def METHOD_NAME(target_ip4: str) -> Optional[str]:
    iface = get_iface_by_ip4(target_ip4)
    if iface:
        return _get_gw_mac_address_v4(
            gw_ip=target_ip4,
            vlan="NO_VLAN",
            non_nat_arp_egress_port=iface,
        )
    return None