Some embodiments provide a method for identifying a realization status of one or more logical entities of a logical network. In some embodiments the method is implemented by a controller that controls network data communications in a logical network. The method receives a request for realization status of a set of logical entities at a particular point of time that is associated with a particular value of a realization number. The method determines whether configuration data up to the particular point of time for each logical entity in the set has been processed and distributed to a set of local controllers that operates on a set of host machines. The method returns a realization reply that includes a successful realization message when the configuration data up to the particular point in time for each logical entity in the set has been processed and distributed to the set of local controllers.