Looking Forward
PPPoE faces a difficult future. MPLS/IP backbones and IP-DSLAMs are considered the norm and the circuit switched family technologies (ATM/PDH) are being called legacy technologies. Pseudowire and VoIP can be used to deal with legacy customers and equipment. PPPoE has the highest overhead DSL delivery method.
ATM, because of its overhead, is also being purged and PPPoE goes out with that. For example, Verizon's FIOS product has converted to using DHCP internet access instead of PPPoE delivery. GPON, an upgrade of BPON, added an alternative to ATM]. PPPoE networks face difficulty in adding multicasting and many level of QoS and lowest overhead for highest speeds for IPTV in today's convergence and triple play networks.
Read more about this topic: Point-to-point Protocol Over Ethernet