$ 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": 46926, "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 19:59:38 GMT", "timesecs": 1778270378 }, "connecting_to": { "host": "10.11.11.2", "port": 5201 }, "cookie": "g3brv4ry2lpgxdizd7ncgg2wsjo5zednhmld", "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": 1.000655, "seconds": 1.0006550550460815, "bytes": 117178368, "bits_per_second": 936813279.733874, "omitted": false, "sender": false }], "sum": { "start": 0, "end": 1.000655, "seconds": 1.0006550550460815, "bytes": 117178368, "bits_per_second": 936813279.733874, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 1.000655, "end": 2.000646, "seconds": 0.999990999698639, "bytes": 117571584, "bits_per_second": 940581137.513692, "omitted": false, "sender": false }], "sum": { "start": 1.000655, "end": 2.000646, "seconds": 0.999990999698639, "bytes": 117571584, "bits_per_second": 940581137.513692, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 2.000646, "end": 3.000651, "seconds": 1.0000050067901611, "bytes": 117702656, "bits_per_second": 941616533.52360439, "omitted": false, "sender": false }], "sum": { "start": 2.000646, "end": 3.000651, "seconds": 1.0000050067901611, "bytes": 117702656, "bits_per_second": 941616533.52360439, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 3.000651, "end": 4.000647, "seconds": 0.9999960064888, "bytes": 117702656, "bits_per_second": 941625008.390017, "omitted": false, "sender": false }], "sum": { "start": 3.000651, "end": 4.000647, "seconds": 0.9999960064888, "bytes": 117702656, "bits_per_second": 941625008.390017, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 4.000647, "end": 5.000648, "seconds": 1.0000009536743164, "bytes": 117702656, "bits_per_second": 941620350.0008564, "omitted": false, "sender": false }], "sum": { "start": 4.000647, "end": 5.000648, "seconds": 1.0000009536743164, "bytes": 117702656, "bits_per_second": 941620350.0008564, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 5.000648, "end": 6.000647, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false }], "sum": { "start": 5.000648, "end": 6.000647, "seconds": 0.99999898672103882, "bytes": 117702656, "bits_per_second": 941622202.12596679, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 6.000647, "end": 7.000645, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false }], "sum": { "start": 6.000647, "end": 7.000645, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 7.000645, "end": 8.000647, "seconds": 1.0000020265579224, "bytes": 117702656, "bits_per_second": 941619339.753867, "omitted": false, "sender": false }], "sum": { "start": 7.000645, "end": 8.000647, "seconds": 1.0000020265579224, "bytes": 117702656, "bits_per_second": 941619339.753867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 8.000647, "end": 9.001096, "seconds": 1.0004489421844482, "bytes": 117702656, "bits_per_second": 941198704.19773757, "omitted": false, "sender": false }], "sum": { "start": 8.000647, "end": 9.001096, "seconds": 1.0004489421844482, "bytes": 117702656, "bits_per_second": 941198704.19773757, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 9.001096, "end": 10.00071, "seconds": 0.99961400032043457, "bytes": 117571584, "bits_per_second": 940935872.94544852, "omitted": false, "sender": false }], "sum": { "start": 9.001096, "end": 10.00071, "seconds": 0.99961400032043457, "bytes": 117571584, "bits_per_second": 940935872.94544852, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 10.00071, "end": 11.000704, "seconds": 0.99999397993087769, "bytes": 117702656, "bits_per_second": 941626916.65912569, "omitted": false, "sender": false }], "sum": { "start": 10.00071, "end": 11.000704, "seconds": 0.99999397993087769, "bytes": 117702656, "bits_per_second": 941626916.65912569, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 11.000704, "end": 12.001088, "seconds": 1.0003839731216431, "bytes": 117833728, "bits_per_second": 