A method for hierarchically storing data connection information in network nodes (41, 42) of a mobile radio network which is designed to transmit data packets in accordance with an IP-based tunnel protocol, comprising the following method steps: a) defining a plurality of different data traffic classes; b) providing, by a mobile radio-capable device, using the IP-based tunnel protocol a data connection establishment message for establishing a data connection via the mobile radio network to a destination device (50, 51) connectable to the mobile radio network, the data connection establishment message containing information for identifying one of the plurality of data traffic classes; c) transmitting the data connection establishment message provided in step b) to a core network of the mobile radio network; d) establishing, by the core network, in response to the data connection establishment message an IP-based tunnel connection between a first network node of the core network associated with the mobile radio-capable device and a second network node of the core network associated with the destination device (50, 51); e) assigning, by the core network, a unique tunnel identifier of the IP-based tunnel connection established in step d); f) determining, by the first network node and by the second network node, in each case by evaluating the identification information contained in the data connection establishment message the data traffic class assigned to the data connection establishment message; g) hierarchically storing, in the first network node and in the second network node, each at least partially the data connection establishment message and the unique tunnel identifier assigned to the IP-based tunnel connection in step e) as a data connection information depending on the data traffic class determined in step f); and h) repeating steps b) to g) for at least one further mobile radio-capable device. a) defining a plurality of different data traffic classes; b) providing, by a mobile radio-capable device, using the IP-based tunnel protocol a data connection establishment message for establishing a data connection via the mobile radio network to a destination device (50, 51) connectable to the mobile radio network, the data connection establishment message containing information for identifying one of the plurality of data traffic classes; c) transmitting the data connection establishment message provided in step b) to a core network of the mobile radio network; d) establishing, by the core network, in response to the data connection establishment message an IP-based tunnel connection between a first network node of the core network associated with the mobile radio-capable device and a second network node of the core network associated with the destination device (50, 51); e) assigning, by the core network, a unique tunnel identifier of the IP-based tunnel connection established in step d); f) determining, by the first network node and by the second network node, in each case by evaluating the identification information contained in the data connection establishment message the data traffic class assigned to the data connection establishment message; g) hierarchically storing, in the first network node and in the second network node, each at least partially the data connection establishment message and the unique tunnel identifier assigned to the IP-based tunnel connection in step e) as a data connection information depending on the data traffic class determined in step f); and h) repeating steps b) to g) for at least one further mobile radio-capable device.