I'm trying to setup upload traffic shaping in OPNsense, but am hitting a strange issue. The goal is to de-prioritize a network compared to another. I've setup the pipe, queues, and rules. I've setup an iperf3 server on a 3rd network to act as a test upload target.
When I have the pipe bandwidth at 50mbps, shaping works as expected. The low priority network gets ~8mbps and the high priority network gets ~40mbps as determined by the 2 queues I have with a weight of 1 for low, and 5 for high. When I set the bandwidth to 100mbps, my actual upload speed, the shaping dies and each host gets ~50mbps.
Bandwidth of 100mbps results in each host getting ~50mbps
(https://imgur.com/ggTMXRI.jpg)
Changing the bandwidth from 100 -> 50mbps and hitting apply, the rules start working immediately.
(https://imgur.com/o5cOMuM.jpg)
Pipe
(https://imgur.com/hCskYYT.jpg)
Queues
(https://imgur.com/iJbooyB.jpg)
(https://imgur.com/khAYNVu.jpg)
Rules
(https://imgur.com/e7fUoet.jpg)
(https://imgur.com/Huz18X3.jpg)
The shaper code in the OS was built in a time where 100 mbit was fast and for all speeds past 100 mbit the timekeeping will be off and increasingly unreliable. You can't even shape over 5 gbps because the variable being held is not able to store this value anymore because it doesn't have enough bits.
I haven't heard that someone wanted to change that.
Cheers,
Franco
Quote from: franco on March 01, 2023, 08:32:43 AM
The shaper code in the OS was built in a time where 100 mbit was fast and for all speeds past 100 mbit the timekeeping will be off and increasingly unreliable. You can't even shape over 5 gbps because the variable being held is not able to store this value anymore because it doesn't have enough bits.
I haven't heard that someone wanted to change that.
Cheers,
Franco
If I understand you correctly, this feature is basically not usable for faster links?
Yes, and shaping becomes less of a concern in these scenarios as well. At least that is what we are seeing with customers.
Cheers,
Franco
Alright, thanks for the information. I'll have to just give up on this in my situation.