# Append this to /etc/networl/interfaces

auto br0

iface br0 inet manual
        bridge_ports eth0
        bridge_stp off
        bridge_waitport 0
        bridge_fd 0

allow-hotplug usb0
iface usb0 inet manual
        pre-up ifup br0
        pre-up brctl addif br0 usb0
        up ifconfig usb0 up

# Add this to /etc/dhcpcd.conf

denyinterfaces eth0 usb0