Tailscale iperf3-Ergebnisse: VM und Bare-Metal-Desktop in einem geswitchten Netzwerk

Wir haben die iperf3-Performance in unserem Netzwerk getestet, das auf den folgenden Geräten basiert:

Desktop: Ubuntu 21.10 i7-6700 CPU @ 3.40 GHz, verbunden per 1Gbase-T mit
Desktop-Switch: Mikrotik CSS610-8G-2S+IN, verbunden per 10GBase-T Multimode-SFP+-Modul mit:
Core-Switch: Mikrotik CRS309-1G-8S+IN, verbunden per 10GBase-T-DAC-Kabel mit
Virtualisierungsserver: i5-6500 CPU @ 3.20GHz mit XCP-NG 8.2.1
Virtuelle Maschine: Ubuntu 20.04, 4 Kerne, 8 GB RAM

Die Tailscale-Version war

tailscale_iperf_results.txt

1.24.1
  tailscale commit: 1a9302b1edba91d0f638e775faeaa0ce2a6a25f8
  other commit: 1331ed5836e1a0ab32b10e6ce8748e17ba2c7598
  go version: go1.18.1-ts710a0d8610

1.24.1
  tailscale commit: 1a9302b1edba91d0f638e775faeaa0ce2a6a25f8
  other commit: 1331ed5836e1a0ab32b10e6ce8748e17ba2c7598
  go version: go1.18.1-ts710a0d8610

Das Netzwerk ist vollständig geswitcht, nicht geroutet und wir haben sichergestellt, dass Tailscale tatsächlich die geswitchte Verbindung nutzt, mittels tailscale ping.

Test 0: Direkte Verbindung über geswitchtes Netzwerk

Desktop führt iperf -s aus, VM führt iperf -c 10.9.2.10 aus:

iperf_direct_desktop_to_vm.txt

Connecting to host 10.9.2.10, port 5201
[  5] local 10.9.2.103 port 52944 connected to 10.9.2.10 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  94.7 MBytes   794 Mbits/sec  338    109 KBytes
[  5]   1.00-2.00   sec  98.0 MBytes   822 Mbits/sec  353    148 KBytes
[  5]   2.00-3.00   sec  96.6 MBytes   811 Mbits/sec  382    117 KBytes
[  5]   3.00-4.00   sec   103 MBytes   862 Mbits/sec  334    116 KBytes
[  5]   4.00-5.00   sec   101 MBytes   851 Mbits/sec  483    102 KBytes
[  5]   5.00-6.00   sec   104 MBytes   874 Mbits/sec  503    126 KBytes
[  5]   6.00-7.00   sec   105 MBytes   883 Mbits/sec  527    119 KBytes
[  5]   7.00-8.00   sec   108 MBytes   906 Mbits/sec  451    105 KBytes
[  5]   8.00-9.00   sec   108 MBytes   903 Mbits/sec  442    117 KBytes
[  5]   9.00-10.00  sec   107 MBytes   900 Mbits/sec  461    123 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.00 GBytes   861 Mbits/sec  4274             sender
[  5]   0.00-10.00  sec  1.00 GBytes   860 Mbits/sec                  receiver

iperf Done.

Connecting to host 10.9.2.10, port 5201
[  5] local 10.9.2.103 port 52944 connected to 10.9.2.10 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  94.7 MBytes   794 Mbits/sec  338    109 KBytes
[  5]   1.00-2.00   sec  98.0 MBytes   822 Mbits/sec  353    148 KBytes
[  5]   2.00-3.00   sec  96.6 MBytes   811 Mbits/sec  382    117 KBytes
[  5]   3.00-4.00   sec   103 MBytes   862 Mbits/sec  334    116 KBytes
[  5]   4.00-5.00   sec   101 MBytes   851 Mbits/sec  483    102 KBytes
[  5]   5.00-6.00   sec   104 MBytes   874 Mbits/sec  503    126 KBytes
[  5]   6.00-7.00   sec   105 MBytes   883 Mbits/sec  527    119 KBytes
[  5]   7.00-8.00   sec   108 MBytes   906 Mbits/sec  451    105 KBytes
[  5]   8.00-9.00   sec   108 MBytes   903 Mbits/sec  442    117 KBytes
[  5]   9.00-10.00  sec   107 MBytes   900 Mbits/sec  461    123 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.00 GBytes   861 Mbits/sec  4274             sender
[  5]   0.00-10.00  sec  1.00 GBytes   860 Mbits/sec                  receiver

iperf Done.

