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Thank you @lex, but that I have already tried, and not a matter of load the appropriate driver. The driver gmac0 message is " No PHY found!" . This may mean that the RTL8211 chip has not been found becaruse is broken. 
I measured with a Fluke the ethernet connector and is dead. 
As I said earlier, I tested all distributions there, I have compiled several kernel, and even activate the internal PHY SoC, but no way. I know what I do because I 'm Linux administrator and I have compiled many kernel in my life. 
It seems I'm the only one with this problem, so I think my OrangePi Plus 2 is defective. |   
 
 
 
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