100Gb/s Electrical Signaling

Transcription

1 100Gb/s lectrical ignaling I New thernet Applications Adhoc I 802 March 2017 Plenary March 14, 2017 Vancouver, BC, Canada I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

2 Contributors Joel Goergen, Cisco John Ambrosia, Futurewei (ubsidiary of Huawei) Rob tone, Broadcom Nathan Tracy, T Connectivity Mark Gustlin, Xilinx avid Ofelt, Juniper Gary Nicholl, Cisco upporters Andreas Bechtolsheim, Arista I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

3 Tonight s Meeting To measure the interest in 100 Gb/s electrical signaling as related to the following topic areas: Impact of 100Gb/s electrical signaling on existing relevant PHYs for existing thernet data rates Potential of 100Gb/s electrical signaling for new relevant PHYs for existing thernet data rates Consider impact of 100Gb/s electrical signaling on new PHYs for new thernet rates To discuss future of potential Call-for-Interest on areas that have significant consensus I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

4 The Never nding aga Face Plate Capacity & Optical Modules 32 Ports Typical Target QFP 2x BW Increase going from 100Gb to 200Gb QFP- / OFP - 4x BW increase going from 100Gb to 400Gb I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

5 Multiple Instances of an Interface Fabric /witch R BP C O N N LC C O N N R Nx??G Fabric - witch Interface R R N P U M A C R R G L U TX O/O RX O/O C2F/KR C2F/KR C2C C2M Consider how many instances of the interface can exist in the system KR C2C C2M LR, R, R CR or hort R I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

6 Impact of Interface Width on ystem Implementations oes not consider any potential limitations. I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

7 Historical Perspective Why 100Gb/s Now? Historical curve fit to highest rate switch products introduced to market (blue squares) ingle AIC IO capacity doubling every ~ 2 years I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

8 IO scape forcing transition to higher lane speeds xisting witch evices ~ 70mm package is a current BGA practical maximum (due to coplanarity / warpage) This will force BGA devices with > 14Tb/s of aggregate bandwidth to transition to lane rates of higher greater than 50G (possibly 100G?) I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

9 Backplane Considerations Questions to ask What is a backplane? What is the channel? What will work? ource: Nathan Tracy, T Connectivity, esigncon CI-112G: Considering lectrical Channels. I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

10 From a ystem Perspective One Type of Implementation Fabric /witch R BP C O N N LC C O N N R Nx??G Fabric - witch Interface R R N P U M A C R R G L U TX PHY RX PHY KR AUI C2C AUI C2M PHY I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

11 Breaking it own 1. PHYs 2. AUIs (each with its own issues) 1. Chip-to-Chip 2. Chip-to-Module 3. Backplane I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

12 The thernet Family (100 Gb/s and Above) ignaling (Gb/s) lectrical Interface Backplane Twinax MMF 500m MF 2km MF 10km MF 40km MF 10 CAUI-10 CR10 R10 10X10 25 CAUI-4 / 100GAUI-4 KR4 CR4 R4 PM4 CWM4 CLR4 LR4 R GAUI-2 KR2 CR2 R2 100 R GAUI GAUI-4 KR4 CR4 R4 R4 FR4 LR GAUI-16 R16 100GBA- 200GBA- 400GBA GAUI-8 FR8 LR8 100 R4 Includes thernet standards in development Underlined indicates industry MA or proprietary solutions I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

13 The thernet Family (100 Gb/s and Above) ignaling (Gb/s) lectrical Interface Backplane Twinax MMF 500m MF 2km MF 10km MF 40km MF 10 CAUI-10 CR10 R10 10X10 25 CAUI-4 / 100GAUI-4 KR4 CR4 R4 PM4 CWM4 CLR4 LR4 R GAUI-2 KR2 CR2 R2 100???? R??? GAUI GAUI-4 KR4 CR4 R4 R4 FR4 LR4 100??????? GAUI-16 R16 100GBA- 200GBA- 400GBA GAUI-8 FR8 LR8 100???? R4?? Includes thernet standards in development Underlined indicates industry MA or proprietary solutions I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada PHY Impacted by new AUI? New PHY?

