Rakuten Mobile の MTU を調べる

Summary ¶

Rakuten Mobile では弊宅の ToR として利用していている home 5G (hr01) の MTU 値 1440 となった。この値が基準で LAN 内の設計を実施する

条件 ¶

Key	value
計測時間	22:00-27:00 頃
計測地	東京某所

Key	計測鯖	Rakuten Mobile	Vultr Tokyo
通信感度		3本	対外 5Gbps
使用機材		home 5G HR01	1024.00 MB Regular Cloud Compute
OS	Ubuntu 22.04		Ubuntu 22.04
iperf3	3.9 (cJSON 1.7.13)		3.9 (cJSON 1.7.13)

home 5G HR01 は MTU 1440 を配布してくる模様 WireSharkで確認

コマンドパラメータ ¶

共通 ¶

オプション	説明
-f, –format [kmKM]	出力される結果のbandwidthの単位を指定できる。 ‘k’ = Kbits/sec ‘K’ = KBytes/sec ’m’ = Mbits/sec ‘M’ = MBytes/sec
-i, –interval n	n秒ごとにbandwidth、jitter、lossの結果を出す。

Server ¶

オプション	説明
-s, –server	iperfサーバを起動する

Client ¶

オプション	説明
-c, –client host	iperfクライアントを起動し, hostに対して接続する
-t, –time n	n秒間通信を行う, デフォルトは10秒
-l, –length n[KM]	書き込むor読み込むバッファの長さを指定する TCPはデフォルト128KB,UDPはデフォルト8KB
-P, –parallel n	n個のコネクションを同時に接続するデフォルトは1つ。
-R, –reverse	サーバが送信、クライアントが受信を行う (デフォルトはサーバが受信、クライアントが送信)
-M, –set-mss n	TCPの最大セグメントサイズ(MSS)の設定を試みるイーサネットの場合、通常1460バイト(MTU1500バイト)

速度テスト ¶

MTU	1280	1360	1400	1440	1500
TCP Download	61.9	72.6	61.8	76.0	79.9
UDP Download	81.3	80.9	70.1	73.7	73.9
TCP Upload	41.1	36.0	40.0	41.0	41.9
UDP Upload	34.6	35.5	44.4	43.8	11.8
Avg	54.7	56.3	54.1	58.6	52.0

※単位は Mbps, 設定 MTU 1440 が一番良いのでこれを採用する。

Download TCP

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for i in 1280 1360 1400 1440 1500
do
  echo -e "MTU: ${i}\n\n"
  set -x
  iperf3 -c 203.0.113.2 -t 300 -l $(( ${i} - 40 )) -i 30 -T "TCP DL MTU${i}" -R
  set +x
  echo -e "==============\n\n"
done

MTU: 1280
+ iperf3 -c 203.0.113.2 -t 300 -l 1240 -i 30 -T 'TCP DL MTU1280' -R
TCP DL MTU1280:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1280:  Reverse mode, remote host 203.0.113.2 is sending
TCP DL MTU1280:  [  5] local 192.168.13.81 port 39378 connected to 203.0.113.2 port 5201
TCP DL MTU1280:  [ ID] Interval           Transfer     Bitrate
TCP DL MTU1280:  [  5]   0.00-30.00  sec   223 MBytes  62.5 Mbits/sec
TCP DL MTU1280:  [  5]  30.00-60.00  sec   263 MBytes  73.5 Mbits/sec
TCP DL MTU1280:  [  5]  60.00-90.00  sec   217 MBytes  60.5 Mbits/sec
TCP DL MTU1280:  [  5]  90.00-120.00 sec   201 MBytes  56.2 Mbits/sec
TCP DL MTU1280:  [  5] 120.00-150.00 sec   191 MBytes  53.4 Mbits/sec
TCP DL MTU1280:  [  5] 150.00-180.00 sec   198 MBytes  55.3 Mbits/sec
TCP DL MTU1280:  [  5] 180.00-210.00 sec   191 MBytes  53.5 Mbits/sec
TCP DL MTU1280:  [  5] 210.00-240.00 sec   211 MBytes  59.1 Mbits/sec
TCP DL MTU1280:  [  5] 240.00-270.00 sec   259 MBytes  72.4 Mbits/sec
TCP DL MTU1280:  [  5] 270.00-300.00 sec   260 MBytes  72.7 Mbits/sec
TCP DL MTU1280:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1280:  [  5]   0.00-300.04 sec  2.17 GBytes  62.0 Mbits/sec  55620             sender
TCP DL MTU1280:  [  5]   0.00-300.00 sec  2.16 GBytes  61.9 Mbits/sec                  receiver
TCP DL MTU1280:
TCP DL MTU1280:  iperf Done.
+ set +x
==============


MTU: 1360
+ iperf3 -c 203.0.113.2 -t 300 -l 1320 -i 30 -T 'TCP DL MTU1360' -R
TCP DL MTU1360:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1360:  Reverse mode, remote host 203.0.113.2 is sending
TCP DL MTU1360:  [  5] local 192.168.13.81 port 60868 connected to 203.0.113.2 port 5201
TCP DL MTU1360:  [ ID] Interval           Transfer     Bitrate
TCP DL MTU1360:  [  5]   0.00-30.00  sec   233 MBytes  65.2 Mbits/sec
TCP DL MTU1360:  [  5]  30.00-60.00  sec   249 MBytes  69.5 Mbits/sec
TCP DL MTU1360:  [  5]  60.00-90.00  sec   220 MBytes  61.5 Mbits/sec
TCP DL MTU1360:  [  5]  90.00-120.00 sec   234 MBytes  65.5 Mbits/sec
TCP DL MTU1360:  [  5] 120.00-150.00 sec   284 MBytes  79.4 Mbits/sec
TCP DL MTU1360:  [  5] 150.00-180.00 sec   286 MBytes  80.1 Mbits/sec
TCP DL MTU1360:  [  5] 180.00-210.00 sec   295 MBytes  82.5 Mbits/sec
TCP DL MTU1360:  [  5] 210.00-240.00 sec   250 MBytes  69.9 Mbits/sec
TCP DL MTU1360:  [  5] 240.00-270.00 sec   239 MBytes  66.9 Mbits/sec
TCP DL MTU1360:  [  5] 270.00-300.00 sec   307 MBytes  85.9 Mbits/sec
TCP DL MTU1360:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1360:  [  5]   0.00-300.05 sec  2.54 GBytes  72.8 Mbits/sec  57733             sender
TCP DL MTU1360:  [  5]   0.00-300.00 sec  2.54 GBytes  72.6 Mbits/sec                  receiver
TCP DL MTU1360:
TCP DL MTU1360:  iperf Done.
+ set +x
==============


