Roon RAAT and "An audio file is loading slowly"

[ogs]

I think it is quite clear by now that the Devialet ethernet port does not work properly on gigabit when using RAAT (TCP) but works on AIR (UDP). Both RAAT and AIR works when the Devialet port is at 100 Mbps speed (as is the case in my setup). @mdconnelly  has done a fine job with his tests. There may exist switches that will work at gigabit with the Devialet input, but something is clearly not right as this should work with all. It is of course strange that nobody has reported errors streaming high-res on gigabit using UPnP which I guess is TCP. Does anyone know if UPnP is TCP?