Todd Lammle's CCNA/CCENT IOS Commands Survival Guide: Exams 100-101, 200-101, and 200-120

Overview

Your Guide to CCENT and CCNA IOS Commands

This book is an ideal supplement to Todd Lammle’s CCENT and CCNA Study Guides, and a great quick reference for any Cisco networking administrator. Covering IOS version 15, each chapter begins with a short introduction, explaining what tasks will be discussed, followed by detailed explanations of and examples of the commands. The book includes an easy-to-navigate table ...

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Overview

Your Guide to CCENT and CCNA IOS Commands

This book is an ideal supplement to Todd Lammle’s CCENT and CCNA Study Guides, and a great quick reference for any Cisco networking administrator. Covering IOS version 15, each chapter begins with a short introduction, explaining what tasks will be discussed, followed by detailed explanations of and examples of the commands. The book includes an easy-to-navigate table of commands broken into the following topic areas:

  • Internetworking and TCP/IP
  • Cisco command line interface (CLI) and Security Device Manager (SDM)
  • Router Configuration
  • LAN Switch Configuration
  • Advanced IOS and Troubleshooting
  • Access Lists
  • Network Address Translation
  • Wireless
  • Wide Area Networks
  • Security
  • IPv6

Whether you are studying for your CCENT or CCNA certification, or are a seasoned Cisco networking administrator, this IOS Commands Survival Guide is the perfect reference to help you achieve your goals.

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Editorial Reviews

From Barnes & Noble
If you want to pass your CCNA the first time -- and truly be effective as a Cisco network professional -- you can't treat IOS as an afterthought or necessary evil. You need to dive in, get comfortable, really master Cisco's command line interface. That's where this book comes in. This is no mere command reference: Todd Lammle organizes it by task, not command -- helping you quickly get answers and solve problems. Moreover, he's written it with the CCNA in mind: These are techniques you'll need to ace your certification exam.

Lammle takes you from the basics (booting a router, entering setup and router configuration modes, configuring hostnames and passwords) all the way to sophisticated IP routing, VLANs, and security. Using hundreds of commands and output examples, he helps you work with EIGRP and OSPF; configure Layer-2 switching and STP; set up static and dynamic NAT; and securely configure Cisco wireless technologies. There's even a full chapter on IPv6, which is on the CCNA exam even if it's not in your network yet.

If you're still looking for alternatives to the command line, Lammle thoroughly introduces Security Device Manager (SDM), Cisco's free web-based tool for device management and troubleshooting. Whether you're a command-line maven or not, you'll find something useful in SDM -- probably, quite a lot.

Lammle, of course, is singularly well-qualified to write a book like this. His CCNA prep guides have been translated into 12 languages; his company trains thousands of Cisco certification candidates every year. Lammle and his colleagues know more about CCNA certification than anyone -- and few people know more about IOS, either. Bill Camarda, from the December 2007 Read Only

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Product Details

  • ISBN-13: 9781118820049
  • Publisher: Wiley
  • Publication date: 2/24/2014
  • Edition description: Portable Edition
  • Edition number: 2
  • Pages: 264
  • Sales rank: 301,819
  • Product dimensions: 7.30 (w) x 9.10 (h) x 0.70 (d)

Meet the Author

Todd Lammle, CCSI, CCNA/CCNP R/S, CCNA/CCNP Voice, CCNA/CCNP Data Center, CCNA/CCNP Wireless, CCNA/CCNP Security, is the authority on Cisco networking. His three decades of real-world experience is prevalent in his writing. He is an experienced networking engineer with practical experience working for the largest networks in the world at such companies as Xerox, Hughes Aircraft, Texaco, AAA, Cisco, and Toshiba, among others. Todd has published over 60 books, including the best-selling CCNA Study Guide. You can reach Todd at www.lammle.com.

