According to my knowledge private cloud solutions involve creating and managing a cloud environment within your organization's infrastructure. It offers greater control over data and security but requires maintaining hardware and infrastructure. Cisco offers solutions like Cisco UCS (Unified Computing System) and HyperFlex for building private clouds. These solutions can be integrated with your existing data center architecture.
Remember to always refer to the official documentation of the respective platforms and solutions for the most accurate and current information. If you're looking for detailed guidance, configuration steps, and best practices, the official documentation from Cisco, AWS, and Azure is your best resource.