Device for control of an IP network core comprising at least one interconnection gateway to at least one external data packet network and a plurality of switches (104,108), each switch being linked to at least one access point of an access network, the control device comprising: - a communication module able to communicate with an entity for control of the switches and with an entity for control of said at least one interconnection gateway, the communication module being configured to obtain from said control entities communication parameters intended to be used during a communication session of a terminal, the terminal being connected to an access point of the access network, these communication parameters comprising at least one communication parameter relating to a communication tunnel between a switch linked to the access point and the terminal established for said session according to a first communication protocol and at least one communication parameter relating to a communication tunnel between the switch and an interconnection gateway linked to this switch established for said session according to a second communication protocol distinct from the first protocol; - a control module, configured to formulate, on the basis of at least one communication parameter obtained by the communication module, at least one rule (R1-R14) for processing data streams relating to the communication session, this processing rule being intended to be applied by an equipment item from among said interconnection gateway, said switch and/or the access point; and - a transmission module for transmitting said at least one processing rule to this equipment item for application to the data streams relating to said communication session. - a communication module able to communicate with an entity for control of the switches and with an entity for control of said at least one interconnection gateway, the communication module being configured to obtain from said control entities communication parameters intended to be used during a communication session of a terminal, the terminal being connected to an access point of the access network, these communication parameters comprising at least one communication parameter relating to a communication tunnel between a switch linked to the access point and the terminal established for said session according to a first communication protocol and at least one communication parameter relating to a communication tunnel between the switch and an interconnection gateway linked to this switch established for said session according to a second communication protocol distinct from the first protocol; - a control module, configured to formulate, on the basis of at least one communication parameter obtained by the communication module, at least one rule (R1-R14) for processing data streams relating to the communication session, this processing rule being intended to be applied by an equipment item from among said interconnection gateway, said switch and/or the access point; and - a transmission module for transmitting said at least one processing rule to this equipment item for application to the data streams relating to said communication session.