CCNA Portable Command Guide Second Edition   All the CCNA 640-802 commands in one compact, portable resource   Preparing for the CCNA® exam? Here are all the CCNA-level commands you need in one condensed, portable resource. The CCNA Portable Command Guide, Second Edition, is filled with valuable, easy-to-access information and is portable enough for use whether you’re in the server room or the equipment closet.   This book has been completely updated to cover topics in the ICND1 640-822, ICND2 640-816, and CCNA 640-802 exams. Use this quick reference resource to help you memorize commands and concepts as you work to pass the CCNA exam. The guide summarizes all CCNA certification-level Cisco IOS® Software commands, keywords, command arguments, and associated prompts, providing you with tips and examples of how to apply the commands to real-world scenarios. Configuration examples throughout the book provide you with a better understanding of how these commands are used in simple network designs.   The ten topics covered are TCP/IP An Introduction to Cisco Devices Configuring a Router Routing Switching Implementing a Wireless LAN Network Administration and Troubleshooting Managing IP Services WANs Network Security   Scott Empson is currently the associate chair of the bachelor of applied information systems technology degree program at the Northern Alberta Institute of Technology in Edmonton, Alberta, Canada, teaching Cisco® routing, switching, and network design courses in certificate, diploma, and applied degree programs at the post-secondary level. He is also the program coordinator of the Cisco Networking Academy® Program at NAIT, a Regional Academy covering central and northern Alberta. He has earned three undergraduate degrees and currently holds several industry certifications, including CCNP®, CCDA®, CCAI, and Network+®.   Access all CCNA commands–use as a quick, offline resource for research and solutions Logical how-to topic groupings provide one-stop research Great for review before CCNA certification exams Compact size makes it easy to carry with you, wherever you go “Create Your Own Journal” section with blank, lined pages allows you to personalize the book for your needs “What Do You Want to Do?” chart inside back cover helps you to quickly reference specific tasks   This book is part of the Cisco Press® Certification Self-Study Product Family, which offers readers a self-paced study routine for Cisco® certification exams. Titles in the Cisco Press Certification Self-Study Product Family are part of a recommended learning program from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press.   Category: Cisco Press–Cisco Certification   Covers: CCNA Exam (640-822 ICND1, 640-816 ICND2, and 640-802 CCNA)

Table of Contents:
Contents Introduction xxi   Part I TCP/IP Version 4 1   Chapter 1 How to Subnet 3 Class A—E Addresses 3 Converting Between Decimal Numbers and Binary 4 Subnetting a Class C Network Using Binary 4 Subnetting a Class B Network Using Binary 8 Binary ANDing 12     So Why AND? 14     Shortcuts in Binary ANDing 15 The Enhanced Bob Maneuver for Subnetting 16   Chapter 2 VLSM 21 IP Subnet Zero 21 VLSM Example 22     Step 1 Determine How Many H Bits Will Be Needed to                 Satisfy the Largest Network 22     Step 2 Pick a Subnet for the Largest Network to Use 23     Step 3 Pick the Next Largest Network to Work With 24     Step 4 Pick the Third Largest Network to Work With 26     Step 5 Determine Network Numbers for Serial Links 27   Chapter 3 Route Summarization 29 Example for Understanding Route Summarization 29     Step 1: Summarize Winnipeg’s Routes 30     Step 2: Summarize Calgary’s Routes 31     Step 3: Summarize Edmonton’s Routes 31     Step 4: Summarize Vancouver’s Routes 32 Route Summarization and Route Flapping 34 Requirements for Route Summarization 34   Part II Introduction to Cisco Devices 35   Chapter 4 Cables and Connections 37 Connecting a Rollover Cable to Your Router or Switch 37 Terminal Settings 37 LAN Connections 38 Serial Cable Types 39 Which Cable to Use? 41 568A Versus 568B Cables 42   Chapter 5 The Command-Line Interface 45 Shortcuts for Entering Commands 45 Using the Tab Key to Complete Commands 45 Using the Question Mark for Help 46 enable Command 46 exit Command 47 disable Command 47 logout Command 47 Setup Mode 47 Keyboard Help 48 History Commands 49 show Commands 49   Part III Configuring a Router 51   Chapter 6 Configuring a Single Cisco Router 53 Router Modes 53 Entering Global Configuration Mode 54 Configuring a Router Name 54 Configuring Passwords 54 Password Encryption 55 Interface Names 56 Moving Between