MTU: 1400
+ iperf3 -c 203.0.113.2 -t 300 -l 1360 -i 30 -T 'TCP DL MTU1400' -R
TCP DL MTU1400:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1400:  Reverse mode, remote host 203.0.113.2 is sending
TCP DL MTU1400:  [  5] local 192.168.13.81 port 38754 connected to 203.0.113.2 port 5201
TCP DL MTU1400:  [ ID] Interval           Transfer     Bitrate
TCP DL MTU1400:  [  5]   0.00-30.00  sec   326 MBytes  91.1 Mbits/sec
TCP DL MTU1400:  [  5]  30.00-60.00  sec   137 MBytes  38.4 Mbits/sec
TCP DL MTU1400:  [  5]  60.00-90.00  sec   242 KBytes  65.9 Kbits/sec
TCP DL MTU1400:  [  5]  90.00-120.00 sec   223 MBytes  62.2 Mbits/sec
TCP DL MTU1400:  [  5] 120.00-150.00 sec   245 MBytes  68.4 Mbits/sec
TCP DL MTU1400:  [  5] 150.00-180.00 sec   257 MBytes  71.9 Mbits/sec
TCP DL MTU1400:  [  5] 180.00-210.00 sec   292 MBytes  81.8 Mbits/sec
TCP DL MTU1400:  [  5] 210.00-240.00 sec   242 MBytes  67.7 Mbits/sec
TCP DL MTU1400:  [  5] 240.00-270.00 sec   231 MBytes  64.6 Mbits/sec
TCP DL MTU1400:  [  5] 270.00-300.00 sec   257 MBytes  71.8 Mbits/sec
TCP DL MTU1400:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1400:  [  5]   0.00-300.05 sec  2.17 GBytes  62.0 Mbits/sec  60282             sender
TCP DL MTU1400:  [  5]   0.00-300.00 sec  2.16 GBytes  61.8 Mbits/sec                  receiver
TCP DL MTU1400:
TCP DL MTU1400:  iperf Done.
+ set +x
==============


MTU: 1440
+ iperf3 -c 203.0.113.2 -t 300 -l 1400 -i 30 -T 'TCP DL MTU1440' -R
TCP DL MTU1440:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1440:  Reverse mode, remote host 203.0.113.2 is sending
TCP DL MTU1440:  [  5] local 192.168.13.81 port 52554 connected to 203.0.113.2 port 5201
TCP DL MTU1440:  [ ID] Interval           Transfer     Bitrate
TCP DL MTU1440:  [  5]   0.00-30.00  sec   237 MBytes  66.3 Mbits/sec
TCP DL MTU1440:  [  5]  30.00-60.00  sec   222 MBytes  62.1 Mbits/sec
TCP DL MTU1440:  [  5]  60.00-90.00  sec   243 MBytes  67.8 Mbits/sec
TCP DL MTU1440:  [  5]  90.00-120.00 sec   254 MBytes  71.1 Mbits/sec
TCP DL MTU1440:  [  5] 120.00-150.00 sec   272 MBytes  76.1 Mbits/sec
TCP DL MTU1440:  [  5] 150.00-180.00 sec   265 MBytes  74.1 Mbits/sec
TCP DL MTU1440:  [  5] 180.00-210.00 sec   315 MBytes  88.1 Mbits/sec
TCP DL MTU1440:  [  5] 210.00-240.00 sec   305 MBytes  85.3 Mbits/sec
TCP DL MTU1440:  [  5] 240.00-270.00 sec   290 MBytes  81.1 Mbits/sec
TCP DL MTU1440:  [  5] 270.00-300.00 sec   315 MBytes  88.1 Mbits/sec
TCP DL MTU1440:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1440:  [  5]   0.00-300.05 sec  2.66 GBytes  76.2 Mbits/sec  67487             sender
TCP DL MTU1440:  [  5]   0.00-300.00 sec  2.65 GBytes  76.0 Mbits/sec                  receiver
TCP DL MTU1440:
TCP DL MTU1440:  iperf Done.
+ set +x
==============


MTU: 1500
+ iperf3 -c 203.0.113.2 -t 300 -l 1460 -i 30 -T 'TCP DL MTU1500' -R
TCP DL MTU1500:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1500:  Reverse mode, remote host 203.0.113.2 is sending
TCP DL MTU1500:  [  5] local 192.168.13.81 port 55202 connected to 203.0.113.2 port 5201
TCP DL MTU1500:  [ ID] Interval           Transfer     Bitrate
TCP DL MTU1500:  [  5]   0.00-30.00  sec   256 MBytes  71.6 Mbits/sec
TCP DL MTU1500:  [  5]  30.00-60.00  sec   322 MBytes  89.9 Mbits/sec
TCP DL MTU1500:  [  5]  60.00-90.00  sec   298 MBytes  83.2 Mbits/sec
TCP DL MTU1500:  [  5]  90.00-120.00 sec   306 MBytes  85.5 Mbits/sec
TCP DL MTU1500:  [  5] 120.00-150.00 sec   281 MBytes  78.5 Mbits/sec
TCP DL MTU1500:  [  5] 150.00-180.00 sec   280 MBytes  78.3 Mbits/sec
TCP DL MTU1500:  [  5] 180.00-210.00 sec   320 MBytes  89.5 Mbits/sec
TCP DL MTU1500:  [  5] 210.00-240.00 sec   302 MBytes  84.4 Mbits/sec
TCP DL MTU1500:  [  5] 240.00-270.00 sec   238 MBytes  66.5 Mbits/sec
TCP DL MTU1500:  [  5] 270.00-300.00 sec   255 MBytes  71.2 Mbits/sec
TCP DL MTU1500:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1500:  [  5]   0.00-300.07 sec  2.80 GBytes  80.0 Mbits/sec  71667             sender
TCP DL MTU1500:  [  5]   0.00-300.00 sec  2.79 GBytes  79.9 Mbits/sec                  receiver
TCP DL MTU1500:
TCP DL MTU1500:  iperf Done.
+ set +x
==============

