All key CCNA commands at your fingertips Quick reference for CCNA exam study customized for the Cisco Networking Academy classroom Long-term reference guide for the workplace and after passing the exam Examples of how to use the commands are listed for additional help This CCNA Command Quick Reference contains all of the commands that are taught in the Cisco Networking Academy Program CCNA curriculum, with examples on how to apply them to a real-world situation. This book is not meant to replace any teaching materials but rather serve as a supplementary guide to the course curriculum. As a quick reference, it will provide students and professionals easy access to the proper use of all the commands that are presented to them within the CCNA curriculum and exam. The book will cover CCNA semesters 2-4 (as the first semester does not introduce any commands.) This edition is based on the current version 3.1 of the curriculum.The book will parallel the flow of topics and structure of the online curriculum; as commands are taught in the curriculum, they will be presented in the Quick Reference, showing the following: A.)
The command itself, along with keywords and optional sub-commands B.)Where it can be used (showing the prompt to give a frame of reference).Throughout the book there will be Configuration Examples given to the reader, which will summarize the previous group of commands visually by having a diagram of a network with command outputs, showing all of the commands needed to create that network, showing what commands to use, where to use them, and a summary of why we are using the commands. This allows the student to see all of the commands in one location, instead of having to flip though a bunch of different pages. Scott Empson is an instructor in the Department of Telecommunications at the Northern Alberta Institute of Technology in Edmonton, Alberta, Canada. He teaches Cisco Routing, Switching, and Network Design courses to students at the post-secondary level. He possesses three undergraduate degrees: A Bachelor of Arts, with a Major in English; a Bachelor of Education, again with a Major in English/Language Arts; and a Bachelor of Applied Information Systems Technology, with a Major in Network Management. His industry certifications are CCNP, CCDA, CCAI, and Network+.
After this project he plans on attending the University of Alberta to complete his Masters Degree in Science in Internetworking
Table of Contents:
Introduction
Part I CCNA 1
Part II CCNA 2
Chapter 1 WANs and Routers
Connecting a Rollover Cable to Your Router or Switch
Terminal Settings
LAN Connections
Serial Cable Types
Which Cable to Use?
OS IP Verification Commands
Chapter 2 Introduction to Routers
Shortcuts for Entering Commands
Using the † Key to Complete Commands
Using the Question Mark for Help
enable Command
exit Command
disable Command
logout Command
Setup Mode
Keyboard Help
History Commands
show Commands
Chapter 3 Configuring a Router
Router Modes
Global Configuration Mode
Configuring a Router Name
Configuring Passwords
Password Encryption
show Commands
Interface Names
Moving Between Interfaces
Configuring a Serial Interface
Configuring an Ethernet/Fast Ethernet Interface
Creating a MOTD Banner
Setting the Clock Time Zone
Assigning a Local Host Name to an IP Address
no ip domain-lookup Command
logging synchronous Command
exec-timeout Command
Saving Configurations
Erasing Configurations
Configuration Example: Basic Router Configuration
Chapter 4 Learning About Other Devices
Cisco Discovery Protocol
Telnet
ping
traceroute
Chapter 5 Managing Cisco IOS Software
Boot System Commands
Configuration Register
Cisco IOS Software Prerelease 12.0 Commands Versus Cisco IOS Software 12.x Commands
Backing Up Configurations
Restoring Configurations
Backing Up IOS to a TFTP Server
Restoring/Upgrading IOS from a TFTP Server
Restoring IOS from ROMmon Mode Using Xmodem
Restoring the IOS Using the ROMmon Environmental Variables and tftpdnld Command
Password Recovery Procedures
Chapter 6 Routing and Routing Protocols
Static Routing
Default Routing
Verifying Static Routes
Configuration Example: Static Routes
Chapter 7 Distance Vector Routing Protocols
IP Classless
RIP Routing: Mandatory Commands
RIP Routing: Optional Commands
RIP Version 2
Troubleshooting RIP Issues
IGRP Routing: Mandatory Commands
IGRP Routing: Optional Commands
Troubleshooting IGRP Issues
Dynamic Routing Protocol Options
Troubleshooting Dynamic Routing Protocol Issues
Verifying Routing
Configuration Example: Dynamic Routing
Chapter 8 TCP/IP Suite Error and Control Messages
ICMP Redirect Messages
ping Command
Chapter 9 Basic Router Troubleshooting
Viewing the Routing Table
Determining the Gateway of Last Resort
Determining the Last Routing Update
OSI Layer 3 Testing
OSI Layer 7 Testing
Using CDP to Troubleshoot
traceroute Command
show controllers Command
debug Commands
Chapter 10 Intermediate TCP/IP
ip http server Command
netstat Command
Chapter 11 Access Control Lists (ACLs)
Access List Numbers
Wildcard Masks
ACL Keywords
Creating Standard ACLs
Applying a Standard ACL to an Interface
Verifying ACLs
Removing An ACL
Creating Extended ACLs
Applying an Extended ACL to an Interface
Creating Named ACLs
Restricting Virtual Terminal Access
Configuration Example: Access Control Lists
Configuration Example: CCNA 2
Part III CCNA 3
Chapter 1 Introduction to Classless Routing