14 Consideration of 100 Gb/s lectrical signaling and PHYs xisting PHYs FC defined to cover end-to-end link, based on 25Gb/s or 50 Gb/s electrical signaling. Would same FC support end-to-end link with 100Gb/s electrical signaling? Only 100GBA-R and 400GBA-R4 use 100Gb/s signaling per fiber. Other solutions based on 25 Gb/s or 50 Gb/s inverse mux to support other existing PHYs? Backwards compatibility New Copper PHYs (Backplane / Cu Cable) Can they be done? New PC / FC requirements? New Optical PHYs? Unknown at this time PC / FC requirements unknown. I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

15 From an Architectural Perspective FC end to end MAC R PC MAC R CX CAUI-z1 CAUI-z CX PC PM PM MI M MI M I A xtender FC PHY FC xtender FC I A MI MI PM PM PC CX CAUI-z1 PC CX R R MAC MAC Understanding FC requirements will be key aspect to architecture Use of xtender allows future proofing and flexibility Impact on optical modules? CAUI-z I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

16 High peed Front nd Interconnects The Road Map of Port Rates Follow the R I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

17 x 800 Gb? I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

18 The thernet Family (100 Gb/s and Above) ignaling (Gb/s) lectrical Interface Backplane Twinax MMF 500m MF 2km MF 10km MF 40km MF 10 CAUI-10 CR10 R10 10X10 25 CAUI-4 / 100GAUI-4 KR4 CR4 R4 PM4 CWM4 CLR4 LR4 R GAUI-2 KR2 CR2 R2 100???? R??? GAUI GAUI-4 KR4 CR4 R4 R4 FR4 LR4 100??????? GAUI-16 R16 100GBA- 200GBA- 400GBA GAUI-8 FR8 LR8 100???? R4?? 800GBA- 100??????? Includes thernet standards in development Underlined indicates industry MA or proprietary solutions I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada PHY Impacted by new AUI? New PHY?

19 Possible 800G Architecture 64B/66B ncoded 256B/257B Transcoder X^58 crambler AM Insertion FC ncoder ymbol istribution MAC/R PC PM MI Medium 800GAUI-8 MAC/R X 800GAUI-8 X PC 800GAUI-n PM MI Medium I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

20 nx100gb/s MAC/PC Technical Feasibility 100G/200G/400G MACs have been implemented in the industry already, 600G and above Flex MACs are being implemented today An 800G MAC is feasible in existing technology (16nm) in either AIC or FPGA technology A PC for each possible speed (100G, 200G, 400G and 800G) is feasible and can leverage existing technology, a possible PC choices is: Leverage 802.3bs/cd logic architectures Would include either KP4 FC, or something stronger is that is required Number of PC lanes = 16 or 8? Compact IP is possible, taking a small fraction of AICs or FPGAs I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

21 800 Gb/s Universal Ports? upport 800 Gb? What PHYs? nable 800 Gb/s Port Capacity? Increased density for previous thernet rates 8 x 100Gb 4 x 200Gb 2 x 400Gb I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

22 ummary 100 Gb/s is the next step on Follow the erdes and continues existing market trends witching capacity progression Reduction of interface width Impact of 100 Gb/s lectrical ignaling is broad across the thernet Family AUIs for existing PHYs for existing rates For new PHYs for existing rates New AUI s / PHYs for new rates? Is there interest in any one or combination of the above? What is the impact of 100 Gb/s electrical signaling? I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

23 Inventory of Issues (add as needed!) evelop 100 Gb/s electrical signaling FC AUI C2C AUI C2M Backplane Copper Cable How much coding gain is needed? Reuse of existing FC? FC architecture? - nd-to-end versus egmented Backplane definition & channel requirements upport of legacy PHYs Inverse Muxing? Can we get 100 Gb/s electrical signals to traditional pluggable optical modules? Is 800 Gb or 800 Gb/s capacity needed? I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada

24 Going Forward Where is the interest? Impact of 100Gb/s electrical signaling on existing relevant PHYs for existing thernet data rates Potential of 100Gb/s electrical signaling for new relevant PHYs for existing thernet data rates Consider impact of 100Gb/s electrical signaling on new PHYs for new thernet rates hould we start something? I NA Ad hoc, I 802 March 2017 Plenary, Vancouver, BC, Canada