2.6 abc of direct attached cables
DESCRIPTION
ABC of Direct Attached CablesTRANSCRIPT
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The ABC of Direct Attach Cables
Thomas Ko, RCDD Product Manager
TE Connectivity
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Network Speed and Technology
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10/40/100 Gbps the transition is occurring right now
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What are Customers Saying about their 10/40/100 GbE Migration Plans?
10G 40G 100G
Year 100 Mbps 1G 10G 40G 100G
2011 23% 25% 25% 17% 9%
2013 9% 18% 24% 26% 23%
Source: BSRIA Global Data Center End User Study, 2011. 335 respondents in six countries
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Copper- and Fiber-Based Equipment Interconnect Options Will Continue
Connection Speed:
Server speed adoption (x86 million server units)
LC MMF (with Transceiver)
SFP+ Twinax QSFP+ Twinax CXP Twinax
10G 40G 100G
0
5
10
15
20
25
30
2015 2014 2013 2012 2011 2010 2009 2016 2017 2019 2020 2018
10G
100G
1G
40G
MPO 12-F MMF (with Transceiver)
MPO 24-F MMF (with Transceiver)
Cat 6A
Fiber
Copper
LC Multimode
Fiber
SFP+ Twinax Copper
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How They Connect
Types of interfaces for Ethernet Copper - RJ45 Fiber : Build-in modules LC / SC / MPO Pluggable Transceivers Modules
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Introducing Pluggable Modules
OR
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Example Picture from Cisco manual
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Pluggable Transceivers
Some of the commonly available pluggables
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Optical transceiver module
Optical cable
Active optical cable
Direct attach copper cable
Lightpipe Heatsink and clip
PT Connector
Cage
Components of a Pluggable Interface
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Standards Drive the Market for High Speed interfaces
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Connectivity To Support Short Reach DC Applications?
XEN
PAK X2
XFP
SFP+
QSF
P+
CXP
CFP
(1st. G
ener
atio
n)
1 x 10Gb/s SC Duplex
40Gb/s 100Gb/s 40 / 100Gb/s 10Gb/s
1 x 10Gb/s SC Duplex
1 x 10Gb/s LC Duplex
4 x 10Gb/s MPO/MTP
4 x 10Gb/s 10 x 10Gb/s MPO/MTP
10 x 10Gb/s MPO/MTP
1 x 10Gb/s LC Duplex
~ 2001 Today
Direct Attach Twin Ax Cu to 15m
RJ45 Twisted Cu Pair
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Small Form-factor Pluggable (SFP)
Supports applications up to 4 Gb/s Cages available in single port, ganged, and stacked configurations Stacked cages have integrated connectors, press-fit in one process step Uses 20 position PT (Pluggable Transceiver) connector Direct attach copper cable assemblies for lower cost with short reach
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20121129
page 14 /
SFP+
Supports applications up to 10Gb/s, backward compatible with SFP Cages offered in single port, ganged, and stacked configurations Elastomeric gaskets and springs for EMI containment Uses enhanced 20 position PT connector Direct attach copper and fiber cable assemblies offered
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20121129
page 15 /
QSFP+ (Quad SFP)
4-channels in one interface, providing 3-4X density of XFP, SFP+ Up to 10 Gb/s per channel, total 40G interface Cages offered in single port and ganged configurations Heatsinks and lightpipes available Uses 38 position EVERCLEAR connector Direct attach copper and PARALIGHT optical cable assemblies offered
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High density up to 12X, supporting 10Gb/s per channel
Adopted for 120G InfiniBand and 100G Ethernet
84 position dual row connector interface
Designed to support copper and optical links
CXP
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Direct Attach Cable Assemblies - Copper
Support higher data rates than traditional copper interfaces from 4Gbps to 10Gbps per channel
Interchangeable and hot swappable with fiber optic modules
Cost effective solution over optical transceivers and cables for short reach applications
Support multiple protocols - Gigabit & 10G Ethernet; 8G FC; FCoE; InfiniBand SDR, DDR & QDR
CXP, SFP+, QSFP, XFP, SFP
