Thanks so much! 😄 I finally solved my problem 😉

First thing that I’ve do - I found this article 👉 https://mike632t.wordpress.com/2021/04/13/using-qemu-with-a-bridge-network-device/ and doing all from there.

The next thing - I’ve add a bridge to an existing network interface:

sudo brctl addif br0 eth0

The next step - I’ve started up this bridge:

sudo ip link set br0 up

And now everything works fine 👍

I checked the groups of my user, and my user is already in the netdev group 🤔

Maybe I need to add it to another group?

What is this group?