VM führt iperf -s aus, Desktop führt iperf -c 10.9.2.103 aus

iperf_direct_vm_to_desktop.txt

Connecting to host 10.9.2.103, port 5201
[  5] local 10.9.2.10 port 42630 connected to 10.9.2.103 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  88.5 MBytes   742 Mbits/sec    0    966 KBytes
[  5]   1.00-2.00   sec  90.0 MBytes   755 Mbits/sec    0   1.12 MBytes
[  5]   2.00-3.00   sec  87.5 MBytes   734 Mbits/sec   33    833 KBytes
[  5]   3.00-4.00   sec  90.0 MBytes   755 Mbits/sec    0    833 KBytes
[  5]   4.00-5.00   sec  88.8 MBytes   745 Mbits/sec    0   1.00 MBytes
[  5]   5.00-6.00   sec  88.8 MBytes   744 Mbits/sec    0   1.00 MBytes
[  5]   6.00-7.00   sec  87.5 MBytes   734 Mbits/sec    0   1.09 MBytes
[  5]   7.00-8.00   sec  90.0 MBytes   755 Mbits/sec    0   1.09 MBytes
[  5]   8.00-9.00   sec  90.0 MBytes   755 Mbits/sec    0   1.09 MBytes
[  5]   9.00-10.00  sec  90.0 MBytes   755 Mbits/sec   13    863 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   891 MBytes   747 Mbits/sec   46             sender
[  5]   0.00-10.00  sec   888 MBytes   745 Mbits/sec                  receiver

iperf Done.

Connecting to host 10.9.2.103, port 5201
[  5] local 10.9.2.10 port 42630 connected to 10.9.2.103 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  88.5 MBytes   742 Mbits/sec    0    966 KBytes
[  5]   1.00-2.00   sec  90.0 MBytes   755 Mbits/sec    0   1.12 MBytes
[  5]   2.00-3.00   sec  87.5 MBytes   734 Mbits/sec   33    833 KBytes
[  5]   3.00-4.00   sec  90.0 MBytes   755 Mbits/sec    0    833 KBytes
[  5]   4.00-5.00   sec  88.8 MBytes   745 Mbits/sec    0   1.00 MBytes
[  5]   5.00-6.00   sec  88.8 MBytes   744 Mbits/sec    0   1.00 MBytes
[  5]   6.00-7.00   sec  87.5 MBytes   734 Mbits/sec    0   1.09 MBytes
[  5]   7.00-8.00   sec  90.0 MBytes   755 Mbits/sec    0   1.09 MBytes
[  5]   8.00-9.00   sec  90.0 MBytes   755 Mbits/sec    0   1.09 MBytes
[  5]   9.00-10.00  sec  90.0 MBytes   755 Mbits/sec   13    863 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   891 MBytes   747 Mbits/sec   46             sender
[  5]   0.00-10.00  sec   888 MBytes   745 Mbits/sec                  receiver

iperf Done.

In der Richtung, in der die VM den iperf -s-Server hostet, also die Daten sendet, zeigt sich ein leichter Performance-Rückgang.

Test 1: Desktop führt `iperf -s` aus, VM führt `iperf -c` aus

iperf_tailscale_desktop_to_vm.txt

Connecting to host 100.64.0.2, port 5201
[  5] local 100.64.0.3 port 37466 connected to 100.64.0.2 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  39.4 MBytes   330 Mbits/sec   62    149 KBytes
[  5]   1.00-2.00   sec  45.8 MBytes   385 Mbits/sec   44    150 KBytes
[  5]   2.00-3.00   sec  38.9 MBytes   326 Mbits/sec   97    122 KBytes
[  5]   3.00-4.00   sec  47.9 MBytes   401 Mbits/sec    7    242 KBytes
[  5]   4.00-5.00   sec  39.5 MBytes   332 Mbits/sec  118    110 KBytes
[  5]   5.00-6.00   sec  46.6 MBytes   391 Mbits/sec   32    136 KBytes
[  5]   6.00-7.00   sec  41.8 MBytes   351 Mbits/sec   42    159 KBytes
[  5]   7.00-8.00   sec  44.3 MBytes   372 Mbits/sec   91    104 KBytes
[  5]   8.00-9.00   sec  36.1 MBytes   303 Mbits/sec   72    133 KBytes
[  5]   9.00-10.00  sec  41.5 MBytes   348 Mbits/sec   39    139 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   422 MBytes   354 Mbits/sec  604             sender
[  5]   0.00-10.00  sec   421 MBytes   353 Mbits/sec                  receiver

iperf Done.

Connecting to host 100.64.0.2, port 5201
[  5] local 100.64.0.3 port 37466 connected to 100.64.0.2 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  39.4 MBytes   330 Mbits/sec   62    149 KBytes
[  5]   1.00-2.00   sec  45.8 MBytes   385 Mbits/sec   44    150 KBytes
[  5]   2.00-3.00   sec  38.9 MBytes   326 Mbits/sec   97    122 KBytes
[  5]   3.00-4.00   sec  47.9 MBytes   401 Mbits/sec    7    242 KBytes
[  5]   4.00-5.00   sec  39.5 MBytes   332 Mbits/sec  118    110 KBytes
[  5]   5.00-6.00   sec  46.6 MBytes   391 Mbits/sec   32    136 KBytes
[  5]   6.00-7.00   sec  41.8 MBytes   351 Mbits/sec   42    159 KBytes
[  5]   7.00-8.00   sec  44.3 MBytes   372 Mbits/sec   91    104 KBytes
[  5]   8.00-9.00   sec  36.1 MBytes   303 Mbits/sec   72    133 KBytes
[  5]   9.00-10.00  sec  41.5 MBytes   348 Mbits/sec   39    139 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   422 MBytes   354 Mbits/sec  604             sender
[  5]   0.00-10.00  sec   421 MBytes   353 Mbits/sec                  receiver

iperf Done.

