Ethernet over USB for STM32

[easternblack]

Hello.

I'm testing to make ethernet connect by using stm32 mcu's USB port like the picture below.

I have some STM32 EVBs support ethernet. (stm32f746g_disco, nucleo_stm32f746zg).
As you can see in the picture, I tested with ASIX AX88772B USB2.0 Fast Ethernet Adapter. On the Zephyr, I checked USB CDC ECM options for use it.

I'm using network shell which provided by Zephyr, but I never successed connecting ethernet network.

Here's two questions I wanna ask.

1. My Zephyr configs CONFIG_USB_DEVICE_NETWORK_ECM, and CONFIG_NETWORKING.
   Is this right way for use Ethernet over USB?
   Actually I'm using Zephyr 2.2.99, but also tested on 3.1.99.
2. Can you introduce other USB to ethernet module or soc which verified on Zephyr with STM32?