Slow p2p work

Routers
1

Hello, I have two routers, Flint 3 and Flint 2, and both have an issue with slow performance in qBittorrent. Download and upload speeds stay around 500 Mbps, while my ISP provides 1 Gbps. If I switch from hardware acceleration to software mode, the speed in qBittorrent reaches the full tariff, but then all other devices on the network completely lose internet access. I tried checking with "top" via SSH, and there is no critical load on the router. I also tried fully disabling acceleration, but that didn’t help either: qBittorrent works at full speed, yet all other devices end up without internet.

I also have a Keenetic Sprinter, and it has no problems with torrents, even though its hardware is much weaker.

My hardware:

  1. PC - 2.5gb lan cable
  2. Flint 3 (firmware 4.8.1 default settings)

Screenshot_839

3

Its only internet or more?

You could try lowering the torrent speed, or use traffic limit inside the clients options or put a switch behind the client which does some QoS magic.

Then each client will have a more fair share, optionally you could install luci-app-qos and use it to lower speed on networks.

If more issues like losing local ip:

If this happens, can you check if wifi is still accessible?, and then do logread ?

My suspicion might be that you have somewhere a layer2 issue on the routing/or stp mixing going on.

Do you use network switches on other ports?

4

Hi

When qBittorrent consumes all available bandwidth, it’s expected that other devices may lose internet access or experience very slow speeds.

You can try installing SQM (Smart Queue Management) to see if it helps:
How to reduce bufferbloat with SQM on GL.iNet routers

Alternatively, you could limit qBittorrent maximum upload and download speeds to a more reasonable level.

If the problem is different—for example, if other devices are getting disconnected from the router (wired or wireless)—please provide us with logs after it happened.
So that we can further check.

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image1430×911 87 KB

5

I tried running a buffer test on Waveform and initially got an A+ grade. Then I installed SQM and the test showed an A grade. After that, I ran QBittorrent with SQM enabled and got about 1 MB upload speed. Im attaching the buffer test logs.

I have never limited torrent speeds on any other router, and when buying one of the best devices in terms of technical specifications, im not ready to accept such limitations.

As for the question about disconnecting devices from the network, that does not happen. The devices still remain connected, but if QBittorrent overloads the network, the phone perceives it as if the connection was lost.

buffer_test.zip (2.9 KB)

6

Just a friendly reminder: did you disable network acceleration after enabling SQM?

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image1154×819 31.4 KB

If you've already disabled it but haven't seen improvement, please let us know:

  1. The operating system and version running on your device hosting QBittorrent.
  2. The exact version of the QBittorrent.
  3. The approximate number of torrents currently active (seeding/downloading) in QBittorrent.
  4. The approximate number of connections (peers/seeds) QBittorrent is making.
  5. ISP promised upload and download bandwidth.
7

Yes, i was disabled acceleration, but its doesnt work.

  1. Windows 11 24H2 26100.4946

  2. qBittorrent v5.0.1 (64-bit)

  3. All torrents is active (37 currently)
  4. Limit of connections on screenshot (i know what is so many, but its not a problem for cheap keenetik sprinter)
  5. 800mbps+ (but local network is upped to 1gbps)
8

Hi

Thank you for the update, and apologies for the delayed response—we’ve just returned from the National Day holiday.

It appears the screenshot may not have loaded correctly.
Could you please resend it?

Could you please provide further details on the following:

  1. When the QB is running at full capacity, could you run a speedtest on other devices to check their internet speeds when SQM off?
    If possible, please test the speeds for both wired and wireless clients separately.

  2. If testing different Queueing discipline and scripts in SQM, would there be any improvements?

    image
    image964×724 32.7 KB

  3. If other devices are consuming all available bandwidth (running the same QB instance or conducting multiple prolonged speed tests), would you encounter the same issue?