ip link add link eth0 name macvtap0 type macvtap mode bridge qemu-kvm -nographic -kernel /boot/vmlinuz-guest -append "console=ttyS0 root=/dev/vda" -drive file=/tmp/testroot.img,if=virtio,cache=none -net nic,model=virtio,macaddr=ea:2b:e4:95:ea:f5 -net tap,fd=3 3<>/dev/tap8

-net nic,model=virtio,macaddr=$(< /sys/class/net/macvtap0/address)
-net tap,fd=3 3<>/dev/tap$(< /sys/class/net/macvtap0/ifindex)>)>)