gentoo用systemd-networkd的dhcp失败Failed to configure DHCPv4: No such file or directory

gentoo用systemd-networkd的dhcp失败，报错Failed to configure DHCPv4: No such file or directory
查了下是因为系统id没有初始化
命令行执行

# systemd-machine-id-setup
# systemctl restart systemd-networkd