942308003.054518, "omitted": false, "sender": false }], "sum": { "start": 11.000704, "end": 12.001088, "seconds": 1.0003839731216431, "bytes": 117833728, "bits_per_second": 942308003.054518, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 12.001088, "end": 13.00071, "seconds": 0.99962198734283447, "bytes": 117571584, "bits_per_second": 940928354.82761073, "omitted": false, "sender": false }], "sum": { "start": 12.001088, "end": 13.00071, "seconds": 0.99962198734283447, "bytes": 117571584, "bits_per_second": 940928354.82761073, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 13.00071, "end": 14.000693, "seconds": 0.999983012676239, "bytes": 117702656, "bits_per_second": 941637243.89672744, "omitted": false, "sender": false }], "sum": { "start": 13.00071, "end": 14.000693, "seconds": 0.999983012676239, "bytes": 117702656, "bits_per_second": 941637243.89672744, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 14.000693, "end": 15.000691, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false }], "sum": { "start": 14.000693, "end": 15.000691, "seconds": 0.99999797344207764, "bytes": 117702656, "bits_per_second": 941623156.253867, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 15.000691, "end": 16.000646, "seconds": 0.99995499849319458, "bytes": 117571584, "bits_per_second": 940615001.092373, "omitted": false, "sender": false }], "sum": { "start": 15.000691, "end": 16.000646, "seconds": 0.99995499849319458, "bytes": 117571584, "bits_per_second": 940615001.092373, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 16.000646, "end": 17.001045, "seconds": 1.0003989934921265, "bytes": 117833728, "bits_per_second": 942293854.88423038, "omitted": false, "sender": false }], "sum": { "start": 16.000646, "end": 17.001045, "seconds": 1.0003989934921265, "bytes": 117833728, "bits_per_second": 942293854.88423038, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 17.001045, "end": 18.000647, "seconds": 0.99960201978683472, "bytes": 117571584, "bits_per_second": 940947150.34747255, "omitted": false, "sender": false }], "sum": { "start": 17.001045, "end": 18.000647, "seconds": 0.99960201978683472, "bytes": 117571584, "bits_per_second": 940947150.34747255, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 18.000647, "end": 19.001044, "seconds": 1.0003969669342041, "bytes": 117702656, "bits_per_second": 941247603.824383, "omitted": false, "sender": false }], "sum": { "start": 18.000647, "end": 19.001044, "seconds": 1.0003969669342041, "bytes": 117702656, "bits_per_second": 941247603.824383, "omitted": false, "sender": false } }, { "streams": [{ "socket": 5, "start": 19.001044, "end": 20.000663, "seconds": 0.9996190071105957, "bytes": 117571584, "bits_per_second": 940931160.08141, "omitted": false, "sender": false }], "sum": { "start": 19.001044, "end": 20.000663, "seconds": 0.9996190071105957, "bytes": 117571584, "bits_per_second": 940931160.08141, "omitted": false, "sender": false } }], "end": { "streams": [{ "sender": { "socket": 5, "start": 0, "end": 20.001335, "seconds": 20.001335, "bytes": 2355757056, "bits_per_second": 942239927.88481367, "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": 20.000663, "seconds": 20.000663, "bytes": 2353135616, "bits_per_second": 941223044.856063, "sender": false } }], "sum_sent": { "start": 0, "end": 20.001335, "seconds": 20.001335, "bytes": 2355757056, "bits_per_second": 942239927.88481367, "retransmits": 0, "sender": false }, "sum_received": { "start": 0, "end": 20.000663, "seconds": 20.000663, "bytes": 2353135616, "bits_per_second": 941223044.856063, "sender": false }, "cpu_utilization_percent": { "host_total": 15.107873218606024, "host_user": 1.4462312194704567, "host_system": 13.661641999135568, "remote_total": 1.8460988191457115, "remote_user": 0.076149795161500722, "remote_system": 1.7699440243259374 }, "sender_tcp_congestion": "cubic", "receiver_tcp_congestion": "cubic" } } STDERR