© 2003, Cisco Systems, Inc. All rights reserved.

© 2003, Cisco Systems, Inc. All rights reserved. 2

Module 8: Operating a Configuring Cisco IOS Devices

Operating Cisco IOS Software

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Objectives

• Use the available configuration tools to establish connectivity to the appropriate network device in order to complete the initial device configuration

• Verify the default configuration of each device, given a functioning access layer switch and router

• Set up console connections between Cisco network devices and a terminal, given a need to configure and monitor network equipment

• Describe the features of the Cisco IOS user interface

• Identify the differences between the user EXEC and privileged EXEC modes

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Cisco IOS software delivers network services and enables networked applications.

Cisco IOS Software Features

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Configuring Network Devices

• Configuration sets up the device with the following:

– Network policy of the functions required

– Protocol addressing and parameter settings

– Options for administration and management

• Catalyst switch memory has initial configuration with default settings

• Cisco router will prompt for initial configuration if there is no configuration in memory

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An Overview of Cisco Device Startup

1. Find and check device hardware.

2. Find and load Cisco IOS software image.

3. Find and apply device configurations.

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• Configurations can come from many sources.

• Configurations will act in device memory.

External Configuration Sources

Console Port

Auxilliary Port

Interfaces Virtual Terminal

PC or UNIX Server

Web or NetworkManagement

Server

Telnet

TFTP

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• A CLI is used to enter commands.

• Operations vary on different internetworking devices.

• Users type or paste entries in the console command modes.

• Enter key instructs device to parse and execute the command.

• Two primary EXEC modes are user mode and privileged mode.

• Command modes have distinctive prompts.

Cisco IOS User Interface Functions

CiscoIOS

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There are two main EXEC modes for entering commands.

Cisco IOS Software EXEC Mode

First Mode:

User Mode

• Limited examination of switch or router

• Command prompt: hostname>

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Cisco IOS Software EXEC Mode (Cont.)

Privileged (or Enabled) Mode

• Detailed examination of switch and router

• Enables configuration and debugging

• Prerequisite for other configuration modes

• Command prompt: hostname#

Second Mode (and Most Commonly Used):

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Summary

• The Cisco IOS software platform is implemented on all Cisco hardware platforms.

• You will use Cisco IOS software to communicate the configuration details that implement the learning objectives of this course.

• You can configure a switch or router from sources that are external to the device.

• Cisco IOS software uses a CLI as its traditional console environment. While Cisco IOS software is a core technology, Cisco IOS software operation details vary on different internetworking devices.

• The Cisco IOS software supports two EXEC command modes: user and privileged.