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Intercloud is a promising technology for data intensive applications. However, an important issue for Intercloud applications is orchestration of various virtualized and performance-assured resources, not only computers, but also network and storage, provided from multiple domains. We have been developing an advance reservation-based resource management framework, called Grid ARS, which can integrate heterogeneous resources and construct a performance-assured virtual infrastructure over Intercloud environment. Grid ARS provides four services that address resource management, resource allocation planning, provisioning and monitoring of the constructed virtual infrastructure. Grid ARS has been developed using common Web services technologies and standards. In this paper, we present overview of Grid ARS and its service components and describe Grid ARS demonstration challenges, demonstration at GLIF2010 and SC10 and OGF NSI interoperation in 2011.