Long%20haul%2010G%20Ethernet

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Long haul 10G Ethernet

• Dark fiber tests in Denmark
• Presented by Mikkel Olesen, CERN

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• Part of the IST ESTA project (Ethernet Switching
  at 10G and Above)
• Project members
• COM institute at Technical University of
  Denmark
• CERN in Geneva
• BATM in Israel

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Agenda

• Goals
• DAREnet dark fibers in Denmark
• Equipment
• Lab experiments at COM/DTU
• Field tests, used setups and results
• Conclusion
• Future work and use
• Questions?

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Goals

• Examine the possibility to use standard 10G
  Ethernet LAN equipment for long-haul WAN
  transmission
• Using DAREnets 250km SMF link between Odense and
  Lyngby
• If possible find a setup that has a BER below
  1E-12 which is the 802.3ae objective
• Use standard NICs and aggregating switch's to
  verify link with real Ethernet traffic
• Measure the setups power penalty

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DAREnet fiber in Denmark

• The 252 km of standard SMF dark fiber between
  Odense and Lyngby
• Includes three points for possible amplification,
  filtering etc. in Nyborg, Næstved and Taastrup

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Equipment

• BATM T6 switch
• Including 10G Uplink module developed at CERN as
  part of ESTA
• Optillion TOP 5010-SC Xenpak transceiver
• 1550 nm optics with maximum reach of 40 km
• Includes IEEE802.3-2000 PMD BIST capability for
  BER measurements
• Optical amps and filters

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COM lab setup
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Field tests - 1

• Setup using pre-amp at receiver
• 4 amps in total per link
• 3 x 80 km DCF (Dispersion Compensating Fiber)
• Achieved BER lt1E-15 !
• Limited by time shortage

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BER curves
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Field tests - 2

• Setup without using pre-amp at receiver
• 3 amps in total per link
• 3 x 80 km DCF
• Achieved BER lt1E-12
• Shortage of time limited the experiments on this
  setup, BER could likely be improved

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Picture - Lyngby
PC
Filter and attenuator
DCF
Amps
Xenpak
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Picture Næstved and Odense
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Conclusion

• Successfully used standard 10G Ethernet LAN
  equipment to transmit over 250km of SMF dark
  fiber (including optical amplification and DCF)
• Setup meets 802.3ae objective with a BER of
  1E-12, best result is below 1E-15
• Transmitted full-duplex 8 Gb/s real Ethernet
  traffic using 16 x 1 Gb/s NICs and aggregating
  switch's
• Measured setup power penalty at 1E-12 to be 2.5
  dB

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Conclusion cond.

• The successful results prove the possibility to
  use low-priced Ethernet LAN equipment for
  long-haul connections

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Future work and use

• Initial tests show the possibility to extend the
  reach even further
• Experiments could for example make use of the
  dark fibers continuing to Århus and Aalborg
• A 10 Gb/s link between SDU in Odense and DTU in
  Lyngby could for example be valuable as a
  GRID-to-GRID connection

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Questions?
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Back-to-back sensitivity measurement

• Used to determine the power penalty for the
  demonstrated setup