Max speed using Beryl AX (GL-MT3000) with Tailscale

Router
1

Hello guys,

Hope you are doing well. I am using a Beryl AX (GL-MT3000) router with Tailscale and an Exit Node ( CHUWI LarkBox X 2023) connected on the same local network using 1Gpbs ports in all devices. Doing a speedtest without any tunnel I can reach 950 Mbps (UP/DOWN).

When the traffic goes from PC -> Beryl AX -> Exit Node. At most I reach 150 Mbps (UP/DOWN) using speedtest-cli. Tailscale ping/status shows the private IPs within my local network (No Derp servers). If I do the same test from my PC configuring Tailscale client to use the Exit Node and plugin the PC directly to my main router (PC -> Exit Node), the speed goes to about 800 Mbps.

I have tried various MTU settings on the client PC but the speed difference is minimal. Any idea where the problem might be? I would say it is the Beryl router, but after many configuration changes I have not improved the speed.

PS: Using version Tailscale 1.66.4 in all devices. All devices are in the same subnet and connected to the same main router (Mercusys AX3000).

Thanks!

2

The speed depends on the amount of CPU and RAM WireGuard can use, because that's what Tailscale runs on. So on a Beryl AX there is a max speed for WireGuard of 300 Mbps (see here)

I am not sure about the overhead of Tailscale but all in all I would assume that this speed is fine.

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Thank you very much for your answer, Yes I think I have reached the maximum speed, the website you share it also mention this "OpenVPN and WireGuard speeds will be slower when running the device as a server. Results above are in client mode." I'm a bit disappointed because I thought I could have a speed closer to 300 Mbps, but still the result is good :slight_smile:

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