Getting Started 97Using the CLIThis section contains an introduction to the Command Line Interface (CLI).Command ModeThe CLI is divided into command modes. Each command mode has a specific commandset. Entering a question mark ? at the system prompt (console prompt) displays a list ofcommands available for that particular command mode.In each mode, a specific command is used to navigate from one command mode to another.The standards to access the modes are as follows:• User EXEC Mode• Privileged EXEC Mode• Global Configuration Mode• Interface Configuration ModeDuring the CLI session initialization, the CLI mode is the User EXEC Mode. Only alimited subset of commands are available in the User EXEC Mode. This level is reserved fortasks that do not change the device configuration and is used to access configuration sub-systems such as the CLI. To enter the next level, the Privileged EXEC Mode, a password isrequired.The Privileged EXEC Mode provides access to the device general configuration. For specificglobal configurations within the device, enter the next level, which is the GlobalConfiguration Mode. A password is not required.The Global Configuration Mode manages the device configuration on a global level. Forspecific configurations enter the next level, which is the Interface Configuration Mode. Apassword is not required.The Interface Configuration Mode configures the device at the physical interface level.Interface commands that require subcommands have another level, which is theSubinterface Configuration Mode. A password is not required.User EXEC ModeAfter the logging on to the device, the User EXEC command mode is enabled. The userEXEC commands connect to remote devices, change terminal settings on a temporarybasis, perform basic tests, and list system information.
