Reference Guide

Configuration Fundamentals | 39
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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
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.