Administrator Guide

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

DellEMC(conf)#interface tengigabitethernet 4/17

DellEMC(conf-if-gi-4/17)#ip address 192.168.10.1/24

DellEMC(conf-if-gi-4/17)#show config

interface GigabitEthernet 4/17

ip address 192.168.10.1/24

no shutdown

DellEMC(conf-if-gi-4/17)#no ip address

DellEMC(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 command prompt to list all of the available keywords. The output of this command is the same as the help command.

DellEMC#?

bmp BMP commands

cd Change current directory

clear Reset functions

clock Manage the system clock

• Enter ? after a partial keyword lists all of the keywords that begin with the specified letters.

DellEMC(conf)#cl?

class-map

clock

DellEMC(conf)#cl

• Enter [space]? after a keyword lists all of the keywords that can follow the specified keyword.

DellEMC(conf)#clock ?

summer-time Configure summer (daylight savings) time

timezone Configure time zone

DellEMC(conf)#clock

Entering and Editing Commands

Notes for entering commands.

• The CLI is not case-sensitive.

• You can enter partial CLI keywords.

• Enter the minimum number of letters to uniquely identify a command. For example, you cannot enter cl as a partial keyword

because both the clock and class-map commands begin with the letters “cl.” You can enter clo, however, as a partial

keyword because only one command begins with those three letters.

• The TAB key auto-completes keywords in commands. Enter the minimum number of letters to uniquely identify a command.

Configuration Fundamentals