A method and device for processing a network service instantiation request received by an orchestration entity using a virtualized network function service. A descriptor of the network service includes at least one reference to an object to be deployed in order to instantiate the network service. When the descriptor of the object is not available at the orchestration entity, the orchestration entity obtains information from the network service descriptor that can be used to identify at least one target entity configured to instantiate the object on instruction from the orchestration entity or to transmit the descriptor of the object to the orchestration entity, and transmits, to one of the at least one target entities, a request to instantiate the object or a request to recover a file comprising the descriptor of the object.