AIS AI2524 user manual Understanding the User Interface, Command Line Interface

Chapter 4: Understanding the User Interface

Chapter 4: Understanding the User Interface

Introduction

This chapter describes the features of the user interface.The AI2524 user interface provides access to several different command modes. Each command mode provides a group of related commands. This chapter describes how to access and list the commands available in each command mode and explains the primary uses for each command mode.

Command Line Interface

AI2524 commands can be entered at a terminal connected to the router using the command line interface (CLI). Commands may also be en- tered using the Web Browser interface. All routers using the Cisco IOS software have a home page. From this home page, you can access the Web Browser interface, which allows you to execute AI2524 com- mands. You can execute these commands by clicking on them or en- tering them in a command field. This feature is described in Web Browser Interface.

For security purposes, the Cisco IOS software provides two levels of access to commands: user and privileged. The unprivileged user mod is called user EXEC mode. The privileged mode is called privileged EXEC mode and requires a password. The commands available in user EXEC mode are a subset of the commands available in privileged EXEC mode.

If your router or access server does not find a valid system image, or if its configuration file is corrupted at startup, the system might enter read-only-memory (ROM) monitor mode. ROM monitor mode can also be accessed through privileged EXEC mode.

From privileged EXEC mode, you can access the global configuration mode and a number of specific configuration modes. These modes are listed in Command Modes.

Entering a question mark (?) at the system prompt allows you to obtain a list of commands available for each command mode.

Almost every configuration command also has a no form. In general, use the no form to disable a feature or function. Use the command without the keyword no to reenable a disabled feature or to enable a

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2524UM