vepa mode: the respective direct child device can not communicate directly (by supporting a switch communications port aggregation), and may be external communication.
private mode: and vepa similar pattern, can not communicate, even though the switch port aggregation by supporting not between the respective sub-devices.
bridge mode: among the respective sub-devices may communicate, in FIG bridge does not exist, only for ease of understanding on Videos
source mode: only the specified address of the communication and mac
passthru mode: take over the parent device (port), the parent device can not receive the data packet, and each parent device allows only one device macvlan