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An alternative to optical transceivers - eliminates the separable interface between transceiver module and optical cable
Meets Small Form-factor (SFF) standards
No Equipment Upgrades
Up to 40Gb/s throughput with QSFP+
100 meters plus reach
Low latency (840ps + fiber prop delay)
No EMI Optical Cable Advantages
1/3 Size of Copper Cable 3.0 mm O.D. 1/3 Weight of Copper Cable
Direct Attach Cable Assemblies - Fiber
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Applications: High Speed Direct Attach Cable Assemblies
High Speed I/O applications in storage, networking and telecom markets
Switches, servers, routers, network interface cards (NICs), Host Bus Adapters (HBAs)
High Density and High Data Throughput
Direct Pluggable Cables include
Copper Cable Assemblies
Fiber Optic Cable Assemblies
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Application: Data Center
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Equipment Distribution Areas
Entrance Room
Main Distribution Area Horizontal
Distribution Area Equipment Distribution Area
Direct Attach Cable Assemblies Fiber Systems
Optical Jumpers Trunk Cables
Copper Systems
Cat 6A 10 Gigabit
Cat 6 Gigabit QSFP SFP+
Active Optical Cable
Assembly
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ToR Connectivity Option Direct Attach Cables
Connects active platforms with no patching up to 15m.
QSFP+ and SFP+ cords to switch, server and router for rack connections
For speeds of up to 10G/s - SFP+ cables
For speeds of up to 40G/s QSFP+ cables
For distances greater than 15m fiber optic Direct Attach cables can be used.
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Data Center DAC Application
Low Cost for Short Reach SFP+ Direct Attach the
optimal solution for short reach 10 G interconnects. Through aggregation, SFP+ Direct Attach also provides a low cost upgrade path for higher speed (40 G and 100 G) interconnects.
Best apply ToR, and even EoR
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Reach of DAC Cables
For cables that operate at a data rate of 10Gb/s per differential pair the typical reach for 24 AWG cable is about 7 meters, for active copper cables a reach of about 15 meters can be achieved.
For some applications customers desire smaller wire gauge for improved flexibility, which shortens the reach
For new standards that are in process of being developed to support data rates of 25 to 28 Gb/s per differential pair the targeted reach is about 5 meters for 24 AWG cable (IEEE, Fibre Channel, InfiniBand, etc)
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40GBE over Copper
QSFP Modular Interface Included in 802.3ba standard 8-pair Twin-ax Cable Assembly 7m (23ft) reach Similar application space as 10G
SFP+Cu for ToR/POD layouts Larger OD vs. SFP+
QSFP Cable Assembly
QSFP OD: 0.36in/9.2mm (24AWG) SFP+ OD: 0.22in/5.6mm (24AWG)
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100GBE over Copper
20-pair twinax, approx 0.5 in. OD
CXP Form Factor
CXP Modular Interface (similar to 12X IB)
20-pair twin-ax cable assembly Cable is large approx 0.5in (12mm)
OD 7m (23ft) reach Under research to understand
market need May transition to 25G x 4 in QSFP
form factor in future
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40GBE over Multimode Fiber
QSFP transceiver with 12 fiber MTP/MPO connector Uses outside 4 fibers on each side for Tx and
Rx
OM3: 100m, OM4: 150m QSFP Active Optical Cable
QSFP SR Transceiver
MTP Cable Assembly 01
12
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100GBE over Multimode Fiber
100G over MMF requires CFP / CXP module
Most CFP will use 24 fiber MTP interface
CXP for Short Reach application CFP for Longer Reach application
10GBASE-SR10 CFP with 24 fiber MTP Interface
CXP Interface
01
24
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Hybrid (QSFP / SFP+)
Release and Roadmap Dates
Application Data Rate
Infiniband Ethernet
QDR (10G) 10GBASE-SR 40GBASE-SR4
Product Type: Active Optical Cable
QSFP (40GbE) to 4 x SFP+ (10GbE) Fan Out
Microsoft is in the process of connecting their servers with 10GbE fiber connections. With the number of connections they require, they are opting to purchase switches with 40GbE blades and splitting the connections into four individual 10 Gig channels.
