Flexible Ethernet FlexE
- 2. Content Flexible Ethernet Evolution of Ethernet Speed Evolution of PHY Demand FlexE – How does it work? FlexE- Key Features FlexE- Application Scenarios
- 3. What is it? Why is it important? Flexible Ethernet An emerging Layer 1.5 technology that enables flexible and programmable Ethernet operation Decouples dependencies between MAC and PHY Enables Ethernet PHY layer speed virtualization Flexible Ethernet is “agreed” in OIF-FLEXE-01.0 Standard Progress 2015 Q1: Project Start 2016 Q2: Member Ballot- Implementation Agreement 1.0 completed http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf Agreed by 80 members and standardized in one year, it’s got to be important
- 4. Evolution of Ethernet Speed 1983 1995 1998 2002 2010 40G/100G 802.3ba 10M 802.3 100M 802.3u 1000M 802.3z 10G 802.3ae 2016 2017 200G/400G 802.3bs 25G 802.3bq 2.5G/5G 802.3bz Keep making standards for every specific Ethernet speed? How often do we want to invest in transceivers? Evolution of Ethernet Speed Traditionally increment in steps of 10. i.e 10M -> 100M -> 1G… Emerging applications requires different speed 25Gbps for TOR 2.5/5Gbps for FTTH 25Gbps for CPRI Driven by need for speed, cost, economy of scale, and etc MAC PCS PMA PMD 802.3 Never Changed Standard Specific
- 5. Evolution of Application PHY Demand SDN / NFV Network as a Service Decouple Transport Dependency Decoupled Control & Data plane Control & Data traffic still shares the same PHY interface 5G network slicing Service separation down to PHY level PHY level BW flexibility Transport & Access Metro capacity evolve at different pace Asymmetry between DCI, transport, metro, and Access IsolationProgrammabilityFlexibility
- 6. Flexible Ethernet 1. FlexE promised to decouple MAC and PHY 2. FlexE virtualizes PHY 3. FlexE delivers three key capabilities Bonding Sub-Rating Channelization Group interfaces together to enable higher rate using existing technology Example: 200G MAC over two bonded 100G PHYs Match MAC rate to slower interface rate Example: 50G MAC over 100G PHY Aggregate & Distribute MAC traffic over interfaces Example: One 150G MAC and Two 25G MAC over Two bonded 100G PHY
- 7. OIF FlexE Architecture MAC PCS PMA PMD MAC FlexE PCS PMA PMD FlexE Shim is inserted between MAC and PHY FlexE Shim is a mediation layer across FlexE Group FlexE Calendar FlexE Client A FlexE Client B FlexE Client C FlexE Client N MAC A MAC B MAC C MAC N Sub Calendar A Sub Calendar B Sub Calendar C Sub Calendar N PHY A PHY B PHY C PHY N Configurable FlexE Group FlexE client is the source of MAC traffic FlexE Group is the PHYs participating in speed rendering FlexE Calendar is a TDM-based configurable mediation layer FlexE Shim takes the aggregate capacity of PHYS and make it available to FlexE Clients within the Group 802.3 802.3 + FlexE SHIM
- 8. OIF FlexE Shim Layer – Resource Rendering n PHYs shared among m Clients FlexE Shim enables the user to looks at the aggregate capacity of the PHY Group and divide them into virtual pipes with flexible capacity 4*100G => 10*40G 4*100G => 16*25G MAC client is mapped to an PHY capacity m Clients n PHYs A B C D E m 1 2 3 n 100G 100G 100G 100G A’ B’ C’ D’ E’ m’ OIF FlexE 1.0 supports FlexE clients of 10, 40, and m*25Gbps FlexE PHY of 100G (200/400G in 2.0) PHY granularity of 5G per block
- 9. FlexE- Bonding 200G MAC client distribute traffic across Two 100G PHY Advantage over LAG; no hashing 150G MAC client distribute traffic across Two 100 G PHY. Uses total of 150G PHY; 50G PHY available Bonding in PHY eliminate drawbacks of LAG Hashing Bonding Bonding + Sub-Rating
- 10. FlexE- Sub-Rating & Channelization 75G MAC client traffic over 100G PHY Sub-Rating; 25G PHY available 50G & 150G MAC clients distribute traffic over Two 100G PHY Channelization + Bonding Three MAC clients, 50G, 25G, and 25G sharing one 100G PHY Channelization Sub-Rating & Channelization to improve PHY efficiency and ROI Sub-Rating Channelization Channelization + Bonding
- 11. Questions?
Editor's Notes
- #6: Flexibility Programmability Isolation