Command Configuration Modes
User EXEC Mode
User EXEC mode is the default mode for the device; it supports the lowest level of
user permissions. In this mode, you can execute basic commands such as
ping and
traceroute, but only a subset of clear, show, and debug commands can be entered in this mode.
The following example shows the User EXEC prompt after login. The
enable command enters privileged EXEC mode.
device> enable device#
Privileged EXEC Mode
Privileged EXEC mode supports all clear, show, and debug commands. In addition, you
can enter some configuration commands that do not make changes to the system configuration.
The following example shows the privileged EXEC prompt. At this prompt, you issue
the
configure terminal command to enter global configuration mode.
device# configure terminal device(config)#
Global Configuration Mode
Global configuration mode supports commands that can change the device configuration.
For any changes to be persistent, you must save the system configuration before rebooting
the device. The global configuration mode provides access to sub-configuration modes
for individual interfaces, VLANs, routing protocols, and other configuration areas.
The following example shows how you access the interface sub-configuration mode by
issuing the
interface command with a specified interface.
device(config)# interface ethernet 1/1/1 device(config-if-e1000-1/1/1)#