JetPack4.3 PCIE virtual ethernet performance issue

PCIe bus error is likely due to cable that you are using.

You will need E3317 like TX/RX swap board.

Please refer to below document for detail specification about E3317 board:

Jetson_AGX_Xavier_PCIe_Endpoint_Design_Guidelines.pdf (1.9 MB)

Also go through this thread:

Thanks,
Om