Thanks for your information, it doesn't work for me, I tried everything as explained on the ARC Wiki site, but it doesn't work.
I tested on 2 platforms Intel and AMD, the same network card r8168 cannot work with DS3622xs+ but it can work with DS923+ like yours, it does not work from the moment the DSM kernel is started, the same problem and I don't understand anything.
Avec RR and ARPL M-shell I have no problems.