Download UDP

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for i in 1280 1360 1400 1440 1500
do
  echo -e "MTU: ${i}\n\n"
  set -x
  iperf3 -c 203.0.113.2 -t 300 -l $(( ${i} - 28 )) -i 30 -T "UDP DL MTU${i}" -u -b 200M -R
  set +x
  echo -e "==============\n\n"
done

MTU: 1280
+ iperf3 -c 203.0.113.2 -t 300 -l 1252 -i 30 -T 'UDP DL MTU1280' -u -b 200M -R
UDP DL MTU1280:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1280:  Reverse mode, remote host 203.0.113.2 is sending
UDP DL MTU1280:  [  5] local 192.168.13.81 port 54205 connected to 203.0.113.2 port 5201
UDP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1280:  [  5]   0.00-30.00  sec   299 MBytes  83.7 Mbits/sec  0.298 ms  348798/599572 (58%)
UDP DL MTU1280:  [  5]  30.00-60.00  sec   291 MBytes  81.3 Mbits/sec  0.111 ms  356213/599791 (59%)
UDP DL MTU1280:  [  5]  60.00-90.00  sec   300 MBytes  83.8 Mbits/sec  0.303 ms  347667/598604 (58%)
UDP DL MTU1280:  [  5]  90.00-120.00 sec   285 MBytes  79.8 Mbits/sec  0.081 ms  360517/599608 (60%)
UDP DL MTU1280:  [  5] 120.00-150.00 sec   295 MBytes  82.6 Mbits/sec  0.776 ms  350493/597859 (59%)
UDP DL MTU1280:  [  5] 150.00-180.00 sec   292 MBytes  81.6 Mbits/sec  0.145 ms  355376/599916 (59%)
UDP DL MTU1280:  [  5] 180.00-210.00 sec   289 MBytes  80.7 Mbits/sec  0.188 ms  357290/599068 (60%)
UDP DL MTU1280:  [  5] 210.00-240.00 sec   286 MBytes  79.9 Mbits/sec  0.179 ms  358878/598327 (60%)
UDP DL MTU1280:  [  5] 240.00-270.00 sec   282 MBytes  79.0 Mbits/sec  0.191 ms  362609/599132 (61%)
UDP DL MTU1280:  [  5] 270.00-300.00 sec   286 MBytes  80.0 Mbits/sec  0.121 ms  360392/599973 (60%)
UDP DL MTU1280:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1280:  [  5]   0.00-300.56 sec  7.00 GBytes   200 Mbits/sec  0.000 ms  0/6001542 (0%)  sender
UDP DL MTU1280:  [SUM]  0.0-300.6 sec  1559 datagrams received out-of-order
UDP DL MTU1280:  [  5]   0.00-300.00 sec  2.84 GBytes  81.3 Mbits/sec  0.121 ms  3558233/5991850 (59%)  receiver
UDP DL MTU1280:
UDP DL MTU1280:  iperf Done.
+ set +x
==============


MTU: 1360
+ iperf3 -c 203.0.113.2 -t 300 -l 1332 -i 30 -T 'UDP DL MTU1360' -u -b 200M -R
warning: UDP block size 1332 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1360:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1360:  Reverse mode, remote host 203.0.113.2 is sending
UDP DL MTU1360:  [  5] local 192.168.13.81 port 53114 connected to 203.0.113.2 port 5201
UDP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1360:  [  5]   0.00-30.00  sec   296 MBytes  82.7 Mbits/sec  0.081 ms  326148/558881 (58%)
UDP DL MTU1360:  [  5]  30.00-60.00  sec   307 MBytes  85.9 Mbits/sec  0.253 ms  321050/562991 (57%)
UDP DL MTU1360:  [  5]  60.00-90.00  sec   283 MBytes  79.2 Mbits/sec  0.092 ms  339712/562751 (60%)
UDP DL MTU1360:  [  5]  90.00-120.00 sec   301 MBytes  84.2 Mbits/sec  0.102 ms  326136/563066 (58%)
UDP DL MTU1360:  [  5] 120.00-150.00 sec   292 MBytes  81.7 Mbits/sec  0.290 ms  332313/562383 (59%)
UDP DL MTU1360:  [  5] 150.00-180.00 sec   290 MBytes  81.1 Mbits/sec  0.168 ms  335347/563809 (59%)
UDP DL MTU1360:  [  5] 180.00-210.00 sec   283 MBytes  79.0 Mbits/sec  0.103 ms  341150/563610 (61%)
UDP DL MTU1360:  [  5] 210.00-240.00 sec   305 MBytes  85.4 Mbits/sec  0.244 ms  322527/562966 (57%)
UDP DL MTU1360:  [  5] 240.00-270.00 sec   275 MBytes  76.9 Mbits/sec  0.094 ms  344737/561248 (61%)
UDP DL MTU1360:  [  5] 270.00-300.00 sec   260 MBytes  72.8 Mbits/sec  0.167 ms  359687/564637 (64%)
UDP DL MTU1360:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1360:  [  5]   0.00-300.30 sec  6.99 GBytes   200 Mbits/sec  0.000 ms  0/5636190 (0%)  sender
UDP DL MTU1360:  [SUM]  0.0-300.3 sec  1305 datagrams received out-of-order
UDP DL MTU1360:  [  5]   0.00-300.00 sec  2.83 GBytes  80.9 Mbits/sec  0.167 ms  3348807/5626342 (60%)  receiver
UDP DL MTU1360:
UDP DL MTU1360:  iperf Done.
+ set +x
==============


