Cisco 1801, Configuration Manual

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A-3
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Appendix A Cisco IOS Software Basic Skills
Understanding Command Modes
Table A-2 Command Modes Summary
Mode Access Method Prompt Exit and Entrance Method About This Mode
User EXEC Begin a session with
your router.
Router>
To exit a router session, enter
the
logout command.
Use this mode for these tasks:
•
Change terminal settings.
•
Perform basic tests.
•
Display system information.
Privileged
EXEC Enter the enable
command from user
EXEC mode.
Router# •
To exit to user EXEC
mode, enter the
disable
command.
• To enter global
configuration mode,
enter the
configure
command.
Use this mode for these tasks:
• Configure your router
operating parameters.
•
Perform the verification steps
shown in this guide.
To prevent unauthorized changes
to your router configuration,
access to this mode should be
protected with a password as
described in
“Enable Secret
Passwords and Enable Passwords”
later in this chapter.
Global
configuration Enter the configure
command from
privileged EXEC
mode.
Router
(config)#
•
To exit to privileged
EXEC mode, enter the
exit or end command, or
press Ctrl-Z .
• To enter interface
configuration mode,
enter the
interface
command.
Use this mode to configure
parameters that apply to your
router as a whole.
Also, you can access the following
modes, which are described later in
this table:
•
Interface configuration
• Router configuration
•
Line configuration
Interface
configuration Enter the interface
command (with a
specific interface, such
as
interface atm 0 )
from global
configuration mode.
Router
(config-if)#
•
To exit to global
configuration mode,
enter the
exit command.
• To exit to privileged
EXEC mode, enter the
end command, or press
Ctrl-Z .
•
To enter subinterface
configuration mode,
specify a subinterface
with the
interface
command.
Use this mode to configure
parameters for the router Ethernet
and serial interfaces or
subinterfaces.