A broadband network gateway (BNG) in a wireline network. The BNG includes an interworking function in a control plane (IF-CP), the IF-CP configured to use a control plane interface (N1'/N2') between the BNG in the wireline network and a fifth generation (5G) core in a 5G network to couple a control plane of the BNG to a control plane of the 5G core; an interworking function in a user plane (IF-UP), the IF-UP configured to use a user plane interface (N3') between the BNG in the wireline network and the 5G core in the 5G network to couple a user plane of the BNG to a user plane of the 5G core; and a transmitter configured to transmit data packets toward the 5G core after the user plane of the BNG and the user plane of the 5G core have been coupled.