MTU: 1400
+ iperf3 -c 203.0.113.2 -t 300 -l 1372 -i 30 -T 'UDP DL MTU1400' -u -b 200M -R
warning: UDP block size 1372 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1400:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1400:  Reverse mode, remote host 203.0.113.2 is sending
UDP DL MTU1400:  [  5] local 192.168.13.81 port 48696 connected to 203.0.113.2 port 5201
UDP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1400:  [  5]   0.00-30.00  sec   244 MBytes  68.2 Mbits/sec  0.301 ms  358317/544742 (66%)
UDP DL MTU1400:  [  5]  30.00-60.00  sec   266 MBytes  74.3 Mbits/sec  0.113 ms  343794/546852 (63%)
UDP DL MTU1400:  [  5]  60.00-90.00  sec   262 MBytes  73.2 Mbits/sec  0.227 ms  346329/546348 (63%)
UDP DL MTU1400:  [  5]  90.00-120.00 sec   253 MBytes  70.9 Mbits/sec  0.104 ms  353093/546749 (65%)
UDP DL MTU1400:  [  5] 120.00-150.00 sec   257 MBytes  71.9 Mbits/sec  0.250 ms  350038/546534 (64%)
UDP DL MTU1400:  [  5] 150.00-180.00 sec   225 MBytes  62.8 Mbits/sec  0.361 ms  374751/546487 (69%)
UDP DL MTU1400:  [  5] 180.00-210.00 sec   237 MBytes  66.2 Mbits/sec  0.174 ms  365572/546566 (67%)
UDP DL MTU1400:  [  5] 210.00-240.00 sec   255 MBytes  71.3 Mbits/sec  0.344 ms  352062/546982 (64%)
UDP DL MTU1400:  [  5] 240.00-270.00 sec   253 MBytes  70.8 Mbits/sec  0.162 ms  353495/546931 (65%)
UDP DL MTU1400:  [  5] 270.00-300.00 sec   257 MBytes  71.9 Mbits/sec  0.187 ms  349793/546341 (64%)
UDP DL MTU1400:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1400:  [  5]   0.00-300.44 sec  7.00 GBytes   200 Mbits/sec  0.000 ms  0/5474548 (0%)  sender
UDP DL MTU1400:  [SUM]  0.0-300.4 sec  693 datagrams received out-of-order
UDP DL MTU1400:  [  5]   0.00-300.00 sec  2.45 GBytes  70.1 Mbits/sec  0.187 ms  3547244/5464532 (65%)  receiver
UDP DL MTU1400:
UDP DL MTU1400:  iperf Done.
+ set +x
==============


MTU: 1440
+ iperf3 -c 203.0.113.2 -t 300 -l 1412 -i 30 -T 'UDP DL MTU1440' -u -b 200M -R
warning: UDP block size 1412 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1440:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1440:  Reverse mode, remote host 203.0.113.2 is sending
UDP DL MTU1440:  [  5] local 192.168.13.81 port 53983 connected to 203.0.113.2 port 5201
UDP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1440:  [  5]   0.00-30.00  sec   259 MBytes  72.5 Mbits/sec  0.215 ms  343787/536310 (64%)
UDP DL MTU1440:  [  5]  30.00-60.00  sec   280 MBytes  78.3 Mbits/sec  0.123 ms  324047/531888 (61%)
UDP DL MTU1440:  [  5]  60.00-90.00  sec   296 MBytes  82.7 Mbits/sec  0.133 ms  311100/530801 (59%)
UDP DL MTU1440:  [  5]  90.00-120.00 sec   178 MBytes  49.7 Mbits/sec  0.482 ms  399032/530952 (75%)
UDP DL MTU1440:  [  5] 120.00-150.00 sec   185 MBytes  51.8 Mbits/sec  0.303 ms  393039/530735 (74%)
UDP DL MTU1440:  [  5] 150.00-180.00 sec   281 MBytes  78.6 Mbits/sec  0.160 ms  322936/531694 (61%)
UDP DL MTU1440:  [  5] 180.00-210.00 sec   291 MBytes  81.4 Mbits/sec  0.184 ms  315097/531301 (59%)
UDP DL MTU1440:  [  5] 210.00-240.00 sec   285 MBytes  79.7 Mbits/sec  0.205 ms  319969/531587 (60%)
UDP DL MTU1440:  [  5] 240.00-270.00 sec   282 MBytes  78.8 Mbits/sec  0.478 ms  321341/530615 (61%)
UDP DL MTU1440:  [  5] 270.00-300.00 sec   299 MBytes  83.5 Mbits/sec  0.394 ms  309457/531230 (58%)
UDP DL MTU1440:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1440:  [  5]   0.00-300.86 sec  7.00 GBytes   200 Mbits/sec  0.000 ms  0/5326845 (0%)  sender
UDP DL MTU1440:  [SUM]  0.0-300.9 sec  787 datagrams received out-of-order
UDP DL MTU1440:  [  5]   0.00-300.00 sec  2.57 GBytes  73.7 Mbits/sec  0.394 ms  3359805/5317113 (63%)  receiver
UDP DL MTU1440:
UDP DL MTU1440:  iperf Done.
+ set +x
==============