Variable-Length Subnet Masking (VLSM)
Subnet Zero
RIP Version 2: Mandatory Commands
RIP Version 2: Optional Commands
Configuration Example: RIP-2 Routing
Chapter 2 Single-Area OSPF
OSPF Routing: Mandatory Commands
Using Wildcard Masks with OSPF Areas
OSPF Routing: Optional Commands
Loopback Interfaces
OSPF DR/BDR Election
Modifying OSPF Cost Metrics
OSPF Authentication: Simple
OSPF Authentication Using MD5 Encryption
OSPF Timers
Propagating a Default Route
Verifying OSPF Configuration
Troubleshooting OSPF
Configuration Example: Single-Area OSPF
Chapter 3 EIGRP
Configuring EIGRP
EIGRP Auto Summarization
Verifying EIGRP
Troubleshooting EIGRP
Configuration Example: EIGRP
Chapter 4 Switching Concepts
Chapter 5 Switches
Chapter 6 Switch Configuration
Help Commands
Command Modes
Verifying Commands
Resetting Switch Configuration
Setting Host Names
Setting Passwords: 1900 Series Switches
Setting Passwords: 2900/2950 Series Switches
Setting IP Address and Default Gateway
Setting Interface Descriptions
Setting Duplex Settings: 1900 or 2900/2950 Series Switches
Setting Speed Settings: 2900/2950 Series Switches
Setting Web-Based Interface for Configuration: 1900 and 2900/ 2950 Series Switches
Managing the MAC Address Table: 1900 and 2900/2950 Series Switches
Configuring Static MAC Addresses
Port Security: 1900 Series Switches
Verifying Port Security
Upgrading Catalyst 1900 Firmware with a TFTP Server
Copying IOS to TFTP Server
Restoring/Upgrading IOS/Startup-Config from TFTP Server
Password Recovery for 1900 Series Switches
Password Recovery for 2900/2950 Series Switches
Firmware Upgrade of Catalyst 2950 Series Switches
Configuration Example: 2900 Series Switch
Chapter 7 Spanning Tree Protocol
Spanning-Tree Verification
Change Spanning-Tree Priority of a Switch
Changing the Stage of Spanning Tree on an Interface
Chapter 8 Virtual LANs
Displaying VLAN Information
Creating Static VLANs
Assigning Ports to VLANs
Assigning Ports Using the range Command (2950 Switch Only)
Saving VLAN Configurations
Erasing VLAN Configurations
Troubleshooting VLANs
Configuration Example: 2900 Switch Configuration
Chapter 9 VLAN Trunking Protocol
Configuring ISL Trunks
Configuring Dot1Q Trunks
Verifying Trunking
VTP Configuration
Confirming VTP Configuration
Inter-VLAN Communication: Router-on-a-Stick
Router-on-a-Stick Tips
Configuration Example: VTP and Inter-VLAN Routing
Part IV CCNA 4
Chapter 1 Scaling IP Technologies
Configuring Dynamic NAT: One Private to One Public Address Translation
Configuring PAT: Many Private to One Public Address Translation
Configuring Static NAT: One Private to One Permanent Public Address Translation
Verifying NAT and PAT Configuration
Troubleshooting NAT and PAT Configuration
Configuring DHCP
Verifying and Troubleshooting DHCP Configuration
Configuring a DHCP Helper Address
Configuration Example: Port Address Translation
Chapter 2 WAN Technologies
Chapter 3 PPP
Configuring HDLC Encapsulation on a Serial Line
Configuring PPP on a Serial Line (Mandatory Commands)
Configuring PPP on a Serial Line (Optional Commands): Compression
Configuring PPP on a Serial Line (Optional Commands): Link Quality
Configuring PPP on a Serial Line (Optional Commands): Multilink
Configuring PPP on a Serial Line (Optional Commands): Authentication
Verifying or Troubleshooting a Serial Link/PPP Encapsulation
Configuration Example: PPP
Chapter 4 ISDN and DDR
Configuring ISDN BRI: Setting the Switch Type
Configuring ISDN BRI: Setting SPIDs
Configuring ISDN PRI
Verifying ISDN Configuration
Troubleshooting ISDN
Configuring Legacy DDR
Configuring Dialer Profiles with DDR
Configuration Example: ISDN and DDR with No Dialer Profiles
Chapter 5 Frame Relay
Configuring Frame Relay: Setting the Frame Relay Encapsulation Type
Configuring Frame Relay: Setting the Frame Relay Encapsulation LMI Type
Configuring Frame Relay: Setting the Frame Relay DLCI Number
Configuring a Frame Relay Map
Configuring a Description of the Interface (Optional)
Configuring Frame Relay Using Subinterfaces
Verifying Frame Relay
Troubleshooting Frame Relay
Configuration Example: Frame Relay
Chapter 6 Introduction to Network Administration
Configuring SNMP
Configuring Syslog
Part V Appendixes
Appendix A Subnetting
Class A–E Addresses
Converting Between Decimal Numbers and Binary
Subnetting a Class C Network Using Binary
Subnetting a Class B Network Using Binary
The Enhanced Bob Maneuver for Subnetting (or How to Subnet Anything in Under a Minute)
Appendix B VLSM
IP Subnet Zero
VLSM Example
Step 1 Determine How Many H Bits Will Be Needed to Satisfy the Largest Network
Step 2 Pick a Subnet for the Largest Network to Use
Step 3 Pick the Next Largest Network to Work With
Step 4 Pick the Third Largest Network to Work With
Step 5 Determine Network Numbers for Serial Links
About the Author :
Scott Empson, CCDA, CCNP, CCAI, Network+, is an instructor in the telecommunications department at the Northern Alberta Institute of Technology in Edmonton, Alberta, Canada. He teaches Cisco routing, switching, and network design courses to students at the post-secondary level. Scott holds three undergraduate degrees: a bachelor of arts, with a major in English; a bachelor of education, with a major in English/language arts; and a bachelor of applied information systems technology, with a major in network management. After this project he plans to return to school to complete his master's degree.
