CCNA 1 v7.0 Curriculum: Module 2 - Basic Switch and End
Device Configuration
Apr 1,2020 Last Updated: May 2, 2023 CCNA v7.0, CCNA v7 Course #1 No Comments
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Contents
2.0. Introduction
2.0.1. Why should I take this module?
2.0.2. What will I learn to do in this module?
2.1. Cisco IOS Access
2.1.1. Operating Systems
2.1.2. GUI
2.1.3. Purpose of an OS
2.1.4. Access Methods
2.1.5. Terminal Emulation Programs
2.2. IOS Navigation
2.2.1. Primary Command Modes
2.2.2. Configuration Mode and Subconfiguration Modes
2.2.3. Video - IOS CLI Primary Command Modes
2.2.4. Navigate Between IOS Modes
2.2.5. Video - Navigate Between IOS Modes
2.2.6. A Note About Syntax Checker Activities
2.2.7. Syntax Checker - Navigate Between IOS Modes
2.3. The Command Structure
2.3.1. Basic IOS Command Structure
2.3.2. IOS Command Syntax Check
2.3.3. IOS Help Features
2.3.4. Video - Context Sensitive Help and Command Syntax Check
2.3.5. Hot Keys and Shortcuts
2.3.6. Video - Hot Keys and Shortcuts
2.3.7. Packet Tracer - Navigate the IOS
2.3.8. Lab - Navigate the IOS by Using Tera Term for Console Connectivity
2.4. Basic Device Configuration
2.4.1. Device Names
2.4.2. Password Guidelines
2.4.3. Configure Passwords
2.4.4. Encrypt Passwords
2.4.5. Banner Messages
2.4.6. Video - Secure Administrative Access to a Switch
2.4.7. Syntax Checker - Basic Device Configuration
2.5. Save Configurations
2.5.1. Configuration Files
2.5.2. Alter the Running Configuration
2.5.3. Video - Alter the Running Configuration
2.5.4. Capture Configuration to a Text File
2.5.5. Packet Tracer - Configure Initial Switch Settings
2.6. Ports and Addresses
2.6.1. IP Addresses
2.6.2. Interfaces and Ports
2.7. Configure IP Addressing
2.7.1. Manual IP Address Configuration for End Devices
2.7.2. Automatic IP Address Configuration for End Devices
2.7.3. Syntax Checker - Verify Windows PC IP Configuration
2.7.4. Switch Virtual Interface Configuration
2.7.5. Syntax Checker - Configure a Switch Virtual Interface
2.7.6. Packet Tracer - Implement Basic Connectivity
2.8. Verify Connectivity
2.8.1. Video Activity - Test the Interface Assignment
2.8.2. Video Activity - Test End-to-End Connectivity
2.9. Module Practice and Quiz

2.9.1. Packet Tracer - Basic Switch and End Device Configuration
2.9.2. Lab - Basic Switch and End Device Configuration
2.9.3. What did I learn in this module?
2.9.4 Module Quiz - Basic Switch and End Device Configuration
2.0. Introduction
2.0.1. Why should I take this module?
Welcome to Basic Switch and End Device Configuration!
As part of your career in networking, you might have to set up a new network or maintain and
upgrade an existing one. In either case, you'll configure switches and end devices so that
they are secure and perform effectively based on your requirements.
Out of the box, switches and end devices come with some general configuration. But for your
particular network, switches and end devices require your specific information and
instructions. In this module, you will learn how to access Cisco IOS network devices. You will
learn basic configuration commands and use them to configure and verify a Cisco IOS device
and an end device with an IP address.
Of course, there is much more to network administration, but none of that can happen without
first configuring switches and end devices. Let's get started!
2.0.2. What will I learn to do in this module?
Module Title: Basic Switch and End Device Configuration
Module Objective: Implement initial settings including passwords, IP addressing, and default
gateway parameters on a network switch and end devices.
Topic Title Topic Objective
Cisco IOS Access Explain how to access a Cisco IOS device for configuration
purposes.
IOS Navigation Explain how to navigate Cisco IOS to configure network
devices.
The Command Structure Describe the command structure of Cisco IOS software.
Basic Device
Configuration Configure a Cisco IOS device using CLI.
Save Configurations Use IOS commands to save the running configuration.
Ports and Addresses Explain how devices communicate across network media.
Configure IP Addressing Configure a host device with an IP address.

