This should make it easier to set up and possibly provide a "work out of
the box" experience for most test usage. Typical wan&lan networking
setup is only two characters argument away.
Cc: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Acked-by: Hans Dedecker <dedeckeh@gmail.com>