Discarding configuration changes
How to discard configuration changes and exit configuration mode.
You cannot exit from configuration mode with uncommitted configuration changes; you must either commit the changes or discard them. If you do not want to commit the changes, you can discard them by using the exit discard command.
vyatta@R1# exit Cannot exit: configuration modified. Use 'exit discard' to discard the changes and exit. vyatta@R1# exit discard vyatta@R1:~$