshooting an Issue with Debugging 357

Verifying Protocol Operation with Debugging 359

Chapter Summary 361

Review Questions 361

Appendix A Answers to Chapter Review Questions 363

Appendix B Basic L3VPN MPLS Configuration and Verification 369

Glossary of Key Terms 375

TOC, 9781587143779, 8/27/2013

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