MTU: 1500
+ iperf3 -c 203.0.113.2 -t 300 -l 1472 -i 30 -T 'UDP DL MTU1500' -u -b 200M -R
warning: UDP block size 1472 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1500:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1500:  Reverse mode, remote host 203.0.113.2 is sending
UDP DL MTU1500:  [  5] local 192.168.13.81 port 54263 connected to 203.0.113.2 port 5201
UDP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1500:  [  5]   0.00-30.00  sec   285 MBytes  79.7 Mbits/sec  0.101 ms  302565/505716 (60%)
UDP DL MTU1500:  [  5]  30.00-60.00  sec   283 MBytes  79.1 Mbits/sec  0.168 ms  305646/507133 (60%)
UDP DL MTU1500:  [  5]  60.00-90.00  sec   245 MBytes  68.5 Mbits/sec  3.403 ms  336089/510670 (66%)
UDP DL MTU1500:  [  5]  90.00-120.00 sec   275 MBytes  76.9 Mbits/sec  0.243 ms  313523/509479 (62%)
UDP DL MTU1500:  [  5] 120.00-150.00 sec   255 MBytes  71.3 Mbits/sec  0.462 ms  328733/510411 (64%)
UDP DL MTU1500:  [  5] 150.00-180.00 sec   257 MBytes  72.0 Mbits/sec  0.183 ms  325443/508748 (64%)
UDP DL MTU1500:  [  5] 180.00-210.00 sec   255 MBytes  71.4 Mbits/sec  0.192 ms  326095/507901 (64%)
UDP DL MTU1500:  [  5] 210.00-240.00 sec   275 MBytes  77.0 Mbits/sec  0.220 ms  315217/511260 (62%)
UDP DL MTU1500:  [  5] 240.00-270.00 sec   256 MBytes  71.7 Mbits/sec  0.267 ms  326772/509463 (64%)
UDP DL MTU1500:  [  5] 270.00-300.00 sec   256 MBytes  71.4 Mbits/sec  0.192 ms  326556/508568 (64%)
UDP DL MTU1500:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1500:  [  5]   0.00-300.25 sec  6.99 GBytes   200 Mbits/sec  0.000 ms  0/5099343 (0%)  sender
UDP DL MTU1500:  [SUM]  0.0-300.2 sec  389 datagrams received out-of-order
UDP DL MTU1500:  [  5]   0.00-300.00 sec  2.58 GBytes  73.9 Mbits/sec  0.192 ms  3206639/5089349 (63%)  receiver
UDP DL MTU1500:
UDP DL MTU1500:  iperf Done.
+ set +x
==============

Upload TCP

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for i in 1280 1360 1400 1440 1500
do
  echo -e "MTU: ${i}\n\n"
  set -x
  iperf3 -c 203.0.113.2 -t 300 -l $(( ${i} - 40 )) -i 30 -T "TCP DL MTU${i}"
  set +x
  echo -e "==============\n\n"
done

MTU: 1280
+ iperf3 -c 203.0.113.2 -t 300 -l 1240 -i 30 -T 'TCP DL MTU1280'
TCP DL MTU1280:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1280:  [  5] local 192.168.13.81 port 50310 connected to 203.0.113.2 port 5201
TCP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
TCP DL MTU1280:  [  5]   0.00-30.00  sec   143 MBytes  40.0 Mbits/sec  221    296 KBytes
TCP DL MTU1280:  [  5]  30.00-60.00  sec   147 MBytes  41.0 Mbits/sec  119    346 KBytes
TCP DL MTU1280:  [  5]  60.00-90.00  sec   152 MBytes  42.4 Mbits/sec   64    855 KBytes
TCP DL MTU1280:  [  5]  90.00-120.00 sec   149 MBytes  41.6 Mbits/sec  274    506 KBytes
TCP DL MTU1280:  [  5] 120.00-150.00 sec   152 MBytes  42.5 Mbits/sec   76    872 KBytes
TCP DL MTU1280:  [  5] 150.00-180.00 sec   145 MBytes  40.5 Mbits/sec  325    319 KBytes
TCP DL MTU1280:  [  5] 180.00-210.00 sec   145 MBytes  40.6 Mbits/sec  232    930 KBytes
TCP DL MTU1280:  [  5] 210.00-240.00 sec   147 MBytes  41.0 Mbits/sec  193    626 KBytes
TCP DL MTU1280:  [  5] 240.00-270.00 sec   146 MBytes  40.8 Mbits/sec  197    331 KBytes
TCP DL MTU1280:  [  5] 270.00-300.00 sec   147 MBytes  41.2 Mbits/sec   58   1015 KBytes
TCP DL MTU1280:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1280:  [  5]   0.00-300.00 sec  1.44 GBytes  41.2 Mbits/sec  1759             sender
TCP DL MTU1280:  [  5]   0.00-300.21 sec  1.44 GBytes  41.1 Mbits/sec                  receiver
TCP DL MTU1280:
TCP DL MTU1280:  iperf Done.
+ set +x
==============


