| group | string |  | The group ID which will own the device. If set to NULL everyone will be able to use the device. | 
| mode | uint32 | 1 | The operating mode of the virtual device. Allowed values are 1 (tun) to create a layer 3 device and 2 (tap) to create an Ethernet-like layer 2 one. | 
| multi-queue | boolean | FALSE | If the property is set to TRUE, the interface will support multiple file descriptors (queues) to parallelize packet sending or receiving. Otherwise, the interface will only support a single queue. | 
| owner | string |  | The user ID which will own the device. If set to NULL everyone will be able to use the device. | 
| pi | boolean | FALSE | If TRUE the interface will prepend a 4 byte header describing the physical interface to the packets. | 
| vnet-hdr | boolean | FALSE | If TRUE the IFF_VNET_HDR the tunnel packets will include a virtio network header. |