There is provided a method comprising: preparing a data packet for transmission on a bearer, wherein at least one of the following is configured for transmission: a first network node and a second network node, checking whether at least one predetermined criterion is met, selecting, based at least partly on the said checking, whether to transmit the data packet via the first network node, via the second network node, or via both the first and the second network nodes, and transmitting the data packet according to the selecting.