Using Cisco Ios Software - Cisco Catalyst 2000 Configuration Handbook

2 Cisco LAN Switching Configuration Handbook
The output from a command can be searched and filtered so that useful information
■
can be found quickly.
■ Parameters for the CLI connection to the switch can be set to preferred values.

Using Cisco IOS Software

Cisco IOS Software has two basic user modes for switch administration and a number of
other modes that enable you to control the configuration of the switch. In addition to a
variety of modes, Cisco IOS Software provides features such as help and command-line
editing that enable you to interact with the switch for management purposes. The follow-
ing items describe how to access these modes and use options to configure the switch.
User interface modes.
1.
a. User EXEC mode.
b. Privileged EXEC mode.
c. Configuration mode.
Switch>
Users can connect to a switch through the console port or Telnet session. By
default, the initial access to a switch places the user in user EXEC mode and
offers a limited set of commands. When connecting to the switch, a user-level
password might be required.
Switch> enable
password: [password]
Switch#
When a user gains access in user EXEC mode, the enable command can be used
to enter privileged EXEC or enable mode. Full access to all commands is avail-
able. To leave privileged EXEC mode, use the disable or exit commands.
Switch# configure terminal
From privileged EXEC mode, the configuration mode can be entered. Switch
commands can be given to configure any switch feature that is available in the
IOS software image. When you are in configuration mode, you manage the
active memory of the switch. Anytime you enter a valid command in any config-
uration mode and press Enter, the memory is immediately changed.
Configuration mode is organized in a hierarchical fashion. Global configuration
mode enables commands that affect the switch as a whole. Interface configura-
tion mode enables commands that configure switch interfaces. You can move in
and out of many other configuration modes depending on what is configured. To
move from a lower-level configuration mode to a higher level, type exit. To leave
the global configuration mode and return to the privileged EXEC mode, type
exit at the global configuration prompt. To leave any configuration mode and
return to privileged EXEC mode, type end or Ctrl-Z.