$ iperf3 -c 10.11.11.2 -p 5201 -t 20 -J

STDOUT
{
	"start":	{
		"connected":	[{
				"socket":	5,
				"local_host":	"10.11.11.3",
				"local_port":	40370,
				"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 19:59:08 GMT",
			"timesecs":	1778270348
		},
		"connecting_to":	{
			"host":	"10.11.11.2",
			"port":	5201
		},
		"cookie":	"axfi4f6f3edhllwjm3dwuimlp52uwokc4xko",
		"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":	0,
			"tos":	0,
			"target_bitrate":	0,
			"bidir":	0,
			"fqrate":	0
		}
	},
	"intervals":	[{
			"streams":	[{
					"socket":	5,
					"start":	0,
					"end":	1.000357,
					"seconds":	1.0003570318222046,
					"bytes":	119537664,
					"bits_per_second":	955960003.857868,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	734208,
					"rtt":	2724,
					"rttvar":	91,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	0,
				"end":	1.000357,
				"seconds":	1.0003570318222046,
				"bytes":	119537664,
				"bits_per_second":	955960003.857868,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	1.000357,
					"end":	2.000312,
					"seconds":	0.99995499849319458,
					"bytes":	117309440,
					"bits_per_second":	938517754.71312571,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	744448,
					"rtt":	2710,
					"rttvar":	102,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	1.000357,
				"end":	2.000312,
				"seconds":	0.99995499849319458,
				"bytes":	117309440,
				"bits_per_second":	938517754.71312571,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	2.000312,
					"end":	3.00032,
					"seconds":	1.0000079870224,
					"bytes":	117964800,
					"bits_per_second":	943710862.56020164,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	690688,
					"rtt":	2759,
					"rttvar":	114,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	2.000312,
				"end":	3.00032,
				"seconds":	1.0000079870224,
				"bytes":	117964800,
				"bits_per_second":	943710862.56020164,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	3.00032,
					"end":	4.000322,
					"seconds":	1.0000020265579224,
					"bytes":	117178368,
					"bits_per_second":	937425044.25385,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	738304,
					"rtt":	2643,
					"rttvar":	137,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	3.00032,
				"end":	4.000322,
				"seconds":	1.0000020265579224,
				"bytes":	117178368,
				"bits_per_second":	937425044.25385,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	4.000322,
					"end":	5.000317,
					"seconds":	0.999994993209839,
					"bytes":	118358016,
					"bits_per_second":	946868868.773736,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	734208,
					"rtt":	2629,
					"rttvar":	113,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	4.000322,
				"end":	5.000317,
				"seconds":	0.999994993209839,
				"bytes":	118358016,
				"bits_per_second":	946868868.773736,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	5.000317,
					"end":	6.000314,
					"seconds":	0.99999701976776123,
					"bytes":	117440512,
					"bits_per_second":	939526896.00834465,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	730624,
					"rtt":	2657,
					"rttvar":	81,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	5.000317,
				"end":	6.000314,
				"seconds":	0.99999701976776123,
				"bytes":	117440512,
				"bits_per_second":	939526896.00834465,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	6.000314,
					"end":	7.000367,
					"seconds":	1.00005304813385,
					"bytes":	117964800,
					"bits_per_second":	943668340.15558136,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	744960,
					"rtt":	2677,
					"rttvar":	64,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	6.000314,
				"end":	7.000367,
				"seconds":	1.00005304813385,
				"bytes":	117964800,
				"bits_per_second":	943668340.15558136,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	7.000367,
					"end":	8.000329,
					"seconds":	0.9999619722366333,
					"bytes":	117178368,
					"bits_per_second":	937462593.60567474,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	744960,
					"rtt":	2693,
					"rttvar":	77,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	7.000367,
				"end":	8.000329,
				"seconds":	0.9999619722366333,
				"bytes":	117178368,
				"bits_per_second":	937462593.60567474,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	8.000329,
					"end":	9.000336,
					"seconds":	1.0000070333480835,
					"bytes":	118358016,
					"bits_per_second":	946857468.421839,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	725504,
					"rtt":	2698,
					"rttvar":	78,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	8.000329,
				"end":	9.000336,
				"seconds":	1.0000070333480835,
				"bytes":	118358016,
				"bits_per_second":	946857468.421839,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	9.000336,
					"end":	10.000316,
					"seconds":	0.99997997283935547,
					"bytes":	117309440,
					"bits_per_second":	938494315.376418,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	730624,
					"rtt":	2672,
					"rttvar":	75,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	9.000336,
				"end":	10.000316,
				"seconds":	0.99997997283935547,
				"bytes":	117309440,
				"bits_per_second":	938494315.376418,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	10.000316,
					"end":	11.000319,
					"seconds":	1.0000029802322388,
					"bytes":	117440512,
					"bits_per_second":	939521296.00834465,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	731136,
					"rtt":	2699,
					"rttvar":	75,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	10.000316,
				"end":	11.000319,
				"seconds":	1.0000029802322388,
				"bytes":	117440512,
				"bits_per_second":	939521296.00834465,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	11.000319,
					"end":	12.000367,
					"seconds":	1.000048041343689,
					"bytes":	118226944,
					"bits_per_second":	945770115.93280971,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	732672,
					"rtt":	2721,
					"rttvar":	68,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	11.000319,