MTU: 1360
+ iperf3 -c 203.0.113.2 -t 300 -l 1320 -i 30 -T 'TCP DL MTU1360'
TCP DL MTU1360:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1360:  [  5] local 192.168.13.81 port 42584 connected to 203.0.113.2 port 5201
TCP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
TCP DL MTU1360:  [  5]   0.00-30.00  sec   142 MBytes  39.7 Mbits/sec  167    392 KBytes
TCP DL MTU1360:  [  5]  30.00-60.00  sec   153 MBytes  42.7 Mbits/sec  331    286 KBytes
TCP DL MTU1360:  [  5]  60.00-90.00  sec   113 MBytes  31.6 Mbits/sec   93    763 KBytes
TCP DL MTU1360:  [  5]  90.00-120.00 sec   112 MBytes  31.3 Mbits/sec   73    816 KBytes
TCP DL MTU1360:  [  5] 120.00-150.00 sec   141 MBytes  39.4 Mbits/sec   70    699 KBytes
TCP DL MTU1360:  [  5] 150.00-180.00 sec   146 MBytes  40.7 Mbits/sec   82    653 KBytes
TCP DL MTU1360:  [  5] 180.00-210.00 sec   145 MBytes  40.5 Mbits/sec  223    421 KBytes
TCP DL MTU1360:  [  5] 210.00-240.00 sec   118 MBytes  32.9 Mbits/sec   54    874 KBytes
TCP DL MTU1360:  [  5] 240.00-270.00 sec   106 MBytes  29.6 Mbits/sec   33    724 KBytes
TCP DL MTU1360:  [  5] 270.00-300.00 sec   113 MBytes  31.6 Mbits/sec  332    854 KBytes
TCP DL MTU1360:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1360:  [  5]   0.00-300.00 sec  1.26 GBytes  36.0 Mbits/sec  1458             sender
TCP DL MTU1360:  [  5]   0.00-300.26 sec  1.26 GBytes  35.9 Mbits/sec                  receiver
TCP DL MTU1360:
TCP DL MTU1360:  iperf Done.
+ set +x
==============


MTU: 1400
+ iperf3 -c 203.0.113.2 -t 300 -l 1360 -i 30 -T 'TCP DL MTU1400'
TCP DL MTU1400:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1400:  [  5] local 192.168.13.81 port 37206 connected to 203.0.113.2 port 5201
TCP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
TCP DL MTU1400:  [  5]   0.00-30.00  sec   140 MBytes  39.1 Mbits/sec  104    604 KBytes
TCP DL MTU1400:  [  5]  30.00-60.00  sec   145 MBytes  40.7 Mbits/sec  150    989 KBytes
TCP DL MTU1400:  [  5]  60.00-90.00  sec   147 MBytes  41.2 Mbits/sec  276    504 KBytes
TCP DL MTU1400:  [  5]  90.00-120.00 sec   145 MBytes  40.6 Mbits/sec  157    931 KBytes
TCP DL MTU1400:  [  5] 120.00-150.00 sec   142 MBytes  39.6 Mbits/sec   99    972 KBytes
TCP DL MTU1400:  [  5] 150.00-180.00 sec   142 MBytes  39.8 Mbits/sec   60   1024 KBytes
TCP DL MTU1400:  [  5] 180.00-210.00 sec   143 MBytes  39.9 Mbits/sec   59    844 KBytes
TCP DL MTU1400:  [  5] 210.00-240.00 sec   142 MBytes  39.7 Mbits/sec   37   1.03 MBytes
TCP DL MTU1400:  [  5] 240.00-270.00 sec   144 MBytes  40.2 Mbits/sec  143    631 KBytes
TCP DL MTU1400:  [  5] 270.00-300.00 sec   142 MBytes  39.7 Mbits/sec  152    299 KBytes
TCP DL MTU1400:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1400:  [  5]   0.00-300.00 sec  1.40 GBytes  40.1 Mbits/sec  1237             sender
TCP DL MTU1400:  [  5]   0.00-300.05 sec  1.40 GBytes  40.0 Mbits/sec                  receiver
TCP DL MTU1400:
TCP DL MTU1400:  iperf Done.
+ set +x
==============


MTU: 1440
+ iperf3 -c 203.0.113.2 -t 300 -l 1400 -i 30 -T 'TCP DL MTU1440'
TCP DL MTU1440:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1440:  [  5] local 192.168.13.81 port 43296 connected to 203.0.113.2 port 5201
TCP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
TCP DL MTU1440:  [  5]   0.00-30.00  sec   130 MBytes  36.4 Mbits/sec   20    748 KBytes
TCP DL MTU1440:  [  5]  30.00-60.00  sec   152 MBytes  42.5 Mbits/sec  255    497 KBytes
TCP DL MTU1440:  [  5]  60.00-90.00  sec   146 MBytes  40.9 Mbits/sec  121    674 KBytes
TCP DL MTU1440:  [  5]  90.00-120.00 sec   149 MBytes  41.8 Mbits/sec  105    884 KBytes
TCP DL MTU1440:  [  5] 120.00-150.00 sec   146 MBytes  40.9 Mbits/sec  102    971 KBytes
TCP DL MTU1440:  [  5] 150.00-180.00 sec   147 MBytes  41.2 Mbits/sec  193    443 KBytes
TCP DL MTU1440:  [  5] 180.00-210.00 sec   151 MBytes  42.1 Mbits/sec   65    914 KBytes
TCP DL MTU1440:  [  5] 210.00-240.00 sec   148 MBytes  41.2 Mbits/sec  180    546 KBytes
TCP DL MTU1440:  [  5] 240.00-270.00 sec   149 MBytes  41.6 Mbits/sec  185    696 KBytes
TCP DL MTU1440:  [  5] 270.00-300.00 sec   149 MBytes  41.6 Mbits/sec  130    810 KBytes
TCP DL MTU1440:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1440:  [  5]   0.00-300.00 sec  1.43 GBytes  41.0 Mbits/sec  1356             sender
TCP DL MTU1440:  [  5]   0.00-300.16 sec  1.43 GBytes  41.0 Mbits/sec                  receiver
TCP DL MTU1440:
TCP DL MTU1440:  iperf Done.
+ set +x
==============


