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Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide
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Chapter3 Cisco IOS Software Basics
Undoing a Command or Feature
Note You can press Ctrl-z in any mode to immediately return to enable mode (Router#), instead of
entering exit, which returns you to the previous mode.
Undoing a Command or Feature
If you want to undo a command you entered or disa ble a feature, enter the keyword no before most
commands; for example, no ip routing.
Saving Configuration Changes
You need to enter the copy running-config startup-config command to save your configuration
changes to nonvolatile random-access memory (NVRAM), so 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 following appears:
[OK]
Router#
Where to Go Next
Now that you have learned some Cisco IOS software basics, you c an 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 com mand,
check the prompt and then enter the ques tion mark (?) for a list of available commands. You might
be in the wrong command mode or using the wrong syntax.
•To disable a feature, enter the keyword no before the command; for example, no ip routing.
•You need to save your configuration changes to NVRAM so the changes are not lost if there is a
system reload or power outage.
Proceed to Chapter 4, “Configuring with the Command-Line Interface” to begin configuring the router.