				"end":	12.000367,
				"seconds":	1.000048041343689,
				"bytes":	118226944,
				"bits_per_second":	945770115.93280971,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	12.000367,
					"end":	13.001061,
					"seconds":	1.0006940364837646,
					"bytes":	117178368,
					"bits_per_second":	936776786.73286355,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	744960,
					"rtt":	2690,
					"rttvar":	133,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	12.000367,
				"end":	13.001061,
				"seconds":	1.0006940364837646,
				"bytes":	117178368,
				"bits_per_second":	936776786.73286355,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	13.001061,
					"end":	14.001062,
					"seconds":	1.0000009536743164,
					"bytes":	117964800,
					"bits_per_second":	943717500.00085831,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	691200,
					"rtt":	2776,
					"rttvar":	74,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	13.001061,
				"end":	14.001062,
				"seconds":	1.0000009536743164,
				"bytes":	117964800,
				"bits_per_second":	943717500.00085831,
				"retransmits":	0,
				"omitted":	false,
				"sender":	true
			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	14.001062,
					"end":	15.001062,
					"seconds":	1,
					"bytes":	117178368,
					"bits_per_second":	937426944,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	700416,
					"rtt":	2726,
					"rttvar":	99,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	14.001062,
				"end":	15.001062,
				"seconds":	1,
				"bytes":	117178368,
				"bits_per_second":	937426944,
				"retransmits":	0,
				"omitted":	false,
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			}
		}, {
			"streams":	[{
					"socket":	5,
					"start":	15.001062,
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					"seconds":	0.99999898672103882,
					"bytes":	118095872,
					"bits_per_second":	944767933.31347,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	691200,
					"rtt":	2723,
					"rttvar":	222,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	15.001062,
				"end":	16.001061,
				"seconds":	0.99999898672103882,
				"bytes":	118095872,
				"bits_per_second":	944767933.31347,
				"retransmits":	0,
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			}
		}, {
			"streams":	[{
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					"start":	16.001061,
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					"seconds":	1.0000050067901611,
					"bytes":	117964800,
					"bits_per_second":	943713675.023657,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	692736,
					"rtt":	2657,
					"rttvar":	189,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	16.001061,
				"end":	17.001066,
				"seconds":	1.0000050067901611,
				"bytes":	117964800,
				"bits_per_second":	943713675.023657,
				"retransmits":	0,
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			}
		}, {
			"streams":	[{
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					"seconds":	0.9999960064888,
					"bytes":	117309440,
					"bits_per_second":	938479267.827467,
					"retransmits":	0,
					"snd_cwnd":	448880,
					"snd_wnd":	744960,
					"rtt":	2689,
					"rttvar":	116,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	17.001066,
				"end":	18.001062,
				"seconds":	0.9999960064888,
				"bytes":	117309440,
				"bits_per_second":	938479267.827467,
				"retransmits":	0,
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			}
		}, {
			"streams":	[{
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					"start":	18.001062,
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					"seconds":	1.0000020265579224,
					"bytes":	117440512,
					"bits_per_second":	939522192.00385857,
					"retransmits":	0,
					"snd_cwnd":	448880,
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					"rttvar":	116,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	18.001062,
				"end":	19.001064,
				"seconds":	1.0000020265579224,
				"bytes":	117440512,
				"bits_per_second":	939522192.00385857,
				"retransmits":	0,
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			}
		}, {
			"streams":	[{
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					"seconds":	1.00032901763916,
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					"bits_per_second":	945504464.353323,
					"retransmits":	0,
					"snd_cwnd":	448880,
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					"rtt":	2688,
					"rttvar":	88,
					"pmtu":	1500,
					"omitted":	false,
					"sender":	true
				}],
			"sum":	{
				"start":	19.001064,
				"end":	20.001393,
				"seconds":	1.00032901763916,
				"bytes":	118226944,
				"bits_per_second":	945504464.353323,
				"retransmits":	0,
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			}
		}],
	"end":	{
		"streams":	[{
				"sender":	{
					"socket":	5,
					"start":	0,
					"end":	20.001393,
					"seconds":	20.001393,
					"bytes":	2355625984,
					"bits_per_second":	942184770.43073952,
					"retransmits":	0,
					"max_snd_cwnd":	448880,
					"max_snd_wnd":	745472,
					"max_rtt":	2776,
					"min_rtt":	2629,
					"mean_rtt":	2695,
					"sender":	true
				},
				"receiver":	{
					"socket":	5,
					"start":	0,
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					"seconds":	20.001393,
					"bytes":	2353528832,
					"bits_per_second":	941217077.351819,
					"sender":	true
				}
			}],
		"sum_sent":	{
			"start":	0,
			"end":	20.001393,
			"seconds":	20.001393,
			"bytes":	2355625984,
			"bits_per_second":	942184770.43073952,
			"retransmits":	0,
			"sender":	true
		},
		"sum_received":	{
			"start":	0,
			"end":	20.004132,
			"seconds":	20.004132,
			"bytes":	2353528832,
			"bits_per_second":	941217077.351819,
			"sender":	true
		},
		"cpu_utilization_percent":	{
			"host_total":	2.2087046761901616,
			"host_user":	0.047315464565849376,
			"host_system":	2.1613742193985308,
			"remote_total":	8.06761370930298,
			"remote_user":	1.015228426395939,
			"remote_system":	7.0523802839488257
		},
		"sender_tcp_congestion":	"cubic",
		"receiver_tcp_congestion":	"cubic"
	}
}

STDERR