MTU: 1500
+ iperf3 -c 203.0.113.2 -t 300 -l 1460 -i 30 -T 'TCP DL MTU1500'
TCP DL MTU1500:  Connecting to host 203.0.113.2, port 5201
TCP DL MTU1500:  [  5] local 192.168.13.81 port 34908 connected to 203.0.113.2 port 5201
TCP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
TCP DL MTU1500:  [  5]   0.00-30.00  sec   147 MBytes  41.1 Mbits/sec  102    870 KBytes
TCP DL MTU1500:  [  5]  30.00-60.00  sec   153 MBytes  42.8 Mbits/sec  159    536 KBytes
TCP DL MTU1500:  [  5]  60.00-90.00  sec   149 MBytes  41.5 Mbits/sec  200    532 KBytes
TCP DL MTU1500:  [  5]  90.00-120.00 sec   152 MBytes  42.5 Mbits/sec  137    962 KBytes
TCP DL MTU1500:  [  5] 120.00-150.00 sec   147 MBytes  41.1 Mbits/sec  146   1.02 MBytes
TCP DL MTU1500:  [  5] 150.00-180.00 sec   149 MBytes  41.6 Mbits/sec  479    405 KBytes
TCP DL MTU1500:  [  5] 180.00-210.00 sec   150 MBytes  42.1 Mbits/sec  332    516 KBytes
TCP DL MTU1500:  [  5] 210.00-240.00 sec   150 MBytes  41.8 Mbits/sec  117    924 KBytes
TCP DL MTU1500:  [  5] 240.00-270.00 sec   152 MBytes  42.6 Mbits/sec  170    811 KBytes
TCP DL MTU1500:  [  5] 270.00-300.00 sec   150 MBytes  41.8 Mbits/sec  259    643 KBytes
TCP DL MTU1500:  - - - - - - - - - - - - - - - - - - - - - - - - -
TCP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Retr
TCP DL MTU1500:  [  5]   0.00-300.00 sec  1.46 GBytes  41.9 Mbits/sec  2101             sender
TCP DL MTU1500:  [  5]   0.00-300.09 sec  1.46 GBytes  41.9 Mbits/sec                  receiver
TCP DL MTU1500:
TCP DL MTU1500:  iperf Done.
+ set +x
==============

Upload UDP

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for i in 1280 1360 1400 1440 1500
do
  echo -e "MTU: ${i}\n\n"
  set -x
  iperf3 -c 203.0.113.2 -t 300 -l $(( ${i} - 28 )) -i 30 -T "UDP DL MTU${i}" -u -b 200M
  set +x
  echo -e "==============\n\n"
done

MTU: 1280
+ iperf3 -c 203.0.113.2 -t 300 -l 1252 -i 30 -T 'UDP DL MTU1280' -u -b 200M
UDP DL MTU1280:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1280:  [  5] local 192.168.13.81 port 60795 connected to 203.0.113.2 port 5201
UDP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Total Datagrams
UDP DL MTU1280:  [  5]   0.00-30.00  sec   715 MBytes   200 Mbits/sec  599027
UDP DL MTU1280:  [  5]  30.00-60.00  sec   715 MBytes   200 Mbits/sec  599042
UDP DL MTU1280:  [  5]  60.00-90.00  sec   715 MBytes   200 Mbits/sec  599040
UDP DL MTU1280:  [  5]  90.00-120.00 sec   715 MBytes   200 Mbits/sec  599048
UDP DL MTU1280:  [  5] 120.00-150.00 sec   715 MBytes   200 Mbits/sec  599036
UDP DL MTU1280:  [  5] 150.00-180.00 sec   715 MBytes   200 Mbits/sec  599044
UDP DL MTU1280:  [  5] 180.00-210.00 sec   715 MBytes   200 Mbits/sec  599038
UDP DL MTU1280:  [  5] 210.00-240.00 sec   715 MBytes   200 Mbits/sec  599044
UDP DL MTU1280:  [  5] 240.00-270.00 sec   715 MBytes   200 Mbits/sec  599042
UDP DL MTU1280:  [  5] 270.00-300.00 sec   715 MBytes   200 Mbits/sec  599043
UDP DL MTU1280:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1280:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1280:  [  5]   0.00-300.00 sec  6.98 GBytes   200 Mbits/sec  0.000 ms  0/5990404 (0%)  sender
UDP DL MTU1280:  [  5]   0.00-300.28 sec  1.21 GBytes  34.6 Mbits/sec  0.233 ms  4954485/5990391 (83%)  receiver
UDP DL MTU1280:
UDP DL MTU1280:  iperf Done.
+ set +x
==============


MTU: 1360
+ iperf3 -c 203.0.113.2 -t 300 -l 1332 -i 30 -T 'UDP DL MTU1360' -u -b 200M
UDP DL MTU1360:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1360:  [  5] local 192.168.13.81 port 47696 connected to 203.0.113.2 port 5201
UDP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Total Datagrams
UDP DL MTU1360:  [  5]   0.00-30.00  sec   715 MBytes   200 Mbits/sec  563049
UDP DL MTU1360:  [  5]  30.00-60.00  sec   715 MBytes   200 Mbits/sec  563064
UDP DL MTU1360:  [  5]  60.00-90.00  sec   715 MBytes   200 Mbits/sec  563063
UDP DL MTU1360:  [  5]  90.00-120.00 sec   715 MBytes   200 Mbits/sec  563063
UDP DL MTU1360:  [  5] 120.00-150.00 sec   715 MBytes   200 Mbits/sec  563063
UDP DL MTU1360:  [  5] 150.00-180.00 sec   715 MBytes   200 Mbits/sec  563063
UDP DL MTU1360:  [  5] 180.00-210.00 sec   715 MBytes   200 Mbits/sec  563065
UDP DL MTU1360:  [  5] 210.00-240.00 sec   715 MBytes   200 Mbits/sec  563061
UDP DL MTU1360:  [  5] 240.00-270.00 sec   715 MBytes   200 Mbits/sec  563064
UDP DL MTU1360:  [  5] 270.00-300.00 sec   715 MBytes   200 Mbits/sec  563062
UDP DL MTU1360:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1360:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1360:  [  5]   0.00-300.00 sec  6.98 GBytes   200 Mbits/sec  0.000 ms  0/5630617 (0%)  sender
UDP DL MTU1360:  [  5]   0.00-300.27 sec  1.24 GBytes  35.5 Mbits/sec  0.403 ms  4629301/5630605 (82%)  receiver
UDP DL MTU1360:
UDP DL MTU1360:  iperf Done.
+ set +x
==============


