0

I'm trying to use Raspberry Pi as a WiFi repeater, but routing speed is extremely slow. I've configured hostapd to work on wlan0 (onboard WiFi adapter) and wpa_supplicant on wlan1 (external adapter). Everything works fine except the speed. Home router provides internet about 80-90 Mbit/s, but connected devices receive only 5-15 Mbit/s.

The strange thing is that speedtest running on raspberry gives 80-90 Mbit/s.

What i've tried:

  1. Different external adapters - did not help.
  2. If i receive internet from ethernet cable i have about 40-50 Mbit/s, so seems that the onboard adapter is not a bottleneck.
  3. If i run hostapd on external adapter and receive with onboard one - same problem.
  4. I tried to run hostapd and wpa_supplicant on 2 external adapters - same problem.
  5. I tried different distributives (raspbian, ubuntu)
  6. I tried different boards (rpi b+, rpi b v1.2).
  7. Tried to experiment with wifi bands (receive on channel 1, share on channel 11) - no result.
  8. Tried to change device orientation (according to this answer RPI wifi repeater - slow internet speed)
  9. CPU loading in all tests is about 10% [Updated].

So seems that the problem is in forwarding soft inside the OS. Can anyone help me?

Improve this question
10
  • 1
    Does this answer your question? Low wifi speed even with 5Ghz wifi adapter. I seriously doubt you can get 80-90 Mbps on a Pi 3, AFAIK it's capped to around 36 Mbps even with a single adapter. And the load will be much higher than 1-2% for sure, especially if you do routing.
    – Dmitry Grigoryev
    Aug 13, 2021 at 9:54
  • 2
    If I had a router that provided 80-90 m(illi)bit/s I would replace it with a piece of wet string.
    – Milliways
    Aug 13, 2021 at 10:59
  • 1
    @DmitryGrigoryev I've checked wifi speed just now on builtin adapter - 80-90 mbit/s. CPU load is about 10%, made a mistake in the topic. By forwarding i meant routing between 2 wlan interfaces, my mistake.
    – Vlad Kudoyar
    Aug 13, 2021 at 12:01
  • 1
    iptables -t nat -I POSTROUTING -o wlan1 -j MASQUERADE Routing table is configured automatically with wpa_supplicant
    – Vlad Kudoyar
    Aug 13, 2021 at 12:23
  • 1
    Comments are not for extended discussion; this conversation has been moved to chat.
    – goldilocks ♦
    Aug 13, 2021 at 14:14

0

Reset to default

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Browse other questions tagged or ask your own question.