Undoing a Command or Feature
If you want to undo a command you entered or disable a feature, enter the keyword
no
before most commands.
For example,
no ip routing
.
Saving Configuration Changes
Enter the
copy running-config startup-config
command to save your configuration changes to nonvolatile
random-access memory (NVRAM). Doing so ensures that the changes are not lost if there is a system reload
or power outage. For example:
Router#
copy running-config startup-config
Building configuration...
It might take a minute or two to save the configuration to NVRAM. After the configuration has been saved,
the screen displays the following:
[OK]
Router#
Upgrading to a New Cisco IOS Release
To install or upgrade to a new Cisco IOS release, see
How to Update or Upgrade Cisco IOS Software
.
Where to Go Next
Now that you have learned some Cisco IOS software basics, you can begin to configure the router using the
CLI.
Remember that:
• You can use the question mark (?) and arrow keys to help you enter commands.
• Each command mode restricts you to a set of commands. If you have difficulty entering a command,
check the prompt and then enter the question mark (
?
) for a list of available commands. You might be
in the wrong command mode or be using the wrong syntax.
• To disable a feature, enter the keyword
no
before the command. For example,
no ip routing
.
• Save your configuration changes to NVRAM so the changes are not lost if there is a system reload or
power outage.
Proceed to
Configuring the Host Name and Password, on page 5
to begin configuring the router.
Cisco VG400 Voice Gateway Software Configuration Guide
3
Understanding Interface Numbering and Cisco IOS Software Basics
Undoing a Command or Feature