Interfaces 58 Configuring a Serial Interface 59 Configuring a Fast Ethernet Interface 59 Creating a Message-of-the-Day Banner 60 Creating a Login Banner 60 Setting the Clock Time Zone 60 Assigning a Local Host Name to an IP Address 61 The no ip domain-lookup Command 61 The logging synchronous Command 61 The exec-timeout Command 62 Saving Configurations 62 Erasing Configurations 62 show Commands 63 EXEC Commands in Configuration Mode: The do Command 64 Configuration Example: Basic Router Configuration 64   Part IV Routing 67   Chapter 7 Static Routing 69 Configuring a Static Route on a Router 69 The permanent Keyword (Optional) 70 Static Routes and Administrative Distance (Optional) 70 Configuring a Default Route on a Router 71 Verifying Static Routes 72 Configuration Example: Static Routes 72   Chapter 8 RIP 75 The ip classless Command 75 RIP Routing: Mandatory Commands 75 RIP Routing: Optional Commands 76 Troubleshooting RIP Issues 77 Configuration Example: RIPv2 Routing 78   Chapter 9 EIGRP 81 Configuring Enhanced Interior Gateway Routing Protocol (EIGRP) 81 EIGRP Auto-Summarization 82 Load Balancing: variance 83 Bandwidth Use 84 Authentication 84 Verifying EIGRP 86 Troubleshooting EIGRP 86 Configuration Example: EIGRP 87   Chapter 10 Single Area OSPF 91 Configuring OSPF: Mandatory Commands 91 Using Wildcard Masks with OSPF Areas 92 Configuring OSPF: Optional Commands 93     Loopback Interfaces 93     Router ID 94     DR/BDR Elections 94     Modifying Cost Metrics 95     Authentication: Simple 95     Authentication: Using MD5 Encryption 96     Timers 96     Propagating a Default Route 96 Verifying OSPF Configuration 97 Troubleshooting OSPF 98 Configuration Example: Single Area OSPF 98   Part V Switching 103   Chapter 11Configuring a Switch 105 Help Commands 105 Command Modes 105 Verifying Commands 106 Resetting Switch Configuration 107 Setting Host Names 107 Setting Passwords 107 Setting IP Addresses and Default Gateways 108 Setting Interface Descriptions 108 Setting Duplex Operation 109 Setting Operation Speed 109 Managing the MAC Address Table 109 Configuring Static MAC Addresses 109 Switch Port Security 110 Verifying Switch Port Security 111 Sticky MAC Addresses 112 Configuration Example 113   Chapter 12 VLANs 117 Creating Static VLANs 117     Using VLAN Configuration Mode 117     Using VLAN Database Mode 118 Assigning Ports to VLANs 118 Using the range Command 119 Verifying VLAN Information 119 Saving VLAN Configurations 119 Erasing VLAN Configurations 120 Configuration Example: VLANs 121   Chapter 13 VLAN Trunking Protocol and Inter-VLAN Routing 125 Dynamic Trunking Protocol (DTP) 125 Setting the Encapsulation Type 126 VLAN Trunking Protocol (VTP) 127     Using Global Configuration Mode 127     Using VLAN Database Mode 128 Verifying VTP 130 Inter-VLAN Communication Using an External Router: Router-on-a-Stick 130 Inter-VLAN Communication Tips 131 Configuration Example: Inter-VLAN Communication 132   Chapter 14 STP and EtherChannel 139 Spanning Tree Protocol 139     Enabling Spanning Tree Protocol 139     Configuring the Root Switch 140     Configuring a Secondary Root Switch 141     Configuring Port Priority 141     Configuring the Path Cost 142     Configuring the Switch Priority of a VLAN 142     Configuring STP Timers 143     Verifying STP 143     Optional STP Configurations 144     Changing the Spanning-Tree Mode 145     Extended System ID 146     Enabling Rapid Spanning Tree 146     Troubleshooting Spanning Tree 147     Configuration Example: STP 147 EtherChannel 150     Interface Modes in EtherChannel 151     Guidelines for Configuring EtherChannel 151     Configuring Layer 2 EtherChannel 152     Verifying EtherChannel 152     Configuration Example: EtherChannel 153   Part VI Extending the LAN 159   Chapter 15 Implementing a Wireless LAN 161 Wireless Access Point Configuration: Linksys 300N Access Point 161 Wireless Client Configuration: Linksys Wireless-N Notebook Adapter 174   Part VII Network Administration and Troubleshooting 183   Chapter 16 Backing Up and Restoring Cisco IOS Software and Configurations 185 Boot System Commands 185 The Cisco IOS File System 186 Backing Up Configurations to a TFTP Server 186 Restoring Configurations from a TFTP Server 187 Backing Up the Cisco IOS Software to a TFTP Server 188 Restoring/Upgrading the Cisco IOS Software from a TFTP Server 188 Restoring the Cisco IOS Software from ROM Monitor Mode Using Xmodem 189 Restoring the Cisco IOS Software Using the ROM Monitor Environmental Variables and tftpdnld Command 192   Chapter 17 Password-Recovery Procedures and the Configuration Register 193 The Configuration Register 193     A