I tried this both on the latest Armbian and Radxa OS, the ethernet upload speed can only hit around 200Mb/s when the link is 2.5Gbps. Is there a known issue for this?
E.g. iperf3 test which shows a lot of high Retransmit values from the other side:
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 21.0 MBytes 176 Mbits/sec 406 11.3 KBytes
[ 5] 1.00-2.00 sec 22.6 MBytes 189 Mbits/sec 380 12.7 KBytes
[ 5] 2.00-3.00 sec 25.3 MBytes 212 Mbits/sec 462 15.6 KBytes
[ 5] 3.00-4.00 sec 24.1 MBytes 202 Mbits/sec 539 18.4 KBytes
[ 5] 4.00-5.00 sec 24.8 MBytes 208 Mbits/sec 510 12.7 KBytes
[ 5] 5.00-6.00 sec 23.0 MBytes 193 Mbits/sec 501 9.90 KBytes
[ 5] 6.00-7.00 sec 22.4 MBytes 188 Mbits/sec 635 11.3 KBytes
[ 5] 7.00-8.00 sec 20.8 MBytes 174 Mbits/sec 488 9.90 KBytes
[ 5] 8.00-9.00 sec 21.4 MBytes 180 Mbits/sec 451 12.7 KBytes
[ 5] 9.00-10.00 sec 23.2 MBytes 194 Mbits/sec 437 11.3 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 229 MBytes 192 Mbits/sec 4809 sender
[ 5] 0.00-10.01 sec 228 MBytes 191 Mbits/sec receiver
I see the download speed is fine and can hit around 2.35Gbps.
I see this is also mentioned in Jeff’s video