Yes I tried different cables.
Any chance to get an advanced replacement?
The new unit just arrived a few minutes ago
osmc@osmc:~$ iperf3 -R -c server1
Connecting to host server1, port 5201
Reverse mode, remote host server1 is sending
[ 4] local 192.168.0.205 port 42504 connected to 192.168.0.99 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 112 MBytes 936 Mbits/sec
[ 4] 1.00-2.00 sec 112 MBytes 941 Mbits/sec
[ 4] 2.00-3.00 sec 112 MBytes 941 Mbits/sec
[ 4] 3.00-4.00 sec 112 MBytes 941 Mbits/sec
[ 4] 4.00-5.00 sec 112 MBytes 941 Mbits/sec
[ 4] 5.00-6.00 sec 112 MBytes 941 Mbits/sec
[ 4] 6.00-7.00 sec 112 MBytes 942 Mbits/sec
[ 4] 7.00-8.00 sec 112 MBytes 941 Mbits/sec
[ 4] 8.00-9.00 sec 112 MBytes 942 Mbits/sec
[ 4] 9.00-10.00 sec 112 MBytes 941 Mbits/sec
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.10 GBytes 943 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 1.10 GBytes 941 Mbits/sec receiverosmc@osmc:~$ iperf3 -c server1
Connecting to host server1, port 5201
[ 4] local 192.168.0.205 port 42508 connected to 192.168.0.99 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 112 MBytes 939 Mbits/sec 0 2.28 MBytes
[ 4] 1.00-2.00 sec 112 MBytes 939 Mbits/sec 0 3.06 MBytes
[ 4] 2.00-3.00 sec 112 MBytes 939 Mbits/sec 1 1.59 MBytes
[ 4] 3.00-4.00 sec 112 MBytes 938 Mbits/sec 1 1.19 MBytes
[ 4] 4.00-5.00 sec 112 MBytes 938 Mbits/sec 0 1.28 MBytes
[ 4] 5.00-6.00 sec 112 MBytes 939 Mbits/sec 0 1.34 MBytes
[ 4] 6.00-7.00 sec 112 MBytes 939 Mbits/sec 0 1.38 MBytes
[ 4] 7.00-8.00 sec 112 MBytes 939 Mbits/sec 0 1.41 MBytes
[ 4] 8.00-9.00 sec 112 MBytes 939 Mbits/sec 1 1.00 MBytes
[ 4] 9.00-10.00 sec 112 MBytes 938 Mbits/sec 1 781 KBytes
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec 4 sender
[ 4] 0.00-10.00 sec 1.09 GBytes 936 Mbits/sec receiver
That looks a bit healthier