$ iperf3 -c 10.11.11.2 -p 5201 -t 20 -R -J STDOUT { "start": { "connected": [{ "socket": 5, "local_host": "10.11.11.3", "local_port": 60992, "remote_host": "10.11.11.2", "remote_port": 5201 }], "version": "iperf 3.16", "system_info": "Linux ubuntu-HP-ProBook-440-G5 6.17.0-20-generic #20~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Mar 19 01:28:37 UTC 2 x86_64", "timestamp": { "time": "Fri, 08 May 2026 20:14:39 GMT", "timesecs": 1778271279 }, "connecting_to": { "host": "10.11.11.2", "port": 5201 }, "cookie": "2fhmewj6ndwup5znhv7qttojnp4ppgqjwmrm", "tcp_mss_default": 1448, "target_bitrate": 0, "fq_rate": 0, "sock_bufsize": 0, "sndbuf_actual": 16384, "rcvbuf_actual": 131072, "test_start": { "protocol": "TCP", "num_streams": 1, "blksize": 131072, "omit": 0, "duration": 20, "bytes": 0, "blocks": 0, "reverse": 1, "tos": 0, "target_bitrate": 0, "bidir": 0, "fqrate": 0 } }, "intervals": [{ "streams": [{ "socket": 5, "start": 0, "end": 1.000904, "seconds": 1.0009039640426636, "bytes": 117702656, "bits_per_second": 940770825.00181139, "omitted": false, "sender": false }], "sum": { "start": 0, "end": 1.000904, "seconds": 1.0009039640426636, "bytes": 117702656, "bits_per_second": 940770825.00181139, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 1.000904, "end": 2.000908, "seconds": 1.0000040531158447, "bytes": 117702656, "bits_per_second": 941617431.5154686, "omitted": false, "sender": false }], "sum": { "start": 1.000904, "end": 2.000908, "seconds": 1.0000040531158447, "bytes": 117702656, "bits_per_second": 941617431.5154686, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 2.000908, "end": 3.000911, "seconds": 1.0000029802322388, "bytes": 117702656, "bits_per_second": 941618441.75836325, "omitted": false, "sender": false }], "sum": { "start": 2.000908, "end": 3.000911, "seconds": 1.0000029802322388, "bytes": 117702656, "bits_per_second": 941618441.75836325, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 3.000911, "end": 4.000835, "seconds": 0.99992400407791138, "bytes": 117571584, "bits_per_second": 940644157.12007761, "omitted": false, "sender": false }], "sum": { "start": 3.000911, "end": 4.000835, "seconds": 0.99992400407791138, "bytes": 117571584, "bits_per_second": 940644157.12007761, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 4.000835, "end": 5.000848, "seconds": 1.000012993812561, "bytes": 117702656, "bits_per_second": 941609012.90898049, "omitted": false, "sender": false }], "sum": { "start": 4.000835, "end": 5.000848, "seconds": 1.000012993812561, "bytes": 117702656, "bits_per_second": 941609012.90898049, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 5.000848, "end": 6.00085, "seconds": 1.0000020265579224, "bytes": 117702656, "bits_per_second": 941619339.753867, "omitted": false, "sender": false }], "sum": { "start": 5.000848, "end": 6.00085, "seconds": 1.0000020265579224, "bytes": 117702656, "bits_per_second": 941619339.753867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 6.00085, "end": 7.000849, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false }], "sum": { "start": 6.00085, "end": 7.000849, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 7.000849, "end": 8.000848, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false }], "sum": { "start": 7.000849, "end": 8.000848, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 8.000848, "end": 9.000851, "seconds": 1.0000029802322388, "bytes": 117702656, "bits_per_second": 941618441.75836325, "omitted": false, "sender": false }], "sum": { "start": 8.000848, "end": 9.000851, "seconds": 1.0000029802322388, "bytes": 117702656, "bits_per_second": 941618441.75836325, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 9.000851, "end": 10.00085, "seconds": 0.99999898672103882, "bytes": 117571584, "bits_per_second": 940573625.06346571, "omitted": false, "sender": false }], "sum": { "start": 9.000851, "end": 10.00085, "seconds": 0.99999898672103882, "bytes": 117571584, "bits_per_second": 