Hello all! I've made some tests with my Rev C A20 OLinuxino Lime 2 board. So it uses the RTL8211C Phy.
source used: 2019.01+dfsg-7 The results are somewhat inconclusive i would say. The board seems to be able to transfer data with TX_DELAY values up to 3. Retry-counts went up when increasing the delay value. Also attached are tests with a reversed data-flow, as well as test with a longer cable. Default cable: 1m Long cable: 5m. What i did not test: if DHCP would work with TX_DELAY=?, as i used static ip addresses I did some testing with the RevK board i have at my other place, TX_DELAY = 3 was the needed value to get good ethernet speeds with that board. I can do some more testing if needed! Best regards, Dieter
iperf3-RevC-TXDelay.7z
Description: application/7z-compressed