MTU: 1400
+ iperf3 -c 203.0.113.2 -t 300 -l 1372 -i 30 -T 'UDP DL MTU1400' -u -b 200M
UDP DL MTU1400:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1400:  [  5] local 192.168.13.81 port 38793 connected to 203.0.113.2 port 5201
UDP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Total Datagrams
UDP DL MTU1400:  [  5]   0.00-30.00  sec   715 MBytes   200 Mbits/sec  546634
UDP DL MTU1400:  [  5]  30.00-60.00  sec   715 MBytes   200 Mbits/sec  546647
UDP DL MTU1400:  [  5]  60.00-90.00  sec   715 MBytes   200 Mbits/sec  546647
UDP DL MTU1400:  [  5]  90.00-120.00 sec   715 MBytes   200 Mbits/sec  546647
UDP DL MTU1400:  [  5] 120.00-150.00 sec   715 MBytes   200 Mbits/sec  546646
UDP DL MTU1400:  [  5] 150.00-180.00 sec   715 MBytes   200 Mbits/sec  546655
UDP DL MTU1400:  [  5] 180.00-210.00 sec   715 MBytes   200 Mbits/sec  546643
UDP DL MTU1400:  [  5] 210.00-240.00 sec   715 MBytes   200 Mbits/sec  546645
UDP DL MTU1400:  [  5] 240.00-270.00 sec   715 MBytes   200 Mbits/sec  546647
UDP DL MTU1400:  [  5] 270.00-300.00 sec   715 MBytes   200 Mbits/sec  546649
UDP DL MTU1400:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1400:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1400:  [  5]   0.00-300.00 sec  6.98 GBytes   200 Mbits/sec  0.000 ms  0/5466460 (0%)  sender
UDP DL MTU1400:  [  5]   0.00-300.23 sec  1.55 GBytes  44.4 Mbits/sec  0.536 ms  4251403/5466427 (78%)  receiver
UDP DL MTU1400:
UDP DL MTU1400:  iperf Done.
+ set +x
==============


MTU: 1440
+ iperf3 -c 203.0.113.2 -t 300 -l 1412 -i 30 -T 'UDP DL MTU1440' -u -b 200M
warning: UDP block size 1412 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1440:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1440:  [  5] local 192.168.13.81 port 40521 connected to 203.0.113.2 port 5201
UDP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Total Datagrams
UDP DL MTU1440:  [  5]   0.00-30.00  sec   715 MBytes   200 Mbits/sec  531148
UDP DL MTU1440:  [  5]  30.00-60.00  sec   715 MBytes   200 Mbits/sec  531165
UDP DL MTU1440:  [  5]  60.00-90.00  sec   715 MBytes   200 Mbits/sec  531157
UDP DL MTU1440:  [  5]  90.00-120.00 sec   715 MBytes   200 Mbits/sec  531163
UDP DL MTU1440:  [  5] 120.00-150.00 sec   715 MBytes   200 Mbits/sec  531161
UDP DL MTU1440:  [  5] 150.00-180.00 sec   715 MBytes   200 Mbits/sec  531162
UDP DL MTU1440:  [  5] 180.00-210.00 sec   715 MBytes   200 Mbits/sec  531163
UDP DL MTU1440:  [  5] 210.00-240.00 sec   715 MBytes   200 Mbits/sec  531160
UDP DL MTU1440:  [  5] 240.00-270.00 sec   715 MBytes   200 Mbits/sec  531161
UDP DL MTU1440:  [  5] 270.00-300.00 sec   715 MBytes   200 Mbits/sec  531162
UDP DL MTU1440:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1440:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1440:  [  5]   0.00-300.00 sec  6.98 GBytes   200 Mbits/sec  0.000 ms  0/5311602 (0%)  sender
UDP DL MTU1440:  [  5]   0.00-300.30 sec  1.53 GBytes  43.8 Mbits/sec  0.442 ms  4146642/5311600 (78%)  receiver
UDP DL MTU1440:
UDP DL MTU1440:  iperf Done.
+ set +x
==============


MTU: 1500
+ iperf3 -c 203.0.113.2 -t 300 -l 1472 -i 30 -T 'UDP DL MTU1500' -u -b 200M
warning: UDP block size 1472 exceeds TCP MSS 1288, may result in fragmentation / drops
UDP DL MTU1500:  Connecting to host 203.0.113.2, port 5201
UDP DL MTU1500:  [  5] local 192.168.13.81 port 36687 connected to 203.0.113.2 port 5201
UDP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Total Datagrams
UDP DL MTU1500:  [  5]   0.00-30.00  sec   715 MBytes   200 Mbits/sec  509499
UDP DL MTU1500:  [  5]  30.00-60.00  sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5]  60.00-90.00  sec   715 MBytes   200 Mbits/sec  509510
UDP DL MTU1500:  [  5]  90.00-120.00 sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5] 120.00-150.00 sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5] 150.00-180.00 sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5] 180.00-210.00 sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5] 210.00-240.00 sec   715 MBytes   200 Mbits/sec  509511
UDP DL MTU1500:  [  5] 240.00-270.00 sec   715 MBytes   200 Mbits/sec  509514
UDP DL MTU1500:  [  5] 270.00-300.00 sec   715 MBytes   200 Mbits/sec  509507
UDP DL MTU1500:  - - - - - - - - - - - - - - - - - - - - - - - - -
UDP DL MTU1500:  [ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
UDP DL MTU1500:  [  5]   0.00-300.00 sec  6.98 GBytes   200 Mbits/sec  0.000 ms  0/5095096 (0%)  sender
UDP DL MTU1500:  [  5]   0.00-300.08 sec   423 MBytes  11.8 Mbits/sec  1447.272 ms  4772723/5074181 (94%)  receiver
UDP DL MTU1500:
UDP DL MTU1500:  iperf Done.
+ set +x
==============