Cisco 2431 Software Configuration Guide - Page 17

Command Modes, Access Method, Router Prompt, Displayed, Exit Method - config

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Page 17 highlights

Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics Understanding Cisco IOS Software Basics Command Modes The Cisco IOS user interface involves different modes. Each command mode permits you to configure different components on your router. The commands available at any given time depend on which mode you are currently in. Entering a question mark (?) at the prompt displays a list of commands available for each command mode. Table 1-1 lists the most common command modes. Table 1-1 Common Command Modes Command Mode User EXEC Access Method Log in. Router Prompt Displayed Router> Privileged EXEC From user EXEC mode, Router# enter the enable command. Global configuration Interface configuration From the privileged EXEC mode, enter the configure terminal command. Router (config)# From the global configuration mode, enter the interface type number command, such as interface serial 0/0. Router (config-if)# Exit Method Use the logout command. To exit to user EXEC mode, use the disable, exit, or logout command. To exit to privileged EXEC mode, use the exit or end command, or press Ctrl-Z. To exit to global configuration mode, use the exit command. To exit directly to 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: Router# configure terminal Router(config)# interface serial 0/0 Router(config-if)# line 0 Router(config-line)# controller T1/E1 slot/port

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1-7
Cisco IAD2430 Series Integrated Access Devices Software Configuration Guide
OL-4306-03
Chapter 1
Understanding Interface Numbering and Cisco IOS Software Basics
Understanding Cisco IOS Software Basics
Command Modes
The Cisco IOS user interface involves different modes. Each command mode permits you to configure
different components on your router. The commands available at any given time depend on which mode
you are currently in. Entering a question mark (
?
) at the prompt displays a list of commands available
for each command mode.
Table 1-1
lists the most common command modes.
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(config-if)#
line 0
Router(config-line)#
controller
T1/E1 slot/port
<---See second Note below
Router(config-controller)#
exit
Router(config)#
exit
Router#
%SYS-5-CONFIG_I: Configured from console by console
The last message is normal and does not indicate an error. Press
Enter
to get the
Router#
prompt.
Table 1-1
Common Command Modes
Command Mode
Access Method
Router Prompt
Displayed
Exit Method
User EXEC
Log in.
Router>
Use the
logout
command.
Privileged EXEC
From user EXEC mode,
enter the
enable
command.
Router#
To exit to user EXEC
mode, use the
disable
,
exit
, or
logout
command.
Global configuration
From the privileged
EXEC mode, enter the
configure terminal
command.
Router (config)#
To exit to privileged
EXEC mode, use the
exit
or
end
command,
or press
Ctrl-Z
.
Interface configuration
From the global
configuration mode,
enter the
interface
type
number
command, such
as
interface
serial 0/0
.
Router (config-if)#
To exit to global
configuration mode, use
the
exit
command.
To exit directly to
privileged EXEC mode,
press
Ctrl-Z
.