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DRA821U: Is it possible to communicate between two of DRA821s with SGMII I/F without using PHY + MDIO ?

Part Number: DRA821U

Hi,

My customer is considering to use the two of DRA821s. Is it possible to communicate between two of DRA821s with SGMII I/F without using PHY + MDIO ?

I think it's basically possible, but is it not recommended ? or it takes time to fix the driver or any other software ? Could you please provide them your opinion.

Regards,

Hideaki