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Cloud Computing is the blending technology of parallel and distributing computing paradigm, and its main aim is providing Everything as a Service (XaaS) to the consumers. The Infrastructure as a Service (IaaS) is one type of service models in Cloud Computing to provide infrastructure to the customers. The private cloud is one of the deployment models in cloud computing, and it offers resources to the consumers in an on-demand manner within or inside the organization. It is managed by different type of cloud middleware's and each them have their own mechanism and protocols. So there is an interoperability issue between these different type of private clouds, to solve this issue it is essential to describe a common mechanism. In this paper, we have devised a a broker based architectural framework to solve the interoperability issue between the Eucalyptus and OpenNebula based private clouds. The proposed work has incorporated with semantic based resource description and discovery, capacity based resource selection and resource provisioning mechanism. The proposed framework solves the interoperability between private clouds, enhances the efficiency of cloud resources, increases the scheduling success rate resulting in increase of throughput of application requests submitted to the resource broker in a better manner.