Cross-compiling the samples onto the DRIVE platform

Every HSD connector (in Table 3-11. Dual GbE Dongle Ethernet Connection Mapping) with RJ45 channel A/B connection works on my side. Have you plugged a power plug into your Dual GbE dongle? Please also refer to https://developer.nvidia.com/DRIVE/secure/docs/DRIVE_AGX_Developer_Kit_Hardware_Quick_Start_Guide.pdf.

Has internet ever worked on this system before? Could you check if something wrong outside of the system and dongle? Ethernet cable? DHCP server?

Please also check if below topics can help on your case.