Apparatuses, methods, and systems are disclosed for data packet steering on a multi-access data connection. One apparatus includes a processor, a first transceiver and a second transceiver that communicate with a mobile communication network via a first access network and a second access network, respectively. The processor determines to establish a multi-access data connection that includes a first user-plane connection over the first access network and a second user-plane connection over the second access network. The processor receives steering rules for the multi-access data connection and generates a first data packet to be sent over the multi-access data connection. The processor transmits the first data packet over a selected one of the first and second user-plane connections, the selection based a first steering rule that applies to the first data packet.