Method for transparent on-board routing of data packets at high bit rate, implemented by a satellite telecommunication system, the satellite telecommunication system comprising - an origin transmitting station (4; 54; 104), a first destination receiving station (6; 56; 106), a second destination receiving station (8; 58; 108), and a plurality of at least one satellite(s) (10, 12, 14; 60, 62; 110); and - a first radiofrequency uplink (24; 64; 124) which connects the origin transmitting station (4; 54; 104) to a first satellite (10; 60; 110) of the plurality, configured as an origin satellite with respect to the origin transmitting station; - a second radiofrequency downlink (26; 66; 126) which connects, in a first configuration, the first destination receiving station to a second satellite of the plurality, configured as a first destination satellite with respect to the first destination receiving station, or which connects, in a second configuration and a third configuration, the first destination receiving station (56; 106) to the first satellite, configured as a first destination satellite with respect to the first destination receiving station (56; 106); - a third radiofrequency downlink (28; 68; 128), which connects, in the first configuration, the second destination receiving station (8; 58; 108) to a third satellite of the plurality, configured as a second destination satellite with respect to the second destination receiving station, or which connects, in the second configuration, the second destination receiving station to a second satellite of the plurality, configured as a second destination satellite with respect to the second destination receiving station, or which connects, in the third configuration, the second destination receiving station to the first satellite, configured as a second destination satellite with respect to the second destination receiving station; the first, second and third satellites (10, 12, 14) of the first configuration, or the first and second satellites (60, 62) of the second configuration being interconnected to one another by a space network (32; 72) comprising at least two or at least one inter-satellite link(s) (34, 36; 74), and the first satellite of the third configuration comprising an internal router; the transparent on-board routing method being characterised in that: - the origin transmitting station (4; 54; 104) segments high bit rate data streams received into coded or uncoded BBFRAME packets each having the structure of a coded or uncoded baseband frame BBFRAME as defined by the DVB-S2 protocol; and - the origin transmitting station (4; 54; 104) inserts, for each coded or uncoded BBFRAME packet, an on-board routing label in a single piece associated with the coded or uncoded BBFRAME packet, respectively, by including the on-board routing label in and at the start of a payload data field of the BBFRAME packet when the BBFRAME packet is uncoded, or by externally adding the on-board routing label to the BBFRAME packet when the BBFRAME packet is coded; the on-board routing label associated with the coded or uncoded BBFRAME packet containing an identifier of the destination receiving station associated with the coded BBFRAME packet, from among the first destination receiving station (6; 56; 106) and the second destination receiving station (8; 58; 108). - an origin transmitting station (4; 54; 104), a first destination receiving station (6; 56; 106), a second destination receiving station (8; 58; 108), and a plurality of at least one satellite(s) (10, 12, 14; 60, 62; 110); and - a first radiofrequency uplink (24; 64; 124) which connects the origin transmitting station (4; 54; 104) to a first satellite (10; 60; 110) of the plurality, configured as an origin satellite with respect to the origin transmitting station; - a second radiofrequency downlink (26; 66; 126) which connects, in a first configuration, the first destination receiving station to a second satellite of the plurality, configured as a first destination satellite with respect to the first destination receiving station, or which connects, in a second configuration and a third configuration, the first destination receiving station (56; 106) to the first satellite, configured as a first destination satellite with respect to the first destination receiving station (56; 106); - a third radiofrequency downlink (28; 68; 128), which connects, in the first configuration, the second destination receiving station (8; 58; 108) to a third satellite of the plurality, configured as a second destination satellite with respect to the second destination receiving station, or which connects, in the second configuration, the second destination receiving station to a second satellite of the plurality, configured as a second destination satellite with respect to the second destination receiving station, or which connects, in the third configuration, the second destination receiving station to the first satellite, configured as a second destination satellite with respect to the second destination receiving station; - the origin transmitting station (4; 54; 104) segments high bit rate data streams received into coded or uncoded BBFRAME packets each having the structure of a coded or uncoded baseband frame BBFRAME as defined by the DVB-S2 protocol; and - the origin transmitting station (4; 54; 104) inserts, for each coded or uncoded BBFRAME packet, an on-board routing label in a single piece associated with the coded or uncoded BBFRAME packet, respectively,