Question
Is UDP connection capped at 1.05 Mbit/sec?
- Posted on March 10, 2023
- Infrastructure
Asked by cronchi
We tested transferring data to one of our servers via UDP and here is the result:
./iperf3 -c 206.189.127.20 --udp Connecting to host 206.189.127.20, port 5201 [ 4] local 10.14.19.8 port 52877 connected to 206.189.127.20 port 5201 [ ID] Interval Transfer Bandwidth Total Datagrams [ 4] 0.00-1.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 1.00-2.01 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 2.01-3.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 3.00-4.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 4.00-5.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 5.00-6.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 6.00-7.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 7.00-8.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 8.00-9.00 sec 128 KBytes 1.05 Mbits/sec 16 [ 4] 9.00-10.00 sec 128 KBytes 1.05 Mbits/sec 16
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 4] 0.00-10.00 sec 1.25 MBytes 1.05 Mbits/sec 59.160 ms 0/159 (0%)
Can someone help us make sense out of this? Same test done over TCP gives a speed of 170 Mbits/sec…
Thanks!
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Get our biweekly newsletter
Sign up for Infrastructure as a Newsletter.
Hollie's Hub for Good
Working on improving health and education, reducing inequality, and spurring economic growth? We'd like to help.
Become a contributor
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
Hey @cronchi,
That’s really strange, the only limits that should be exeprienced are here:
https://docs.digitalocean.com/products/droplets/details/limits/
Can you see if you are still experiencing this? Is it possible the cap is also coming from your network? I’ll still ask around to see if there is any UDP cap.
This comment has been deleted
The default
iperf3 -c hostname --udpis only capped to 1Mbps
if you want to test with more bandwidth, add
-b <bandwidth>argument to the commandiperf3 -c hostname --udp -b 100Mto test with 100Mbps Bandwidth