940573625.06346571, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 10.00085, "end": 11.000849, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false }], "sum": { "start": 10.00085, "end": 11.000849, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 11.000849, "end": 12.00085, "seconds": 1.0000009536743164, "bytes": 117702656, "bits_per_second": 941620350.0008564, "omitted": false, "sender": false }], "sum": { "start": 11.000849, "end": 12.00085, "seconds": 1.0000009536743164, "bytes": 117702656, "bits_per_second": 941620350.0008564, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 12.00085, "end": 13.000854, "seconds": 1.0000040531158447, "bytes": 117571584, "bits_per_second": 940568859.76545143, "omitted": false, "sender": false }], "sum": { "start": 12.00085, "end": 13.000854, "seconds": 1.0000040531158447, "bytes": 117571584, "bits_per_second": 940568859.76545143, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 13.000854, "end": 14.000863, "seconds": 1.0000089406967163, "bytes": 117702656, "bits_per_second": 941612829.325269, "omitted": false, "sender": false }], "sum": { "start": 13.000854, "end": 14.000863, "seconds": 1.0000089406967163, "bytes": 117702656, "bits_per_second": 941612829.325269, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 14.000863, "end": 15.000853, "seconds": 0.99998998641967773, "bytes": 117702656, "bits_per_second": 941630677.094419, "omitted": false, "sender": false }], "sum": { "start": 14.000863, "end": 15.000853, "seconds": 0.99998998641967773, "bytes": 117702656, "bits_per_second": 941630677.094419, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 15.000853, "end": 16.000851, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false }], "sum": { "start": 15.000853, "end": 16.000851, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 16.000851, "end": 17.000849, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false }], "sum": { "start": 16.000851, "end": 17.000849, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 17.000849, "end": 18.000855, "seconds": 1.0000059604644775, "bytes": 117571584, "bits_per_second": 940567065.78341568, "omitted": false, "sender": false }], "sum": { "start": 17.000849, "end": 18.000855, "seconds": 1.0000059604644775, "bytes": 117571584, "bits_per_second": 940567065.78341568, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 18.000855, "end": 19.000863, "seconds": 1.0000079870224, "bytes": 117702656, "bits_per_second": 941613727.310068, "omitted": false, "sender": false }], "sum": { "start": 18.000855, "end": 19.000863, "seconds": 1.0000079870224, "bytes": 117702656, "bits_per_second": 941613727.310068, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 19.000863, "end": 20.000862, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false }], "sum": { "start": 19.000863, "end": 20.000862, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false } }], "end": { "streams": [{ "sender": { "socket": 5, "start": 0, "end": 20.000982, "seconds": 20.000982, "bytes": 2355494912, "bits_per_second": 942151705.151277, "retransmits": 0, "max_snd_cwnd": 0, "max_snd_wnd": 0, "max_rtt": 0, "min_rtt": 0, "mean_rtt": 0, "sender": false }, "receiver": { "socket": 5, "start": 0, "end": 20.000862, "seconds": 20.000862, "bytes": 2353659904, "bits_per_second": 941423386.25205243, "sender": false } }], "sum_sent": { "start": 0, "end": 20.000982, "seconds": 20.000982, "bytes": 2355494912, "bits_per_second": 942151705.151277, "retransmits": 0, "sender": false }, "sum_received": { "start": 0, "end": 20.000862, "seconds": 20.000862, "bytes": 2353659904, "bits_per_second": 941423386.25205243, "sender": false }, "cpu_utilization_percent": { "host_total": 15.417229222266155, "host_user": 1.6927454196185736, "host_system": 13.724473805361844, "remote_total": 1.610577860529113, "remote_user": 0.15295219943782867, "remote_system": 1.4576206613462714 }, "sender_tcp_congestion": "cubic", "receiver_tcp_congestion": "cubic" } } STDERR