Vous pourriez faire le même test iperf3, en UDP, pour le traffic montant (par exemple avec -u -b 200M, et sans -R) ?
Linux debian 4.19.0-11-amd64 #1 SMP Debian 4.19.146-1 (2020-09-17) x86_64
Control connection MSS 1448
Setting UDP block size to 1448
Time: Sat, 17 Oct 2020 12:27:42 GMT
Connecting to host scaleway.testdebit.info, port 9222
Cookie: 3ugoia2roh4jt523r6tlava6jswbvfrfln6t
Target Bitrate: 200000000
[ 5] local 45.15.***.*** port 48502 connected to 62.210.156.7 port 9222
[ 7] local 45.15.***.*** port 48084 connected to 62.210.156.7 port 9222
[ 9] local 45.15.***.*** port 43634 connected to 62.210.156.7 port 9222
[ 11] local 45.15.***.*** port 39476 connected to 62.210.156.7 port 9222
Starting Test: protocol: UDP, 4 streams, 1448 byte blocks, omitting 0 seconds, 6 second test, tos 0
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 2.88 MBytes 24.2 Mbits/sec 2087
[ 7] 0.00-1.00 sec 2.88 MBytes 24.2 Mbits/sec 2087
[ 9] 0.00-1.00 sec 2.88 MBytes 24.2 Mbits/sec 2087
[ 11] 0.00-1.00 sec 2.88 MBytes 24.2 Mbits/sec 2087
[SUM] 0.00-1.00 sec 11.5 MBytes 96.7 Mbits/sec 8348
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 5] 1.00-2.00 sec 2.85 MBytes 23.9 Mbits/sec 2065
[ 7] 1.00-2.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 9] 1.00-2.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 11] 1.00-2.00 sec 2.85 MBytes 23.9 Mbits/sec 2063
[SUM] 1.00-2.00 sec 11.4 MBytes 95.6 Mbits/sec 8256
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 5] 2.00-3.00 sec 2.85 MBytes 23.9 Mbits/sec 2063
[ 7] 2.00-3.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 9] 2.00-3.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 11] 2.00-3.00 sec 2.85 MBytes 23.9 Mbits/sec 2065
[SUM] 2.00-3.00 sec 11.4 MBytes 95.6 Mbits/sec 8256
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 5] 3.00-4.00 sec 2.85 MBytes 23.9 Mbits/sec 2065
[ 7] 3.00-4.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 9] 3.00-4.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 11] 3.00-4.00 sec 2.85 MBytes 23.9 Mbits/sec 2063
[SUM] 3.00-4.00 sec 11.4 MBytes 95.6 Mbits/sec 8256
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 5] 4.00-5.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 7] 4.00-5.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 9] 4.00-5.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 11] 4.00-5.00 sec 2.85 MBytes 23.9 Mbits/sec 2065
[SUM] 4.00-5.00 sec 11.4 MBytes 95.6 Mbits/sec 8257
- - - - - - - - - - - - - - - - - - - - - - - - -
[ 5] 5.00-6.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 7] 5.00-6.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 9] 5.00-6.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[ 11] 5.00-6.00 sec 2.85 MBytes 23.9 Mbits/sec 2064
[SUM] 5.00-6.00 sec 11.4 MBytes 95.6 Mbits/sec 8256
- - - - - - - - - - - - - - - - - - - - - - - - -
Test Complete. Summary Results:
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-6.00 sec 17.1 MBytes 24.0 Mbits/sec 0.000 ms 0/12408 (0%) sender
[ 5] 0.00-6.03 sec 15.4 MBytes 21.4 Mbits/sec 0.085 ms 1271/12408 (10%) receiver
[ 7] 0.00-6.00 sec 17.1 MBytes 24.0 Mbits/sec 0.000 ms 0/12407 (0%) sender
[ 7] 0.00-6.03 sec 17.1 MBytes 23.8 Mbits/sec 0.074 ms 0/12407 (0%) receiver
[ 9] 0.00-6.00 sec 17.1 MBytes 24.0 Mbits/sec 0.000 ms 0/12407 (0%) sender
[ 9] 0.00-6.03 sec 15.5 MBytes 21.6 Mbits/sec 0.081 ms 1153/12407 (9.3%) receiver
[ 11] 0.00-6.00 sec 17.1 MBytes 24.0 Mbits/sec 0.000 ms 0/12407 (0%) sender
[ 11] 0.00-6.03 sec 17.1 MBytes 23.8 Mbits/sec 0.074 ms 0/12406 (0%) receiver
[SUM] 0.00-6.00 sec 68.5 MBytes 95.8 Mbits/sec 0.000 ms 0/49629 (0%) sender
[SUM] 0.00-6.03 sec 65.2 MBytes 90.6 Mbits/sec 0.079 ms 2424/49628 (4.9%) receiver
CPU Utilization: local/sender 17.8% (1.5%u/16.3%s), remote/receiver 0.8% (0.1%u/0.7%s)