The present invention relates to a system for transmitting a data flow (a) from a transmitter device (1) to a receiver device (2) via a network (3) with a packet-based transmission protocol, in particular via the TCP/IP-based internet, with the devices (1) and (2) being connected to the network via network access links (4,4′) and with a plurality of network access links (4,4′) for bundling being disposed on the side of the transmitter device and/or receiver device, with an auxiliary transmitter device (5) being interconnected between the transmitter device (1) and the network access link(s) (4) and with an auxiliary receiver device (6) being interconnected between the network access link(s) (4′) and the receiver device (2). The present invention also relates to a method of transferring a data flow via bundled network access links as well as to an auxiliary transmitter device and to an auxiliary receiver device and to a transmission and receiving method therefore.