Syncthing enforces speed limit even in LAN

Support
1

I have set up Synthing (v1.15.1, Linux (32-bit ARM)) on my Raspberry Pi 3B+. I have two android devices that sync the data to my syncthing server locally and globally. The Syncthing is bound to 127.0.0.1 and I access the Web GUI via NGINX reverse proxy.

I have set up speed limits for global transfers to 100KiB/s for both devices for upload and download. Also, I made sure that the “Limit Bandwidth in LAN” option is disabled in Advanced configuration. However, I have noticed that this speed limit is followed for both LAN transfers and non-LAN transfers.

Why is Synchting identifying even the LAN connections as non-LAN connections?

Edit: I forgot to mention another thing. I changed the Syncthing address from 127.0.0.1 to 0.0.0.0, and the proper functionality was restored. However, I would still be interested in knowing the cause for this behaviour.

2

I suspect the cap in speed is happening due to weak hardware, not due to options selected. What remote device ip addresses are reported in the logs as they connect?

3

I don’t think that the cap is due to the hardware because it starts working immediately as soon as I set synchting address to 0.0.0.0. However, I will check the logs and send them to you soon

4

This occurs on Windows nodes for me as well, did not test Linux nodes. Also, interestingly, each tested Windows node has a custom Sync Protocol Listen Addresses and is using a custom port.

@gopaljigaur are you using a a custom Sync Protocol Listen Addresses?

5

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