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Cisco 819 Integrated Services Routers Software Configuration Guide
OL-18906-02
Appendix A Cisco IOS Software Basic Skills
Understanding Command Modes
Ta b l e A-2 Command Modes Summary
Mode Access Method Prompt Mode Exit and Entrance About This Mode
User EXEC Begin a session with
your router.
Router>
To exit a router session, enter
the logout command.
Use this mode to:
• 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 to:
• Configure your router
operating parameters.
• Perform the verification steps
shown in this guide.
To prevent unauthorized changes
to your router configuration,
protect access to this mode by
using a password as described in
the
“Enable Secret Passwords and
Enable Passwords” procedure on
page A-5.
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 globally.
From this mode, you can access the
following modes:
• 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 by
using the interface
command.
Use this mode to configure
parameters for the router Ethernet
and serial interfaces or
subinterfaces.