Verify Connectivity Verify connectivity between two end devices.
2.1. Cisco IOS Access
2.1.1. Operating Systems
All end devices and network devices require an operating system (OS). As shown in the
figure, the portion of the OS that interacts directly with computer hardware is known as the
kernel. The portion that interfaces with applications and the user is known as the shell. The
user can interact with the shell using a command-line interface (CLI) or a graphical user
interface (GUI).
• Shell - The user interface that allows users to request specific tasks from the
computer. These requests can be made either through the CLI or GUI interfaces.
• Kernel - Communicates between the hardware and software of a computer and
manages how hardware resources are used to meet software requirements.
• Hardware - The physical part of a computer including underlying electronics.
When using a CLI, the user interacts directly with the system in a text-based environment by
entering commands on the keyboard at a command prompt, as shown in the example. The
system executes the command, often providing textual output. The CLI requires very little
overhead to operate. However, it does require that the user have knowledge of the underlying
command structure that controls the system.
analyst@secOps ~]$ Is
Desktop Downloads lab.support.files second_drive
[analyst@secOps ~]$
2.1.2. GUI
A GUI such as Windows, macOS, Linux KDE, Apple iOS, or Android allows the user to
interact with the system using an environment of graphical icons, menus, and windows. The
GUI example in the figure is more user-friendly and requires less knowledge of the underlying

command structure that controls the system. For this reason, most users rely on GUI
environments.
However, GUIs may not always be able to provide all the features available with the CLI.
GUIs can also fail, crash, or simply not operate as specified. For these reasons, network
devices are typically accessed through a CLI. The CLI is less resource intensive and very
stable when compared to a GUL
The family of network operating systems used on many Cisco devices is called the Cisco
Internetwork Operating System (IOS). Cisco IOS is used on many Cisco routers and switches
regardless of the type or size of the device. Each device router or switch type uses a different
version of Cisco IOS. Other Cisco operating systems include IOS XE, IOS XR, and NX-OS.
Note: The operating system on home routers is usually called firmware. The most common
method for configuring a home router is by using a web browser-based GUL
2.1.3. Purpose of an OS
Network operating systems are similar to a PC operating system. Through a GUI, a PC
operating system enables a user to do the following:
• Use a mouse to make selections and run programs
• Enter text and text-based commands
• View output on a monitor
A CLI-based network operating system (e.g., the Cisco IOS on a switch or router) enables a
network technician to do the following:
• Use a keyboard to run CLI-based network programs
• Use a keyboard to enter text and text-based commands
• View output on a monitor
Cisco networking devices ran particular versions of the Cisco IOS. The IOS version is
dependent on the type of device being used and the required features. While all devices
come with a default IOS and feature set, it is possible to upgrade the IOS version or feature
set to obtain additional capabilities.
The figure displays a list of IOS software releases for a Cisco Catalyst 2960 Switch.

Cisco Software Download Example
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2.1.4. Access Methods
A switch will forward traffic by default and does not need to be explicitly configured to operate.
For example, two configured hosts connected to the same new switch would be able to
communicate.
Regardless of the default behavior of a new switch, all switches should be configured and
secured.
Method Description
Console
This is a physical management port that provides out-of-band access to a
Cisco device. Out-of-band access refers to access via a dedicated
management channel that is used for device maintenance purposes only.
The advantage of using a console port is that the device is accessible even
if no networking services are configured, such as performing the initial
configuration. A computer running terminal emulation software and a
special console cable to connect to the device are required for a console
connection.
Secure
Shell
(SSH)
SSH is an in-band and recommended method for remotely establishing a
secure CLI connection, through a virtual interface, over a network. Unlike a
console connection, SSH connections require active networking services on
the device, including an active interface configured with an address. Most
versions of Cisco IOS include an SSH server and an SSH client that can be
used to establish SSH sessions with other devices.

Telnet is an insecure, in-band method of remotely establishing a CLI
session, through a virtual interface, over a network. Unlike SSH, Telnet
Telnet does not provide a secure, encrypted connection and should only be used
in a lab environment. User authentication, passwords, and commands are
sent over the network in plaintext. The best practice is to use SSH instead
of Telnet. Cisco IOS includes both a Telnet server and Telnet client.
Note: Some devices, such as routers, may also support a legacy auxiliary port that was used
to establish a CLI session remotely over a telephone connection using a modem. Similar to a
console connection, the AUX port is out-of-band and does not require networking services to
be configured or available.
2.1.5. Terminal Emulation Programs
There are several terminal emulation programs you can use to connect to a networking
device either by a serial connection over a console port, or by an SSH/Telnet connection.
These programs allow you to enhance your productivity by adjusting window sizes, changing
font sizes, and changing color schemes.
Click each program name to see a screen capture of the interface.
PuTTY
PuTTY Configuration
Category
Session
logging
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Keyboard
Bell
features
- Window
Appearance
Behaviour
Translation
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Colours
Connection
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Proxy
Telnet
Rtogin
11 SSH
Senai
Basic options for your PuTTY session
Specify the destination you want to connect to
Host Name (or IP address) Port
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Load, save or delete a stored session
Sayed Sessions
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In the previous topic, you learned that all network devices require an OS and that they can be
configured using the CLI or a GUI. Using the CLI may provide the network administrator with
more precise control and flexibility than using the GUI. This topic discusses using CLI to
navigate the Cisco IOS.
As a security feature, the Cisco IOS software separates management access into the
following two command modes:
• User EXEC Mode - This mode has limited capabilities but is useful for basic
operations. It allows only a limited number of basic monitoring commands but does
not allow the execution of any commands that might change the configuration of
the device. The user EXEC mode is identified by the CLI prompt that ends with the
> symbol.
• Privileged EXEC Mode - To execute configuration commands, a network
administrator must access privileged EXEC mode. Higher configuration modes,
like global configuration mode, can only be reached from privileged EXEC mode.
The privileged EXEC mode can be identified by the prompt ending with the #
symbol.
The table summarizes the two modes and displays the default CLI prompts of a Cisco switch
and router.
Command
Mode
Description Default Device
Prompt
User Exec
Mode
Mode allows access to only a limited number of
basic monitoring commands.
It is often referred to as "view-only" mode.
Switch>
Router>
Privileged
EXEC Mode
Mode allows access to all commands and
features.
The user can use any monitoring commands and
execute configuration and management
commands.
Switch#
Router#
2.2.2. Configuration Mode and Subconfiguration Modes
To configure the device, the user must enter global configuration mode, which is commonly
called global config mode.
From global config mode, CLI configuration changes are made that affect the operation of the
device as a whole. Global configuration mode is identified by a prompt that ends with
(config)# after the device name, such as Switch(config)#.
Global configuration mode is accessed before other specific configuration modes. From
global config mode, the user can enter different subconfiguration modes. Each of these
modes allows the configuration of a particular part or function of the IOS device. Two common
subconfiguration modes include:
• Line Configuration Mode - Used to configure console, SSH, Telnet, or AUX
access.