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Table of Contents

Introduction xi

Chapter 1 Basic IOS Commands 1

Booting the Router 2

Setup Mode 4

Router Configuration Modes 4

Editing and Help Features 6

Configuring a Router 8

Hostnames 9

Banners 9

Passwords 10

Router Interfaces 14

Viewing, Saving, and Erasing Configurations 18

Using the show Command 19

Troubleshooting with the show interfaces Command 22

Chapter 2 Managing a Cisco Internetwork 25

Understanding the Internal Components of a Cisco Router 26

Managing the Configuration Register 27

Checking the Current Configuration Register Value 27

Changing the Configuration Register 28

Recovering Passwords 30

Using Boot System Commands 32

Backing Up and Restoring the Cisco IOS 33

Verifying Flash Memory 33

Backing Up the Cisco IOS 34

Restoring or Upgrading the Cisco Router IOS 36

Using the Cisco IOS File System (Cisco IFS) 36

Backing Up and Restoring the Cisco Configuration 39

Backing Up the Cisco Router Configuration 39

Restoring the Cisco Router Configuration 41

Erasing the Configuration 41

Using the Cisco IOS File System to Manage Your

Router's Configuration (Cisco IFS) 42

Using Cisco Discovery Protocol (CDP) 43

Getting CDP Timers and Holdtime Information 44

Gathering Neighbor Information 45

Gathering Interface Traffic Information 47

Gathering Port and Interface Information 47

Using Telnet 48

Telnetting into Multiple Devices Simultaneously 49

Checking Telnet Connections 50

Checking Telnet Users 50

Closing Telnet Sessions 51

Resolving Hostnames 52

Building a Host Table 52

Using DNS to Resolve Names 54

Checking Network Connectivity and Troubleshooting 55

Using the ping Command 56

Using the traceroute Command 56

Debugging 57

Using the sh processes Command 59

Chapter 3 IP Routing 61

Routing Basics 62

Static Routing 65

Default Routing 67

Routing Protocol Basics 69

Administrative Distances (ADs) 69

Routing Information Protocol (RIP) 70

RIP Timers 71

Enabling RIP 72

Holding Down RIP Propagations 73

RIP Version 2 (RIPv2) 73

Verifying RIP 75

The show ip protocols Command 75

The debug ip rip Command 76

Chapter 4 Enhanced IGRP (EIGRP) and Open Shortest Path First (OSPF) 79

Understanding EIGRP Basics 80

Configuring EIGRP 80

Holding Down EIGRP Propagations 81

Setting Maximum Paths and Hop Count 82

Using Redistribution Commands 83

Configuring Discontiguous Networks 84

Load Balancing with EIGRP 85

Using Route Authentication with EIGRP 89

Verifying EIGRP 90

Understanding Open Shortest Path First (OSPF) Basics 94

Configuring OSPF 95

Enabling OSPF 95

Configuring OSPF Areas 96

Verifying OSPF Configuration 96

Using the show ip ospf Command 98

Using the show ip ospf database Command 99

Using the show ip ospf interface Command 99

Using the show ip ospf neighbor Command 100

Using the show ip protocols Command 101

Debugging OSPF 102

Chapter 5 Layer-2 Switching and Spanning-Tree Protocol (STP) 105

Switching Services 106

Three Switch Functions at Layer 2 107

Basic Switch Configurations 108

Switch Security 109

Spanning-Tree Operations 111

Optimizing Spanning-Tree Operations 113

EtherChannel 117

Verifying Cisco Catalyst Switches 119

Chapter 6 Virtual LANs (VLANs) 127

Understanding VLAN Basics 128

Configuring VLANs 128

Verifying VLAN Creation 130

Assigning Switch Ports to VLANs 130

Configuring Trunk Ports 132

Configuring Inter-VLAN Routing 136

Configuring VTP 137

Telephony: Configuring Voice VLANs 139

Configuring the Voice VLAN 140

Chapter 7 Security 143

Perimeter Routers, Firewalls, and Internal Routers 144

Recognizing Security Threats 144

Using Cisco IOS Firewall 146

Introduction to Access Lists 147

Standard Access Lists 148

Wildcard Masking 150

Controlling VTY (Telnet) Access 151

Extended Access Lists 151

Named Access Lists 157

Switch Port ACLs 159

Time-Based ACLs 161

Monitoring Access Lists 163

Chapter 8 Network Address Translation (NAT) 167

When Do We Use NAT? 168

Types of Network Address Translation 169

NAT Names 170

Static NAT Configuration 171

Dynamic NAT Configuration 172

PAT (Overloading) Configuration 173

Simple Verification of NAT 174

Chapter 9 Internet Protocol Version 6 (IPv6) 177

Why Do We Need IPv6? 178

IPv6 Addressing and Expressions 179

Shortened Expression 180

Configuring Cisco Routers with IPv6 181

Stateless Auto Configuration 182

IPv6 Static Routing 182

IPv6 Routing Protocols 183

RIPng 183

EIGRPv6 184

OSPFv3 185

Verifying RIPng 187

Verifying EIGRPv6 190

Verifying OSPFv3 191

Chapter 10 Wide Area Networks (WANs) 195

Introduction to Wide Area Networks 196

Defining WAN Terms 197

WAN Support 197

Point-to-Point Serial Links 200

High-Level Data-Link Control (HDLC) Protocol 201

Point-to-Point Protocol (PPP) 202

Configuring PPP on Cisco Routers 203

Configuring PPP Authentication 204

Verifying PPP Encapsulation 205

Introduction to Frame Relay Technology 210

Frame Relay Encapsulation Types 211

Data Link Connection Identifiers (DLCIs) 212

Local Management Interface (LMI) 213

Frame Relay Implementation and Monitoring 216

GRE Tunnels 225

Verifying a GRE Tunnel 226

Chapter 11 IP Services 227

Network Monitoring and Management Services 228

Simple Network Management Protocol (SNMP) 228

Syslog 230

First Hop Redundancy and Load Balancing 231

Hot Standby Routing Protocol (HSRP) 232

Gateway Load Balancing Protocol (GLBP) 234

Index 237

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