Jetson AGX Orin+AQR113C Network Packet Loss

Robotics & Edge Computing Jetson Systems Jetson AGX Orin
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1

We are using the AQR113C chip as a 10G Ethernet PHY on the AGX ORIN platform. However, after testing, it has no packet loss issues at 1G speed, but the packet loss is quite serious at 10G speed. Our AQR113C fully replicates the reference design, only changing the network transformer and RJ45 connector. I haven’t found any issues, so we need your help to check.

AQR113C.pdf (333.9 KB)

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*** Please note that this reply is generated by LLM automatically ***

Based on the provided context, I’ll try to help you troubleshoot the packet loss issue with the AQR113C chip as a 10G Ethernet PHY on the AGX ORIN platform.

Firstly, let’s review the Ethernet controller configuration for the Jetson AGX Orin series. According to the context, the Jetson AGX Orin series can support up to one MGBE(XFI) and one RGMII at the same time. However, not all of these ports can be used because of UPHY lane sharing among PCIE, MGBE, and XUSB.

Since you’re using the AQR113C chip as a 10G Ethernet PHY, I assume you’re using the MGBE(XFI) port. To verify the proper connectivity, you can check the lanes as mentioned in the PCIe (Optional) section of the context. Although this section is specific to PCIe, the concept of verifying lane connectivity applies to other interfaces as well.

To troubleshoot the packet loss issue, you can try the following:

  1. Verify signal quality: As mentioned in the UART section of the context, verify that signal quality is acceptable. Look for excessive over/undershoot and glitches on signal edges. This might be a good starting point to identify any issues with the signal integrity.
  2. Check the network transformer and RJ45 connector: Since you’ve changed the network transformer and RJ45 connector, double-check that they are compatible with the AQR113C chip and the AGX ORIN platform.
  3. Compare with the reference design: Although you’ve mentioned that your design fully replicates the reference design, double-check that there are no subtle differences that might be causing the issue.
  4. Test at different speeds: You’ve mentioned that the packet loss is quite serious at 10G speed, but there are no issues at 1G speed. Try testing at other speeds (e.g., 2.5G, 5G) to see if the issue is specific to 10G or if it’s a more general problem.
  5. Check the AGX ORIN platform configuration: Ensure that the AGX ORIN platform is configured correctly for 10G Ethernet. You can refer to the Jetson AGX Orin series documentation for more information on configuring the platform.

In comparison to other Jetson platforms, the context doesn’t provide specific information on the Ethernet controller configuration for the Jetson Xavier NX series or the Jetson AGX Xavier series. However, the PCIe (Optional) section mentions that verifying proper connectivity by checking lanes is not applicable to the Jetson AGX Orin series, but it is applicable to the Jetson Xavier NX series and the Jetson AGX Xavier series. This might indicate that the Jetson AGX Orin series has different requirements or constraints for Ethernet connectivity.

I hope this helps you troubleshoot the packet loss issue with the AQR113C chip on the AGX ORIN platform. If you have any further questions or need more specific guidance, feel free to ask.

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4

Sorry, I am not quite sure what is the scenario in your pictures. Could you elaborate?

5

Thank you very much for your help. This problem has been resolved, and the reason was that the differential frequency of the common-mode inductor we chose was too low.