Cisco 2600 Series Configuration - Page 4

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Cisco 2600 Series Configuration

1 Cisco Inter-network Operating System (IOS)

1.1 Cisco IOS Operation Modes

The Cisco Software provides access to four different command modes. There are more
commands, but in normal use they are not necessary. Each command mode provides a
different group of related commands. For security purposes, the Cisco IOS software
provides two levels of access to commands: user and privileged. The unprivileged user
mode is called user EXEC mode. The privileged mode is called privileged EXEC mode
and requires a password.
The following table, Table (1) describes four used modes, how to enter the modes and
the resulting prompts. The prompt helps you identify which mode you are in and
therefore which commands are available to you. In Fig. (1) these four operation modes
are presented as a figure.
Table 1. Accessing and Exiting Command Modes.
Command Mode
User EXEC
Log in.
Privileged EXEC
From user EXEC
mode, use the enable
EXEC Command
Global configuration
From privileged
EXEC mode, use the
configure terminal
privileged EXEC
command.
Interface configuration
From global
configuration mode,
specify an interface
using an interface (or
router) command
Access Method
Router>
Router#
Router(config)#
Router(config-if)#
Or
Router(config-
router)#
4
Prompt
Exit Method
Use the logout
command.
To return to user EXEC
mode, use the disable
command
To return to privileged
EXEC mode from
global configuration
mode, use the exit or
end command, or press
Ctrl-Z.
To return to global
configuration mode use
the exit command. To
return to privileged
EXEC mode, use the
end command, or press
Ctrl-Z.