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Differentiators: flow-based preference control, focused discard of selected flows if capacity limits reached, available rate service, flow-based monitoring (cheaper than DPI) Remote FSA Content source Bandwidth shared by multiple flows to multiple end-systems. IP core EndSystem FSA End-point Manager Initially no content is assumed to be FSA Later.. Local FSA Content source FSA downstream signalling & focused discard control Service Provider In-band signals co-ordinate flow-based QoS actions, especially: • flow accepted but flow vulnerable to discard (MR service) • flow preference priority. • current available rate (AR service). • current available rate + minimum rate (VR service). There is also a Guaranteed Rate service (GR) that requires admission Control prior to the start of transmission of data. Standards developed from TIA 1039 and Y.2121. Back-up slides draft-adams-tsvwg-flow-signalling-codepoint-00 Discusses more details about the desire for a new IPv6 codepoint to indicate in-band FSA signalling Broadband services will typically utilize Ethernet as the layer two protocol. PPPOA over DSL will be replaced by PPPOE and PPPoE between the MSAN and the service provider BRAS. An alternative of Bridged Ethernet between the MSAN and Service provider BRAS is also an option. • Broadband services will be supported by incorporating an Ethernet MAC layer as defined in PPPoE. • The use of DHCP to allocate IP addresses becomes an option following the incorporation of the Ethernet MAC layer and needs to be considered longer term in order to enable PPP to be removed Native Ethernet native Ethernet functionality may include: 802.1ad (VLANS, and Q in Q) , moving to 802.1ah (MAC in MAC) Ethernet enhancements for carrier grade scalability including: Link Aggregation OAM IEEE/ITU IEEE 802.1ag Ethernet OAM EFM & MEF OAM Potentially MEF Ethernet UNI Preservation of Network & Customer timing over Ethernet Four fibre systems from MSAN node to parent Metro Node Metro Node MSAN Node Dual lead in with duct bypass MSAN Node Physical ring MSAN Node Dual lead in with duct bypass Metro Node MSAN Node For a minority of the most stringent applications (e.g. Broadcast TV or financial data applications), it is very unlikely that 1:N or even 1:1 network based protection switching will provide the required level of performance. For these applications the customer may require two diverse physical paths. The customer would then transmit over both paths and at the receive end would time align the two signals (by short buffer) such that they could seamlessly switch between them on failure of the active feed.