Raspberry Pi3 - wifi and wired connection - Can't get both working at same time after reboot

Hello

I have maybe a trivial question of network prioritization under linux :

I have my Rpi which is in Wifi (sufficient connection for streaming), and I connected my PC to my Rpi (to have a correct transfer rate between the 2; like 30 mo/s, for transferring files of several GB easily). It works perfectly, except that I have a prioritization conflict between the 2 connections if I restart the Rpi.

Let me explain in detail:

What I did to make my PC/Rpi connection via ethernet "reliable", is to make the 'ethernet' address of the Rpi static (see https://www.ask-sheldon.com/static-ip-on-libreelec/).

And it works perfectly.

The only problem is that if I restart the Rpi, I no longer have access to the Internet.

The only way to solve it is to temporarily disable the wired connection via the libreelec menu. And there, it works = I have internet. And I can reactivate the wired connection right after, which also works.

It seems that when I restart, the 2 connections of the Rpi (wifi for internet, and ethernet for the connection to my PC) are interfering with each other, and that I have to deactivate the ethernet, so that the conflict is resolved.

Looking around, I found a post that I think describes my problem well:

Thread

SOLVED: Raspberry Pi2 - wifi and wired connection - Can't get both working at same time.

I have a raspberry pi 2 setup with the latest GA release of libreelec. The wireless connection connects to the internet and the wired connection connects to a NAS system.

I have both connections setup with static IP addresses.

After a reboot, only the wired connection works. In order to get everything working, I need to disable both network interfaces through the Libreelec Addon and then re-enable them.

This is the only way I can get both network connections working at the same time.

Is there a…

msalerno

December 8, 2017 at 5:06 PM

But the proposed solution (which is simple and that I manage to implement), does not change anything.

- Is there an alternative command that could work better? (based on systemd, or other tricks)

- Is there anything else I need to check? I thought about the idea of having to fix my ip for wifi on my Rpi, but I don't know if that would change anything (and more importantly, I think it does, since this IP address has been fixed for years)

Any idea ?

Thanks !

Arthur

Thanks for your answer mglae.

I tried your solution, but it didn't work which would normal i guess: in the connman_main.conf, it said that enabling the SingleConnectedTechnology will permits to have only one connection. Whereas I wish my solution to be 2 connections at the same time:

- wifi : internet

- ethernet : to connect to my other machine under windows 10.

My setup as described previously is functional (2 connections at the same time internet+windows); my only problem is to keep that when rebooting.

Is there any other solution to my problem (which is minor, I agree)?

Thanks!