Dell S4820T, Configuration Manual

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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 tengigabitethernet 4/17
Dell(conf-if-te-4/17)#ip address 192.168.10.1/24
Dell(conf-if-te-4/17)#show config
!
interface TenGigabitEthernet 4/17
ip address 192.168.10.1/24
no shutdown
Dell(conf-if-te-4/17)#no ip address
Dell(conf-if-te-4/17)#show config
!
interface TenGigabitEthernet 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#?
cd Change current directory
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
clock
Dell(conf)#cl
• Enter
[space]?
after a keyword lists all of the keywords that can follow the specified keyword.
Dell(conf)#clock ?
summer-time Configure summer (daylight savings) time
Configuration Fundamentals
45