Some embodiments provide a method for a network management and control system that manages a virtual infrastructure deployed across a set of datacenters. The method receives a definition of an application to be deployed in the virtual infrastructure. The application definition specifies (i) a set of tiers of the application and (ii) a set of requirements for deploying the application. Based on the application definition, the method automatically defines a logical network architecture for connecting data compute nodes (DCNs) that implement the application tiers in the set of datacenters. The method configures a set of forwarding elements in the set of datacenters to implement the logical network architecture.