A node classifies data packets into different classes and replicates the data packets according to a number of redundant links configured for transmission of the data packets to obtain, for each of the redundant links, a redundant version of the data packets. For a first one of the classes, the node marks all redundant versions of the data packets with a first indication that the data packet is a guaranteed data packet. For a second one of the classes, the node marks at least one of the redundant versions of the data packets with a second indication that the data packet is a guaranteed data packet and marks at least one other of the redundant versions of the data packets with a third indication that the data packet is a non-guaranteed data packet.