Low Cost 100GbE Data Center Interconnect

Low Cost 100GbE Data Center

Interconnect

Chris Bergey

VP Marketing, Luxtera

[email protected]

Low Cost 100GbE

Data Center Interconnect

 Where does 100GbE come into the data center

 Challenges in the data center/equipment design

 Evolution of 100GbE

• Digital interfaces • Fiber plant

• Modules • Embedded

San Jose, CA USA

Add Graphic Here Showing

Datacenter 100G placement

Challenges in Data Center

Equipment Design for 100Gb

 Silicon capability outstrips 1U density capability

 Power Consumption/Size

San Jose, CA USA

February 2012 4

Add picture of 1U switch

Size (LxWxH) Max Power

SFP 48x14x9 1.5W

QSFP 52x18x9 5W

CFP2 106x42x12 12W

Challenges in Data Center

Equipment Design for 100Gb

 25G Signaling on PCB

 Reach

IEEE Standardization Efforts for 100GE

2/15/2012 Page 6

0 to 30m: Active Optical Cable – Wavelength Agnostic

Reach limited by deployment practicality of AOC, not by the optical transceiver

0 to 70m?: Parallel Multi-Mode Fiber – 850nm?

0 to 2000m: Advanced Encoding – 1310nm

0 to 10,000m: WDM Single Mode Fiber – 1310nm 4x25G QSFP

4x25G QSFP with MPO

4x25G QSFP with LC Embedded Optics with LC

4x25G QSFP with LC Embedded Optics with LC

0 to 1000m: Parallel Single Mode Fiber – 1310nm

4x25G QSFP with MPO Embedded Optics with MPO

Longer Reach Possible

Longer Reach Possible SR10 - 0 to 300m

Parallel Multi-Mode Fiber

LR4 - 0 to 10,000m

Modules

 MSA Module Evolution

• Supply chain advantages

– Multivendor – Supply – Cost

• Equipment vendor interoperability • Fiber plant flexibility

• Optics reliability

Single mode in the data center

 Historically multi-mode has been used

• Transceivers were cheaper

• Fiber was more expensive but distance was short enough that it didn’t matter

 Many aggressive data centers are now

moving to SMF

• Can support the largest datacenter reaches

• Offers future proofing (NRZ speeds, advanced encoding, multi-wavelength)

• Silicon Photonics friendly which drastically lowers transceiver cost

San Jose, CA USA

Fiber Cost Comparison

Density Fiber Type Relative

Cost

24f OM3 3.0

24f OM4 4.3

24f SMF 1

Duplex SMF 2.0*

Source: Jan 2012 quote from cable vendor LC or MTP Termination costs not included. * Cost to derive 12 - duplex pairs

24f Relative Fiber Cost

24-Fiber SMF cable is half the cost of 12 duplex SMF cables, 1/3 the cost of 24f OM3 and 1/4 the cost of 24f OM4

Fiber + Module Cost Comparison

@ 100m

Including the fiber cable, even at 100m MR4 is potentially the lowest cost overall solution.

This cost advantage increases with longer reach.

Evolution of Copper Backplanes

 Copper backplane solutions historically transitioned from multi-chip to integrated solutions

• Start with switch + backplane copper transceiver PHY

• Followed by switch with integrated transceiver PHY

 Similar transition cycle occurred at 3.125G, 6.25G and 12.5G

MSA Switch MSA N ports to network KR or SFI KR electrical MSA Switch MSA N ports to network KR or SFI

Switch Blade - M ports to backplane

Phase 1 – Multi-chip with backplane drivers Phase 2 – Integration

SFI KR

CPU

Server Blade – 2 or 4 ports to backplane

SFI KR PCI PHY PHY PHY PHY E m bedded PHY NIC 2x / 4x PHY CPU

Server Blade – 2 or 4 ports to backplane

KR PCI

NIC 2x / 4x

Switch Blade - M ports to backplane

C opper B ac k pl ane C opper B ac k pl ane 2/15/2012

Optical Evolution in Rack

Switch Blade - M ports to backplane

4x28G/Port

Electrical Optical Switch

Switch

Switch and Blade Architecture with Optical I/O

Switch Optical

ports to network

Optical Switch Blade - M ports to backplane

Switch and Blade with Optical SoC Architecture

CONTEMPORARY:

MSA and AOC

EMERGING:

Embedded Optics

Future:

SoC Optics Integration

 Opto-Electronic SoC Integration will enable new high-performance compute and networking architectures

What lies ahead for 100G and

beyond?

 100G Serial

What lies ahead for 100G and

beyond?

 ASIC Integration

San Jose, CA USA

Questions?

Chris Bergey

VP Marketing, Luxtera

[email protected]