1. Trends in Interconnects & Integration
Moderator Greg McSorley, Amphenol
Panelists
Brad Booth, Dell
Chris Cole, Finisar
Matt Traverso, Cisco

2. Gb Ethernet interconnects today
Passive Copper Cable
Active Copper Cables
Optical
10/100/1000M
Category 5/6
Coax
SC/LC MM OM1/2
SC/LC SM
10Gb
Category 6/7
SFP+ DAC
LC MM OM1/2/3/4
LC SM
40Gb
QSFP+ DAC
40GBASE-CR4
LC MM OM3/4
100Gb 10 x 10
CXP Direct Attach Twin Ax
CFP2 Direct Attach Twin Ax
CFP2
100Gb 4 x 25
QSFP+ Direct
CFP4 DAC
DAC = Direct Attach Twin Ax Cable
© 2012 Ethernet Alliance

3. Panelists
Brad Booth Director, Network Architecture Office of the CTO | Enterprise Solutions Group
Chris Cole Director, Transceiver Engineering Finisar Corporation
Matt Traverso Engineering Manager Transceiver Module Group, Cisco Member Ethernet Alliance Board of Directors

4. Optical vs. Copper Cost Comparison at 100G Brad Booth Director, Network Architecture Office of the CTO | Enterprise Solutions Group

5. Focus of Cost Comparison
Leaf or Spine
Switch
Top of Rack
Switch
Area of
Focus
(Intra-
rack)

6. Assumptions Intra-rack connections Cable Extrapolation of costs
Maximum reach is 3 meters
All PHYs or modules use a four lane, 25 Gb/s interface
All links support 100 Gigabit Ethernet
Cable
Copper-based technologies cannot re-use existing cables
Optics would be able to use OM3/4 MMF or SMF
Extrapolation of costs
Existing technologies used as basis
Not considered
Board area
Power

7. Relative Cost Graph

8. Multi-Link Modules Extending Density Chris Cole Director, Transceiver Engineering Finisar Corporation 8

9. I/O Lane Densities Does 10G Lane density stops at 10G?
I/O Lane Rate
0.625G
2.5G
10G
25G
50G
Year
10GbE
16x
4x (3G) 1x
40GbE 4x
1x (40G)
100GbE
10x 2x
400GbE 8x
Does 10G Lane density stops at 10G?
Does 40G Lane density stop at 40G? 9

10. Port Densities NO Double Density SFP+: 48x 10GbE
Smaller SFP+ (mSFP+) was not successful
Is 48 the port limit for pluggable modules? NO
Multi-link I/O
OIF MLG
or IEEE PMA w/ Virtual Lanes
Multi-channel pluggable modules
MPO connector 10

11. I/O Lanes Extended 0.4x (MLG) 0.2x (MLG) 1.6x (MLG) I/O Lane Rate
Year
10GbE
16x
4x (3G) 1x
0.4x (MLG)
0.2x (MLG)
40GbE 4x
1.6x (MLG)
1x (40G)
100GbE
10x 2x
400GbE 8x 11

12. Port Densities Extended
Form
Factor
Electrical I/O
Rows
10GE
Ports
40GE
100GE
SFP+
1x10G
Double 48
N.A.
QSFP+
4x10G
176 44
QSFP28
4x10G 4x25G
Single 88 22
(MMF only)
CFP2
10x10G 4x25G
100 20 10
CFP4 MLG
4x25G
180 36 18
360 72
CFP2 MLG
8x50G
320 40
(10x 400GE)
4x50G
576
144 12

13. CFP2 Port Density Example
Ex. 400GbE-LR4 CFP2
8x50G I/O
duplex LC
WDM HOM
10 ports
4Tb/s line card
Multi-channel MLG CFP2s
8x50G I/O (same slot)
MPO
4x 100GbE (40 ports)
10x 40GbE (100 ports)
32x 10GbE (320 ports) 13

14. Pluggables vs. Socket Matt Traverso Engineering Manager Transceiver Module Group, Cisco Member Ethernet Alliance Board of Directors 14

15. Pluggable Universe Optics designed
Different optics/port types (reaches)
Point B
Point A 15

16. Socketed Universe Optics/port built onto card
Fixed optics/port types (reaches)
Point B
Point A
Opt.
Conn.
Optical
Engine
Socket
Optical
Engine
Opt.
Conn.
Socket
Example:
Avago Minipod 16

17. Logical / Protocol Interfaces
Generic Picture
Trading off the costs for
Cable vs. PMD
Reach Flexibility vs. Optimized Reach
Trading off Handling
Cables w/ “dongles” vs. connectorized cables
Logical / Protocol Interfaces
MAC
MAC
PMD
PMD
Cable
Physical Interfaces 17

18. Socket vs. Pluggable Why Socket Why Pluggable
Socketed design optimized for single reach & media
Fixed Port type
Pluggable design supports variety of reaches & media
Pluggable design enables field serviceability
Enables a pay as you grow model 18

19. Disclaimer
The views we are expressing in this presentation are our own personal views and should not be considered the views or positions of the Ethernet Alliance.