Reference Guide

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Undoing Commands
When you enter a command, the command line is added to the running configuration file (running-
config).
To disable a command and remove it from the running-config, enter the no command, then the original
command. For example, to delete an IP address configured on an interface, use the no ip address
ip-address command.
NOTE: Use the help or ? command as described in Obtaining Help.
Example of Viewing Disabled Commands
Dell(conf)#interface gigabitethernet 4/17
Dell(conf-if-gi-4/17)#ip address 192.168.10.1/24
Dell(conf-if-gi-4/17)#show config
!
interface GigabitEthernet 4/17
ip address 192.168.10.1/24
no shutdown
Dell(conf-if-gi-4/17)#no ip address
Dell(conf-if-gi-4/17)#show config
!
interface GigabitEthernet 4/17
no ip address
no shutdown
Layer 2 protocols are disabled by default. To enable Layer 2 protocols, use the no disable command.
For example, in PROTOCOL SPANNING TREE mode, enter no disable to enable Spanning Tree.
Obtaining Help
Obtain a list of keywords and a brief functional description of those keywords at any CLI mode using
the ? or help command:
• To list the keywords available in the current mode, enter ? at the prompt or after a keyword.
• Enter ? after a prompt lists all of the available keywords. The output of this command is the same for
the help command.
Dell#?
calendar Manage the hardware calendar
cd Change current directory
change Change subcommands
clear Reset functions
clock Manage the system clock
configure Configuring from terminal
copy Copy from one file to another
debug Debug functions
--More--
• Enter ? after a partial keyword lists all of the keywords that begin with the specified letters.
Dell(conf)#cl?
class-map
Configuration Fundamentals
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