A processor-implemented method of operation for a user-facing provider edge, u-PE, device of an Ethernet access network, the method comprising: receiving a customer frame from a Digital Subscriber Line Access Multiplexer, DSLAM, device (18, 19), the customer frame being of a first format that includes a customer Media Access Control, MAC, header, a payload and a first Virtual Local Area Network, VLAN, tag with a VLAN identifier of a first predetermined bit length, the first VLAN tag identifying a Digital Subscriber Line, DSL, subscriber; and re-formatting the customer frame into a provider frame having a second format, the re-formatting comprising: mapping the first VLAN tag to a second VLAN tag with a VLAN identifier of a second predetermined bit length greater than the first predetermined bit length, the second VLAN tag identifying a service instance of the Ethernet access network, and adding a third VLAN tag that specifies a broadcast domain of the Ethernet access network, wherein the broadcast domain corresponds to a DSL service type; wherein the provider frame comprises the customer MAC header and payload and the second and third VLAN tags and includes a provider source MAC address that represents a MAC address associated with the DSLAM, and a provider destination MAC address that represents a MAC address of a destination service node (30, 31). receiving a customer frame from a Digital Subscriber Line Access Multiplexer, DSLAM, device (18, 19), the customer frame being of a first format that includes a customer Media Access Control, MAC, header, a payload and a first Virtual Local Area Network, VLAN, tag with a VLAN identifier of a first predetermined bit length, the first VLAN tag identifying a Digital Subscriber Line, DSL, subscriber; and re-formatting the customer frame into a provider frame having a second format, the re-formatting comprising: mapping the first VLAN tag to a second VLAN tag with a VLAN identifier of a second predetermined bit length greater than the first predetermined bit length, the second VLAN tag identifying a service instance of the Ethernet access network, and adding a third VLAN tag that specifies a broadcast domain of the Ethernet access network, wherein the broadcast domain corresponds to a DSL service type; wherein the provider frame comprises the customer MAC header and payload and the second and third VLAN tags and includes a provider source MAC address that represents a MAC address associated with the DSLAM, and a provider destination MAC address that represents a MAC address of a destination service node (30, 31). mapping the first VLAN tag to a second VLAN tag with a VLAN identifier of a second predetermined bit length greater than the first predetermined bit length, the second VLAN tag identifying a service instance of the Ethernet access network, and adding a third VLAN tag that specifies a broadcast domain of the Ethernet access network, wherein the broadcast domain corresponds to a DSL service type; wherein the provider frame comprises the customer MAC header and payload and the second and third VLAN tags and includes a provider source MAC address that represents a MAC address associated with the DSLAM, and a provider destination MAC address that represents a MAC address of a destination service node (30, 31).