Bridge for VMs

ip a

Problem

I have changed the default 192.162 subnet in my house to a 10.0 one. In a recent arch install without network manager the libvirt default bridge ends up miss-configured resulting in VMs that can't connect to the internet. Thus the following solution creates a usable bridge:

add a bridge

ip link add name br0 type bridge
ip link set dev br0 up

give it an address (one that works with your subnet, outside of dhcp range if possible)

ip addr add 10.0.0.20/24 dev br0

set it as master in your interface

ip link set enp0s31f6 master br0
# just in case
ip link set dev enp0s31f6 up

libvirt vm config