The best OpenWrt settings for the Xiaomi 4A Gigabit Router?

Installing and Using OpenWrt
23

Hard to get anything useful from pictures. You have to measure before and after each change, and always remember that you are working against very limited CPU.

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button (red circle; this works best in the 'Markdown' composer view in the blue oval):

Screenshot 2025-10-20 at 8.14.14 PM

Remember to redact passwords, VPN keys, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/system
cat /etc/config/dhcp
cat /etc/config/firewall
25

Please adjust formatting. It burns eyes.
You have to add and use br-wan.35 as a pppoe backend

26

I gave up now, I tried everything, it doesn't work, the best thing is to sell it and buy an AX3000T router.

27

which is a terrible pick, since you might end up with the unsupportable RD03v2 version of the AX3000T.

28

I can't get both download and performance at the same time on this device. I'll buy the supported version. You live in Türkiye. What are the details about this device?

29

no idea how that would make any difference.

30

"Alright, I understand what you're saying. So, what can you tell me about the device I currently have? Which settings do you recommend for the best possible performance?"

Ekran Resmi 2025-11-10 18.01.02
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Ekran Resmi 2025-11-10 18.01.06
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I currently have these 2 settings on

31

I'm not saying anything about your current device, I'm saying things about your future device.

32

Are the 2 settings on my current device good for the highest performance?

33

Cannot guess without you measuring.
sfo is 2-3x more throughput , if you get free cpu on top there is less latency and default fq_codel works
enabled-allcpu vs enabled has to be measured, secondary soft threads may or may not add performance.

34

By using all processors and enabling software offloading it achieves more speed, around 220 mbps, but the question is: will videos like TikTok live stream videos and YouTube experience lag and freezing issues with these 2 features turned on?

35

8k video is 100Mbps, 4k about 40Mbps. tiktok is 1k/fullhd/4Mbps maximum.
If you refuse to quantify user experience we are totally not in position to confirm or deny something works better or not.
2x 8k videos (you can force them on 4k screen/tv) will expose if you have any bottlenecks right away.

36

I understand what you said, I have only one more question. Will these two features cause any problems when they are open? Or will they complement each other?

37

They are completely independent. One gives double half-speed CPU cores, other uses half of CPU time to copy same packet.