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• Interface Configuration Mode - Used to configure a switch port or router network
interface.
When the CL1 is used, the mode is identified by the command-line prompt that is unique to
that mode. By default, every prompt begins with the device name. Following the name, the
remainder of the prompt indicates the mode. For example, the default prompt for line
configuration mode is Switch(config-line)# and the default prompt for interface configuration
mode is Switch(config-if)# .
2.2.3. Video - IOS CLI Primary Command Modes
2.2.4. Navigate Between IOS Modes
Various commands are used to move in and out of command prompts. To move from user
EXEC mode to privileged EXEC mode, use the enable command. Use the disable privileged
EXEC mode command to return to user EXEC mode.
Note: Privileged EXEC mode is sometimes called enable mode.
To move in and out of global configuration mode, use the configure terminal privileged
EXEC mode command. To return to the privileged EXEC mode, enter the exit global config
mode command.
There are many different subconfiguration modes. For example, to enter line subconfiguration
mode, you use the line command followed by the management line type and number you
wish to access. Use the exit command to exit a subconfiguration mode and return to global
configuration mode.
Switch(config)# line console 0
Switch(config-line)# exit
Switch(config)#
To move from any subconfiguration mode of the global configuration mode to the mode one
step above it in the hierarchy of modes, enter the exit command.
To move from any subconfiguration mode to the privileged EXEC mode, enter the end
command or enter the key combination Ctrl+Z.
Switch(config-line)# end
Switch#
You can also move directly from one subconfiguration mode to another. Notice how after
selecting an interface, the command prompt changes from (config-line)# to (config-if)#.
Switch(config-line)# interface FastEthemet 0/1
Switch(config-if)#
2.2.5. Video - Navigate Between IOS Modes
2.2.6. A Note About Syntax Checker Activities
When you are learning how to modify device configurations, you might want to start in a safe,
non-production environment before trying it on real equipment. NetAcad gives you different
simulation tools to help build your configuration and troubleshooting skills. Because these are

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simulation tools, they typically do not have all the functionality of real equipment. One such
tool is the Syntax Checker. In each Syntax Checker, you are given a set of instructions to
enter a specific set of commands. You cannot progress in Syntax Checker unless the exact
and full command is entered as specified. More advanced simulation tools, such as Packet
Tracer, let you enter abbreviated commands, much as you would do on real equipment.
2.2.7. Syntax Checker - Navigate Between IOS Modes
Use the Syntax Checker activity to navigate between IOS command lines on a switch.
Enter privileged EXEC mode using the enable command.
Switch>enable
Return to user EXEC mode using the disable command.
Switch#disable
Re-enter privileged EXEC mode.
Switch>enable
Enter global configuration mode using the configure terminal command.
Switch#configure terminal
Exit global configuration mode and return to privileged EXEC mode
using the exit command.
Switch(config)#exit
Re-enter global configuration mode.
Switch#configure terminal
Enter line subconfiguration mode for the console port using the line
console 0 command.
Switch(config)#line console 0
Return to global configuration mode using the exit command.
Switch(config-line)#exit
Enter VTY line subconfiguration mode using the line vty 0 15 command.
Switch(config)#line vty 0 15
Return to global configuration mode.
Switch(config-line)#exit
Enter the VLAN 1 interface subconfiguration mode using the interface
vlan 1 command.
Switch(config)#interface vlan 1
From interface configuration mode, switch to line console
subconfiguration mode using the line console 0 global configuration
command.

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