Cisco Systems VG224 Undoing a Command or Feature, Router Prompt, Command Mode, Access Method

Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics

Understanding Cisco IOS Software Basics

Table 1-1 Common Command Modes

		Router Prompt
Command Mode	Access Method	Displayed	Exit Method
User EXEC	Log in.	Router>	Use the logout
			command.
Privileged EXEC	From user EXEC mode,	Router#	To exit to user EXEC
	enter the enable		mode, use the disable,
	command.		exit, or logout
			command.
Global configuration	From the privileged	Router (config)#	To exit to privileged
	EXEC mode, enter the		EXEC mode, use the
	configure terminal		exit or end command,
	command.		or press Ctrl-Z.
Interface configuration	From the global	Router (config-if)#	To exit to global
	configuration mode,		configuration mode, use
	enter the interface type		the exit command.
	number command, such		To exit directly to
	as interface serial 0/0.
			privileged EXEC mode,
			press Ctrl-Z.

Timesaver Each command mode restricts you to a subset of commands. If you are having trouble entering a command, check the prompt, and enter the question mark (?) for a list of available commands. You might be in the wrong command mode or using the wrong syntax.

In the following example, notice how the prompt changes after each command to indicate a new command mode:

Router> enable

Password: <enable password>

Router# configure terminal

Router(config)# interface serial 0/0

Router#

%SYS-5-CONFIG_I: Configured from console by console

The last message is normal and does not indicate an error. Press Return to get the Router# prompt.

Note You can press Ctrl-Zin any mode to immediately return to enable mode (Router#), instead of entering exit, which returns you to the previous mode.

Undoing a Command or Feature

If you want to undo a command you entered or disable a feature, enter the keyword no before most commands; for example, no ip routing.

Cisco VG224 Voice Gateway Software Configuration Guide

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