RNDIS over USB STM32F746-Discovery ping time out problem

[pferd]

Hello,

I have problem with ping request and RNDIS server. I use STM32F746G-Discovery and Windows 7,10,11.

My steps:

1. I compiled the example STM32Cube_FW_F7_V1.17.1\Projects\STM32746G- Discovery\Applications\USB_Device\CDC_RNDIS_Server for FS and uploaded stm32 board.
2. I set network in Windows for Remote NDIS:

  - Deactivate IPv6 and activate IPv4 mode

  - Static addresses as follows:

                - Address = 192.168.0.11

                - Network Mask = 255.255.255.0

                - Gateway = 192.168.0.1

  - Automatic DNS and Routing deactivated.

1. I opened command line and created ping request „ping 192.168.0.10 –t”. It works ok.

1. I reconnected usb in PC. Ping doesn’t work. I still have „Request timed out”:

To restore communication I need to change the network settings. I have to set IP6 active and click OK.

Why is communication restored after IP6 activation? I think than communication should start after connect USB to PC. Can you explain to me what is the problem ?

[FBL]

Hello @pferd 

You are trying to run STM32746G-DISCOVERY_USBD-FS example from cube firmware without any modifications using our reference board MB1191-C03? You followed readme with no success?
If not, please don't hesitate to share your hardware setup and the minimum software to reproduce the issue.

[pferd]

Hello,

I used the example without any modifications:

...\STM32Cube_FW_F7_V1.17.1\Projects\STM32746G-Discovery\Applications\USB_Device\CDC_RNDIS_Server

I read "readme.txt" file.

I used your reference board MB1191 B-04 2155003701.

[FBL]

Hi @pferd 

After several tests, I couldn't reproduce. It appears that deactivating and then reactivating IPV6 allows the target and the host to restore communication without any issues.

[pferd · Accepted solution]

Hi,

I believe the problem was the antivirus program. When I tested the device without an antivirus program it worked fine. Using Wireshark I could see that not all network packets were arriving.

I gave up using RNDIS over USB.