5.3 Type-C Flash Connect Failure

Typical Symptoms

After selecting "Type-C Flash Connect" in the desktop client's Add Device option:

Open your system’s USB / network device list:

Determine the cause based on what you observe:

Observation	Cause
No USB NIC appears at all	Cable issue (90% of cases)—try a different cable
NIC appears but shows "Not Connected"	RNDIS not started on the board, or the image is not an official RDK image
NIC connected but SSH fails	PC-side IP not properly configured—it should be `192.168.128.100/24`

NIC Not Listed

Many Type-C cables support charging only, not data transfer. Replace with a full-featured USB 3.0, 5A data cable. Power off the board, re-plug the cable, and click Refresh in Studio.
Board Image

Type-C flash connect relies on the pre-configured static IP 192.168.128.10/24 in official RDK images. For third-party images, you must manually enable RNDIS:
```
sudo systemctl enable usb0-static --now
```
PC-side IP

The desktop client automatically requests admin privileges to configure the USB NIC with 192.168.128.100/24. Click "Yes" on the UAC prompt or enter your sudo password. If you missed the permission request, restart Studio and re-select "Type-C Flash Connect."
NIC Shows "Not Connected"

The board may still be booting. Wait 30 seconds and click the Refresh button.

Type-C flash connect uses the USB CDC RNDIS/NCM protocol to emulate an Ethernet connection. The full link is:

PC USB driver → USB cable (data mode) → Board-side USB device controller
  → RNDIS gadget → kernel netif (usb0) → sshd

Failure at any point breaks the connection. Suspect in this order of likelihood:

Keep a dedicated full-featured cable labeled "Debug Only"
Grant the desktop client permanent permission to modify network configurations
For teams using this extensively, ensure operations consistently deploy official RDK images