Reference Guide

36 | Configuration Fundamentals
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Undoing Commands
When you enter a command, the command line is added to the running configuration file. Disable a
command and remove it from the running-config by entering the original command preceded by the
command
no. For example, to delete an ip address configured on an interface, use the no ip address
ip-address
command, as shown in the following example.
FTOS(conf)#interface gigabitethernet 4/17
FTOS(conf-if-gi-4/17)#ip address 192.168.10.1/24
FTOS(conf-if-gi-4/17)#show config
!
interface GigabitEthernet 4/17
ip address 192.168.10.1/24
no shutdown
FTOS(conf-if-gi-4/17)#no ip address
FTOS(conf-if-gi-4/17)#show config
!
interface GigabitEthernet 4/17
no ip address
no shutdown
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:
• Enter
? at the prompt or after a keyword to list the keywords available in the current mode.
•
? after a prompt lists all of the available keywords. The output of this command is the same for the
help command.
FTOS#?
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
Note: Use the help or ? command as discussed in Obtaining Help in the Configuration Fundamentals
chapter command to help you construct the “no” form of a command.