big data & IoT |
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enterprise , data centre , consumer , and mobile environments . The burden is exacerbated further in Western Europe as average broadband speeds begin to reach between 20Mbps and 36Mbps and IP traffic experiences a greater than 32 per cent compound annual growth rate ( CAGR ). While link aggregation strategies may be used as a temporary solution , they can be difficult to implement and costly to manage .
Fortunately , it ’ s the mission of groups such as the IEEE802.3 Industry Connections New Ethernet Applications Ad Hoc and the Ethernet Alliance to closely monitor how data trends are influenced by IoT , Big Data , and other developments . These groups are comprised of system and component vendors , industry experts , and university and government professionals who are committed to the success , expansion , and adoption of Ethernet technology . The results of their efforts are estimations , called ‘ roadmaps ’, for what future speeds may become available and when . For example , the 2016 Ethernet Alliance roadmap forecasts that greater than 1Tb / s speeds will be required to support large and hyperscale data centre deployments by 2020 ! While core networking speeds are converging on 100Gb / s today , clearly , 200Gb / s and 400Gb / s Ethernet solutions are critical milestones on the path to supporting this explosive bandwidth growth .
To that end , IEEE802.3bs ‘ IEEE Standard for Ethernet Amendment : Media Access Control Parameters , Physical Layers and Management Parameters for 200Gb / s and 400Gb / s Operation ’ is currently under development by the IEEE P802.3bs 200Gb / s and 400Gb / s Ethernet Task Force . This amendment , which is in the final Sponsor Ballot stage and anticipated to publish in
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December 2017 , will introduce seven new PHY specifications for deployment over singlemode and OM3 / OM4 multimode optical fibre cabling as follows :
• 200GBASE-DR4 : 200Gb / s transmission over four lanes ( i . e . eight fibres total ) of singlemode optical fibre cabling with reach up to at least 500m .
• 200GBASE-FR4 : 200Gb / s transmission over a fourwavelength division multiplexed ( WDM ) lane ( ie . two fibres total ) of singlemode optical fibre cabling with reach up to at least 2km .
• 200GBASE-LR4 : 200Gb / s transmission over a fourwavelength division multiplexed ( WDM ) lane ( ie . two fibres total ) of singlemode optical fibre cabling with reach up to at least 10km .
• 400GBASE-SR16 : 400Gb / s transmission over 16 lanes ( ie . 32 fibres total ) of multimode optical fibre cabling with reach up to at least 100m .
• 400GBASE-DR4 : 400Gb / s transmission over four lanes ( ie . eight fibres total ) of singlemode optical fibre cabling with reach up to at least 500m .
• 400GBASE-FR8 : 400Gb / s transmission over an eightwavelength division multiplexed ( WDM ) lane ( ie . two fibres total ) of singlemode optical fibre cabling with reach up to at least 2km .
• 400GBASE-LR8 : 400Gb / s transmission over an eightwavelength division multiplexed ( WDM ) lane ( ie . two fibres total ) of singlemode optical fibre cabling with reach up to at least 10km .
This well rounded solution set supports sophisticated wavelength division multiplexing ( WDM ) and more economical array ( ie . multi-fibre ) transmission strategies , multiple line speeds , and both singlemode and OM3 / OM4 multimode optical fibre media in order to offer customers a wide range of options to allow
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For the first time , a 500m reach solution will be available to cost effectively support greater than 100m high speed connections in large scale and multi-floor data centres . |
for balance between cost , transmission distance , and infrastructure complexity . In addition , the 200Gb / s and 400Gb / s solution set will also include the ability to support optional Energy Efficient Ethernet ( EEE ) capability .
Exciting
It is especially exciting that , for the first time , a 500m reach solution will be available to cost effectively support greater than 100m high speed connections in large scale and multi-floor data centres . Prior to the initiation of this amendment , high speed equipment connections in this critical reach range could only be made with very expensive singlemode WDM solutions . Both 500m 200Gb / s ( 200GBASE-DR4 ) and 400Gb / s ( 400GBASE-DR4 ) Ethernet operation will utilise an eight singlemode optical fibre transmission scheme , which supports four transmit fibres and four receive fibres each delivering either 50Gb / s or 100Gb / s , and the familiar IEC61754-7-1 MPO interface . Note that an MTP interface may be used as an alternate to the MPO interface and offers the additional benefits of improved mechanical and optical performance due to its more robust ferrule design . 200GBASE- DR4 and 400GBASE-DR4 are the first emerging applications to pair singlemode optical fibre cabling with MPO / MTP multi-fibre push on connectivity .
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June 2017 | 27 |