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The no Command
When you enter a command, the command line is added to the running conguration le. Disable a command and remove it from the
running-cong by entering the original command preceded by the
no command.
For example, to delete an ip address congured on an interface, use the no ip address ip-address command, as shown in bold in
the following example.
NOTE: To help you construct the “no” form of a command, use the help or ? command as described in Obtaining Help.
Undoing a Command with the no Command
Dell(conf)#interface tengigabitethernet 5/1
Dell(conf-if-te-5/1)#ip address 192.168.10.1/24
Dell(conf-if-te-5/1)#show config
!
interface TenGigabitEthernet 5/1
!
ip address 192.168.10.1/24
shutdown
Dell(conf-if-te-5/1)#
no ip address
Dell(conf-if-te-5/1)#show config
!
interface TenGigabitEthernet 5/1
no ip address
shutdown
Dell(conf-if-te-5/1)#
Layer 2 protocols are disabled by default. Enable them using 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.
• Enter ? after a partial keyword lists all of the keywords that begin with the specied letters.
• Enter [space]? after a keyword lists all of the keywords that can follow the specied keyword.
? Command Example
Dell#?
start Start Shell
capture Capture Packet
cd Change current directory
clear Reset functions
clock Manage the system clock
configure Configuring from terminal
copy Copy from one file to another
--More--
Keyword? Command Example
? after a partial keyword lists all of the keywords that begin with the specied letters.
Dell(conf)#cl?
class-map
clock
Dell(conf)#cl
Conguration
Fundamentals 43