Backplane 10 gigabit connection between two AGX Orins using XFI/SFI

Hello. I want to connect two AGX Orins using the 10 GbE interface. On the dev kit carrier board, the XFI/SFI interface is connected to AQR113C PHY providing 10GBASE-T. Since I am not interested in connecting an RJ45 cable and another 10GBASE-T deice to this port, I am wondering if having the PHY IC is even necessary.
Question: Can the XFI/SFI interface of one Jetson be connected directly to the XFI/SFI of another without any PHY ICs?
If not, and I need to have two PHYs connected to each other on my board, then what type of PHY would be the best for this application?

That was not validated. So we don’t suggest to do that.

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