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Table of Contents

Configuration Fundamentals Overview

Configuration Fundamentals Overview

This chapter provides an overview of Cisco IOS software configuration, describes the chapters in this document, and suggests sections to read based on various situations. This chapter contains the following sections:

Overview of Router Configuration Tasks

To configure your router or access server, you must perform several tasks. Initially, you must determine the following:

Then, refer to the Cisco Product Catalog and the release notes for a list of Cisco-supported protocols, interfaces, and platforms. Set up the hardware as described in the documentation shipped with your product. Configure any user interface, file management, or interface management tasks as described in this book. Configure protocol-specific features on your router or access server as described in the appropriate chapters of the other Cisco IOS software configuration guides.

Cisco  IOS User Interfaces

The user interface chapters describe the different methods of entering commands into the router and altering the user environment.

The Cisco IOS software provides a command line interface that allows you to configure and manage the router or access server. If you are unfamiliar with the Cisco  IOS command line interface, you should read the "Using the Command Line Interface" chapter. This chapter discusses the different command modes, context-sensitive help, and editing features. This chapter also describes the Web browser interface, which can be used to configure and monitor the router as well.

Cisco provides some configuration alternatives to the command line interface. If you wish to use AutoInstall to configure a new router to change the configuration, read the "Using Configuration Tools" chapter. This chapter also mentions other configuration tools that are available, but it does not provide detailed documentation.

To use the command line interface, your terminal must be connected to the router through the console port or one of the TTY lines. By default, the terminal is configured to a basic configuration, which should work for most terminal sessions. However, you may want to alter the terminal settings. Refer to the "Configuring Operating Characteristics for Terminals" chapter for information.

You can also make connections to other hosts from the router. The "Managing Connections, Menus, and System Banners" chapter describes how to manage these connections. Alternately, users can connect to your router. You can display messages to the terminals of these users. These tasks are also described in the "Managing Connections and System Banners" chapter.

File Management

The file management chapters describe the different types of files you can manipulate on the router, such as configuration files, images, and microcode.

The "Modifying, Downloading, and Maintaining Configuration Files" chapter discusses how to modify configuration files, download configuration files for servers, store configuration files on servers, and configure the router to load a configuration file at system startup. In order to customize your router's operation to your needs, you will need to alter the configuration file. This chapter describes how to do this task, while the other chapters in the Cisco IOS documentation set describe the specific commands that are added to the configuration.

The "Loading and Maintaining System Images and Microcode" chapter discusses how to download images from servers, store images on servers, specify which image is loaded at system startup, and specify which microcode images to use. If you are not storing or upgrading your system image and you do not wish to change image booting procedures, you do not need to read this chapter.

The "Maintaining Router Memory" chapter deals with the different types of memory your router may have and how to use this memory to manage files. This chapter also contains information on how to upgrade images on some platforms. Read this chapter if you are upgrading your system image or deleting files in Flash memory.

The "Rebooting a Router" chapter focuses on tasks related to the rebooting procedure. Read this chapter if you wish to change which image or configuration file is loaded at system startup. This chapter also discusses ROM Monitor mode, which allows you to boot the router manually.

The "Configuring Additional File Transfer Functions" chapter describes how to configure your router to be a server or use rsh and rcp. As a TFTP server, your router can provide other routers with images and configuration files over the network. The remote shell and remote copy functions allow users to remotely execute commands or copy files to or from another host.

System Management

The system management chapters discuss tasks that allow you to maintain your router after it is configured with the network, routing, and WAN protocols. These chapters discuss ways you can fine-tune the router and maintain it over time.

SNMP, RMON, Cisco Discovery Protocol, and Response Time Reporter are described in the "Monitoring the Router and Network" chapter. You can use these protocols to gather information about the router and network usage.

The "Troubleshooting the Router" chapter provides an introduction to troubleshooting techniques, error message logging, and debugging commands. If you are troubleshooting a particular protocol, read this chapter to learn how to log system error messages and use debugging commands. Then, refer to the chapter in the documentation set that documents your protocol. The Internetwork Troubleshooting Guide also provides troubleshooting information.

The "Performing Basic System Management" chapter discusses basic optional tasks. For example, you can change the name of the router, create command aliases, enable minor services, and set time and calendar services.

The "Configuring the System Controller and Managed Shelves" chapter describes the system controller, a Cisco IOS-based device that aids in the monitoring and management of a number of access servers and routers. Access servers and routers managed by the system controller are called shelves.

Guide to This Book

The previous sections listed common tasks found in each chapter. However, some common tasks require information in more than one chapter. This section suggests sections in different chapters of the Configuration Fundamentals Configuration Guide that are useful to read based on your situation.

Learning the Cisco IOS Command Line Interface

If you are not familiar with the Cisco IOS command line interface, read the following sections to gain a basic understanding of the user interface and basic configuration tasks:

In the "Using the Command Line Interface" chapter:

In the "Modifying, Downloading, and Maintaining Configuration Files" chapter:

In the "Performing Basic System Management" chapter:

Storing or Obtaining Configuration Files or Images from a Server

You might want to save a configuration or image on a server or upgrade your image to a different release. If you will be storing or obtaining configuration files or images from a server, read the following sections:

In the "Modifying, Downloading, and Maintaining Configuration Files" chapter:

In the "Maintain Router Memory" chapter:

Changing the Image or Configuration File Loaded by the Router

If you wish to change the image or configuration file used when the system reloads, read the following sections:

In the "Modifying, Downloading, and Maintaining Configuration Files" chapter:

In the "Loading and Maintaining System Images and Microcode" chapter:

In the "Rebooting a Router" chapter:

Other Documentation

Other documentation for Cisco routers and access servers is available.

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