Am Dienstag, den 06.04.2021, 18:01 +0000 schrieb Grant Grundler: > > Ethernet does not support > > different rates in each direction. So if RX and TX are different, i > > would actually say something is broken. > > Agreed. The question is: Is there data or some heuristics we can use > to determine if the physical layer/link is ethernet? > I'm pessimistic we will be able to since this is at odds with the > intent of the CDC spec.
Yes, CDC intends to hide that. We can conclude that an asymmetric link rules out ethernet, but anything else is difficult. Regards Oliver