Apparatus for configuring and validating an intervention in a real-time Ethernet data network containing ECUs in a motor vehicle, the apparatus comprising: - a vehicle diagnostic device , which is configured to receive configuration change data and to transfer said data to a first data storage device ; - the first data storage device , which is configured to receive the configuration change data from the vehicle diagnostic device and to store said data; - a first data checking device , which is configured to check the configuration change data stored in the first data storage device by using a first integrity check and to transfer said data to a second data storage device in the event of a positive first integrity check; - the second data storage device , which is configured to receive the configuration change data from the first data checking device and to store said data; - a second data checking device , which is configured to check the configuration change data stored in the second data storage device by using a second integrity check and to enable said data for the real-time Ethernet data network in the event of a positive second integrity check taking into consideration the overall affected network state, wherein the second integrity check involves checking whether and what effects the configuration has on the network, this comprising checking the ECUs for the configured configuration and checking the associated communication relationship, - a configuration master device, which is configured to receive the enabled configuration change data from the second data storage device and to transmit said data to a switch and/or a component of the real-time Ethernet data network in order to renew at least part of an Ethernet TSN configuration in the ECUs and switches. - a vehicle diagnostic device , which is configured to receive configuration change data and to transfer said data to a first data storage device ; - the first data storage device , which is configured to receive the configuration change data from the vehicle diagnostic device and to store said data; - a first data checking device , which is configured to check the configuration change data stored in the first data storage device by using a first integrity check and to transfer said data to a second data storage device in the event of a positive first integrity check; - the second data storage device , which is configured to receive the configuration change data from the first data checking device and to store said data; - a second data checking device , which is configured to check the configuration change data stored in the second data storage device by using a second integrity check and to enable said data for the real-time Ethernet data network in the event of a positive second integrity check taking into consideration the overall affected network state, - a configuration master device, which is configured to receive the enabled configuration change data from the second data storage device and to transmit said data to a switch and/or a component of the real-time Ethernet data network in order to renew at least part of an Ethernet TSN configuration in the ECUs and switches. <EOS>