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40G 100G Ethernet Reach 1m
Backplane 7m copper cable assembly
100m OM3/ 150m OM4
10km SMF 40km SMF
40 Gigabit Ethernet PMD Name 40GBASE-KR4 40GBASE-CR4 40GBASE-SR4 40GBASE-LR4 Signaling 4 x 10Gbps 4 x 10Gbps 4 x 10Gbps 4 x 10Gbps Media Backplane Twin-ax Parallel MMF Duplex SMF Module QSFP QSFP CFP/QSFP
100 Gigabit Ethernet PMD Name 100GBASE-CR10 100GBASE-SR10 100GBASE-
LR4 100GBASE-
ER4
Signaling 10 x 10Gbps 10 x 10Gbps 4 x 25Gbps 4 x 25Gbps Media Twin-ax Parallel MMF Duplex SMF Duplex SMF Module CXP CFP or CXP CFP CFP
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100GbE Market Overview
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Fibre Channel Industry Association Roadmap
page 33 / December 2011
FC used throughout all applications for Fibre Channel infrastructure and devices, including edge and ISL interconnects. Each speed maintains backward compatibility at least two previous generations (I.e., 8GFC backward compatible to 4GFC and 2GFC) Line Rate: All FC speeds are single-lane serial stream Dates: Future dates estimated
1GFC 200 1.0625 1996
2GFC 400 2.125 2000
4GFC 800 4.25 2003
8GFC 1600 8.5 2006
16GFC 3200 14.025 2009
Product Naming
Throughput (MBps)
Line Rate (GBaud)
T11 Spec Technically Completed
(Year)
Market Availability
(Year)
1997
2001
2005
2008
2011
32GFC 6400 28.05 2012
64GFC 12800 TBD 2015
128GFC 25600 TBD 2018
2014
Market Demand
Market Demand
256GFC 12800 TBD 2021
512GFC 25600 TBD 2024
Market Demand
Market Demand
SFP
SFP
SFP
SFP+ SFP+
LC Multimode jumper (with Transceiver)
SFP+, QSFP+
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InfiniBand Trade Association Roadmap
CX4 QSFP
SFP LC Multimode jumper + SFP Transceiver
MPO Multimode + QSFP Transceiver
CXP
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Summary
DAC cables are a cost effective, proven solution for interconnecting networking applications
Use the same port as an optical transceiver, but with significant cost savings and power savings in short reach applications
The products are continuing to evolve to meet industry needs of higher data rates and densities with low power consumption
Ethernet, Fibre Channel, and InfiniBand standards are increasing in speed to support this increase
The ABC ofDirect Attach CablesNetwork Speed and TechnologySlide Number 3What are Customers Saying about their 10/40/100 GbE Migration Plans?Copper- and Fiber-Based Equipment Interconnect Options Will ContinueHow They ConnectIntroducing Pluggable ModulesExample Picture from Cisco manual Pluggable TransceiversSlide Number 10Slide Number 11Connectivity To Support Short Reach DC Applications?Small Form-factor Pluggable (SFP)Slide Number 14Slide Number 15Slide Number 16Direct Attach Cable Assemblies - Copper Direct Attach Cable Assemblies - FiberApplications: High Speed Direct AttachCable AssembliesApplication: Data Center Equipment Distribution AreasToR Connectivity Option Direct Attach CablesData Center DAC ApplicationReach of DAC Cables40GBE over CopperSlide Number 2740GBE over Multimode Fiber 100GBE over Multimode FiberSlide Number 3040G 100G Ethernet100GbE Market OverviewFibre Channel Industry Association RoadmapInfiniBand Trade Association RoadmapSummary