DC Network Connectivity

Transcription

1 DC Network Connectivity Options & Optimizing TCO Rakesh SAMBARAJU - Application Engineer Nexans Data Center Solutions

2 Agenda l Part I Ethernet Standards and Technologies Ø Current Ethernet Standards Ø Technologies for Future Ø Upcoming Standards l Part II Layer-1 total Cost of Ownership Ø Assumptions Ø Cost Comparison lconclusions

3 Ethernet Current Standardized Line Speeds 10GBASE-SR 10GBASE-LR 25GBASE-SR 25GBASE-LR 1000BASE-SX 1000BASE-LX 10BASE- 100BASE-

4 Ethernet Drivers & Limitations l LASER Technology Ø VCSEL, DFB, DML,EML, Packaging, Chip-to-fiber coupling, etc. l Serializer/De-serializer (SERDES) l Electronics Ø Drivers and Amps: Speed and linearity, photo-detectors efficiency, etc. l Module form-factors, connectors

5 Ethernet: Higher Speeds l Multiples of single line speeds l Several multiplexing techniques available Ø Parallel Optics MPO, predominantly multimode Ø WDM predominantly single mode Ø Advanced Modulation PAM4, DMT, etc. Increased spectral effeciency Ø Optical Phase/Polarization Inter-DC l Limitations Ø LASER Packaging, SERDES speeds, linearity of electronics, etc.

6 Ethernet: Higher Speeds 10GBASE-SR 10GBASE-LR 25GBASE-SR 25GBASE-LR 1000BASE-SX 1000BASE-LX 10BASE- 100BASE-

7 Ethernet: Higher Speeds 100GBASE-SR10 100GBASE-LR4 100GBASE-SR4 10GBASE-SR 10GBASE-LR 1000BASE-SX 1000BASE-LX 25GBASE-SR 25GBASE-LR 10BASE- 100BASE-

8 Ethernet Current Standard Speeds Ethernet Speed Line Speed 10G 10.3 Gbaud 25G 26.5 Gbaud 40G 10.3 Gbaud 100G 10.3 Gbaud 26.5 Gbaud Multiplexing Method IEEE Name Fiber Type and Number Connector Reach N/A 10GBASE-SR MMF; 2 Duplex-LC 400 m 10GBASE-LR SMF; 2 Duplex-LC 10 km N/A 25GBASE-SR MMF; 2 Duplex-LC 100 m 25GBASE-LR SMF; 2 Duplex-LC 10 km 4x Fibers 40GBASE-SR4 MMF; 8 12F MPO 150 m 4x Wavelengths per fiber 10x Fibers 40GBASE-LR4 SMF; 2 Duplex-LC 10 km 100GBASE- SR10 MMF; 10 24F MPO 150 m 4x Fibers 100GBASE-SR4 MMF; 8 12F MPO 100 m 4x Wavelengths per fiber 100GBASE-LR4 SMF; 2 Duplex-LC 10 km

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10 100GBE Non Standard Options Ethernet Speed Line Speed 100G 10.3 Gbaud 100G 26.5 Gbaud Multiplexing Method Name Fiber Type and Number Connector Reach 10x Fibers 100G-eSR10 MMF; 10 24F MPO 400 m 4x Fibers 100G-PSM4 SMF; 8 12F MPO 500 m 4x Wavelengths per fiber 100G-SWDM4 MMF; 2 Duplex-LC 100 m/ 300 m (OM4?/OM5) 100G-LR4L SMF; 2 Duplex-LC 2 km 100G-CWDM4 SMF; 2 Duplex-LC 2 km 100G PSM4 MSA

11 100G: Performance vs. Cost PARAM 100G-LR4 100G-CWDM4 100G-PSM4 Reach (Max.) 10 km 2 km 500 m Link Loss Budget 6.3 db 5 db 3.3 db Connector Max. Wavelengths 2.0 db 4.0 db 3.0 db nm nm nm nm nm nm nm nm 1310 nm Wavelength tolerance 02 nm 13 nm 30 nm CWDM Channel Spacing 03 nm 07 nm N/A TDP (Max.) 2.2dB 3.0 db 3.8 db

12 Technologies for the Future PAM-4 SWDM4/OM5 Silicon Photonics

13 200G & 400G Standards Ethernet Speed Line Speed 200G 26.5 Gbaud 400G 26.5 Gbaud 53 Gbaud 26.5 Gbaud Multiplexing Method Name Fiber Type and Number PAM4 + PSM4 (4x fibers) PAM4+4 channel WDM 200GBASE- DR4 200GBASE- FR4 200GBASE- LR4 16 x Fibers (NRZ) 400GBASE- SR16 PAM4 + PSM4 (4x fibers) PAM4+8 channel WDM 200GBASE- DR4 400GBASE- FR8 400GBASE- LR8 Connector Reach SMF; 8 12F MPO 500 m SMF, 2 Duplex-LC 2 km SMF, 2 Duplex-LC 10 km MMF; 32 32F MPO 100 m SMF; 8 12F MPO 500 m SMF, 2 Duplex-LC 2 km SMF, 2 Duplex-LC 10 km

14 Conclusions part 1 l Market needs 100G today Ø Performance and cost related Ø Optics Cost: CWDM > PSM4 Ø Cabling Cost: PSM4 > CWDM l 200G and 400G under discussion Ø Need multiple multiplexing techniques together Ø MMF: SWDM options considered Ø SMF: PAM4+ PSM4/WDM Ø Multiple MSAs created already. (CWDM8, 100GLambda)

15 Part 2: Total Cost of Ownership l Optics and Cabling independently have different cost options l Migration to be considered when choosing WDM vs PSM4 Ø What are the limits of WDM? Ø Implications of advanced modulation formats on performance l Cost Analysis should be holistic with cable, connectivity, and Optics

16 Optics l Depending on architecture, 40-80% of Layer 1 cost is associated with transceiver l Included in this value are DACs and AOCs 16 I

17 Optics cost factors l SM vs. MM l Number of fibers l Encoding/power 17 I

18 Optics Cost evolution 18 I Source: LightCounting, High Speed Datacenter Optical Interconnects, Sep 2016 (used with permission)

19 Cabling l Depending on architecture, 20-60% of Layer 1 cost is associated with cabling l Included in this value are the cable, connectors, patch panels, etc. 19 I

20 Cabling cost factors l Multimode vs. Single-Mode l LC vs. MPO l Number of connections 20 I

21 Cable vs. Optics 40G $30/Gbps $17/Gbps 21 I

22 Cable vs. Optics 100G ~$17/Gbps ~$17/Gbps 22 I

23 Conclusion l The physical layer is comprised of more than just cable l By making a whole decision on the link is more efficient than sequential component decisions l Tailored solutions need to be able to be cost effectively deployed l This can be calculated as $/Gb 23 I

24 Questio ns? Rakesh SAMBARAJU, Ph.D. Applications Engineer Data Center Solutions Nexans