Visual Representation 193     What the Bits Mean 194     The Boot Field 194     Console Terminal Baud Rate Settings 195     Changing the Console Line Speed: CLI 195     Changing the Console Line Speed: ROM Monitor         Mode 195 Password-Recovery Procedures for Cisco Routers 196 Password Recovery for 2960 Series Switches 198   Chapter 18 Cisco Discovery Protocol (CDP) 201 Cisco Discovery Protocol 201   Chapter 19 Telnet and SSH 203 Using Telnet to Remotely Connect to Other Devices 203 Configuring the Secure Shell Protocol (SSH) 205   Chapter 20 The ping and traceroute Commands 207 ICMP Redirect Messages 207 The ping Command 207 Examples of Using the ping and the Extended ping     Commands 208 The traceroute Command 209   Chapter 21 SNMP and Syslog 211 Configuring SNMP 211 Configuring Syslog 211   Chapter 22 Basic Troubleshooting 213 Viewing the Routing Table 213 Determining the Gateway of Last Resort 214 Determining the Last Routing Update 214 OSI Layer 3 Testing 214 OSI Layer 7 Testing 215 Interpreting the show interface Command 215 Clearing Interface Counters 215 Using CDP to Troubleshoot 216 The traceroute Command 216 The show controllers Command 216 debug Commands 216 Using Time Stamps 217 Operating System IP Verification Commands 217 The ip http server Command 217 The netstat Command 218   Part VIII Managing IP Services 219   Chapter 23 Network Address Translation 221 Private IP Addresses: RFC 1918 221 Configuring Dynamic NAT: One Private to     One Public Address Translation 221 Configuring PAT: Many Private to One Public Address     Translation 223 Configuring Static NAT: One Private to One Permanent     Public Address Translation 226 Verifying NAT and PAT Configurations 227 Troubleshooting NAT and PAT Configurations 227 Configuration Example: PAT 228   Chapter 24 DHCP 231 Configuring DHCP 231 Verifying and Troubleshooting DHCP Configuration 232 Configuring a DHCP Helper Address 232 DHCP Client on a Cisco IOS Software Ethernet Interface 233 Configuration Example: DHCP 233   Chapter 25 IPv6 237 Assigning IPv6 Addresses to Interfaces 237 IPv6 and RIPng 238 Configuration Example: IPv6 RIP 239 IPv6 Tunnels: Manual Overlay Tunnel 241 Static Routes in IPv6 244 Floating Static Routes in IPv6 245 Verifying and Troubleshooting IPv6 245 IPv6 Ping 247   Part IX WANs 249   Chapter 26 HDLC and PPP 251 Configuring HDLC Encapsulation on a Serial Line 251 Configuring PPP on a Serial Line (Mandatory Commands) 251 Configuring PPP on a Serial Line (Optional Commands): Compression 252 Configuring PPP on a Serial Line (Optional Commands): Link Quality 252 Configuring PPP on a Serial Line (Optional Commands): Multilink 252 Configuring PPP on a Serial Line (Optional Commands): Authentication 252 Verifying or Troubleshooting a Serial Link/PPP Encapsulation 253 Configuration Example: PPP 254   Chapter 27 Frame Relay 257 Configuring Frame Relay 257     Setting the Frame Relay Encapsulation Type 257     Setting the Frame Relay Encapsulation LMI Type 258     Setting the Frame Relay DLCI Number 258     Configuring a Frame Relay map Statement 258     Configuring a Description of the Interface (Optional) 259     Configuring Frame Relay Using Subinterfaces 259 Verifying Frame Relay 260 Troubleshooting Frame Relay 260 Configuration Examples: Frame Relay 260   Part X Network Security 267   Chapter 28 IP Access Control List Security 269 Access List Numbers 269 Using Wildcard Masks 270 ACL Keywords 270 Creating Standard ACLs 271 Applying Standard ACLs to an Interface 272 Verifying ACLs 273 Removing ACLs 273 Creating Extended ACLs 273 Applying Extended ACLs to an Interface 275 The established Keyword (Optional) 275 Creating Named ACLs 276 Using Sequence Numbers in Named ACLs 276 Removing Specific Lines in Named ACLs Using Sequence Numbers 277 Sequence Number Tips 278 Including Comments About Entries in ACLs 278 Restricting Virtual Terminal Access 279 Configuration Examples: ACLs 279   Chapter 29 Security Device Manager 283 Security Device Manager: Connecting with CLI 283 Security Device Manager: Connecting with GUI 285 SDM Express Wizard with No CLI Preconfiguration 287 Resetting the Router to Factory Defaults Using SDM 297 SDM User Interfaces 298     Configuring Interfaces Using SDM 298     Configuring Routing Using SDM 302 SDM Monitor Mode 304 Using SDM to Configure a Router to Act as a DHCP Server 305 Using SDM to Configure an Interface as a DHCP Client 307 Using SDM to Configure NAT/PAT 312 What to Do If You Lose SDM Connectivity Because of an erase startup-config Command 314   Part XI Appendixes 315   Appendix A Binary/Hex/Decimal Conversion Chart 317 Appendix B Create Your Own Journal Here 329