A mobility management entity (MME) receives a first message for a wireless device supporting a first number of bearers. In response to receiving the first message, the MME selects a network gateway from a plurality of network gateways, based on a second number of bearers supported by the network gateway. The MME sends, to the network gateway, a create session request message for creating an internet protocol-connectivity access network (IP-CAN) session for the wireless device supporting the first number of bearers. The create session request message comprises an address of the network gateway. The MME receives, from the network gateway, a create session response message confirming creation of the IP-CAN session.