Test 2: VM führt `iperf -s` aus, Desktop führt `iperf -c` aus

iperf_tailscale_vm_to_desktop.txt

Connecting to host 100.64.0.3, port 5201
[  5] local 100.64.0.2 port 36744 connected to 100.64.0.3 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  23.7 MBytes   199 Mbits/sec  104   89.9 KBytes
[  5]   1.00-2.00   sec  23.6 MBytes   198 Mbits/sec   80   49.2 KBytes
[  5]   2.00-3.00   sec  21.1 MBytes   177 Mbits/sec   59   54.0 KBytes
[  5]   3.00-4.00   sec  23.6 MBytes   198 Mbits/sec   68   69.6 KBytes
[  5]   4.00-5.00   sec  19.1 MBytes   160 Mbits/sec   77   48.0 KBytes
[  5]   5.00-6.00   sec  25.3 MBytes   212 Mbits/sec   76   62.4 KBytes
[  5]   6.00-7.00   sec  21.4 MBytes   179 Mbits/sec   50    107 KBytes
[  5]   7.00-8.00   sec  25.6 MBytes   215 Mbits/sec   35    124 KBytes
[  5]   8.00-9.00   sec  22.5 MBytes   188 Mbits/sec   71   48.0 KBytes
[  5]   9.00-10.00  sec  25.0 MBytes   209 Mbits/sec   42   64.8 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   231 MBytes   194 Mbits/sec  662             sender
[  5]   0.00-10.01  sec   230 MBytes   193 Mbits/sec                  receiver

Connecting to host 100.64.0.3, port 5201
[  5] local 100.64.0.2 port 36744 connected to 100.64.0.3 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  23.7 MBytes   199 Mbits/sec  104   89.9 KBytes
[  5]   1.00-2.00   sec  23.6 MBytes   198 Mbits/sec   80   49.2 KBytes
[  5]   2.00-3.00   sec  21.1 MBytes   177 Mbits/sec   59   54.0 KBytes
[  5]   3.00-4.00   sec  23.6 MBytes   198 Mbits/sec   68   69.6 KBytes
[  5]   4.00-5.00   sec  19.1 MBytes   160 Mbits/sec   77   48.0 KBytes
[  5]   5.00-6.00   sec  25.3 MBytes   212 Mbits/sec   76   62.4 KBytes
[  5]   6.00-7.00   sec  21.4 MBytes   179 Mbits/sec   50    107 KBytes
[  5]   7.00-8.00   sec  25.6 MBytes   215 Mbits/sec   35    124 KBytes
[  5]   8.00-9.00   sec  22.5 MBytes   188 Mbits/sec   71   48.0 KBytes
[  5]   9.00-10.00  sec  25.0 MBytes   209 Mbits/sec   42   64.8 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   231 MBytes   194 Mbits/sec  662             sender
[  5]   0.00-10.01  sec   230 MBytes   193 Mbits/sec                  receiver

UDP-Tests

Die UDP-Tests waren weitgehend ähnlich zu den TCP-Tests (wenn auch mit leicht höherem Durchsatz von bis zu 400 Mbit/s), einschließlich der Empfindlichkeit bezüglich der Verbindungsrichtung.

Interpretation der Ergebnisse

Tailscale hat erheblichen Einfluss auf die Netzwerkgeschwindigkeit und wird bei typischen Setups mit einigen Jahre alten Desktops und virtuellen Maschinen regelmäßig keine iperf3-Geschwindigkeiten nahe einem Gigabit erreichen. Ein Durchsatz von 200–400 Mbit/s reicht jedoch für die meisten Anwendungen völlig aus.

Interessanterweise hängt die Geschwindigkeit stark von der Übertragungsrichtung zwischen einer weniger leistungsstarken VM und einem leistungsstärkeren Desktop ab, mit einem Faktor von x1,5 … x2 zwischen den beiden Richtungen. Dies lässt sich vermutlich auf den Rechenaufwand zurückführen, der zum Ver- bzw. Entschlüsseln der Daten erforderlich ist.

Check out similar posts by category: Networking

If this post helped you, please consider buying me a coffee or donating via PayPal to support research & publishing of new posts on TechOverflow

Buy me a coffee

Test 0: Direkte Verbindung über geswitchtes Netzwerk

Test 1: Desktop führt iperf -s aus, VM führt iperf -c aus

Test 2: VM führt iperf -s aus, Desktop führt iperf -c aus

UDP-Tests

Interpretation der Ergebnisse

Test 1: Desktop führt `iperf -s` aus, VM führt `iperf -c` aus

Test 2: VM führt `iperf -s` aus, Desktop führt `iperf -c` aus