# uname -sr
FreeBSD 11.1-STABLE
# usbconfig
ugen6.2: <Realtek USB 101001000 LAN> at usbus6, cfg=1 md=HOST spd=HIGH (480Mbps) pwr=ON (200mA)
# usbconfig dump_device_desc
...
ugen6.2: <Realtek USB 101001000 LAN> at usbus6, cfg=1 md=HOST spd=HIGH (480Mbps) pwr=ON (200mA)
bLength = 0x0012
bDescriptorType = 0x0001
bcdUSB = 0x0210
bDeviceClass = 0x0000 <Probed by interface class>
bDeviceSubClass = 0x0000
bDeviceProtocol = 0x0000
bMaxPacketSize0 = 0x0040
idVendor = 0x0bda
idProduct = 0x8153
bcdDevice = 0x3000
iManufacturer = 0x0001 <Realtek>
iProduct = 0x0002 <USB 10/100/1000 LAN>
iSerialNumber = 0x0006 <000001>
bNumConfigurations = 0x0002
...
# kldload if_cdce
# ifconfig ue0
ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
...
#freebsd, #if_cdce