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Dr John S. Graham ULCC johng@nosc.ja

Dr John S. Graham ULCC johng@nosc.ja

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Dr John S. Graham ULCC johng@nosc.ja

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  1. The UKLight Network Dr John S. Graham ULCC johng@nosc.ja.net

  2. Bandwidth ‘Channels’ • Large (1 Gb/s) • Point-to-Point • Connection-Oriented • Layer II switched • Uncontended • Persistent • Established Manually

  3. Components • Equipment • SDH & MSPP • Ethernet switching • Circuits • National • International • Co-location Facility

  4. UHI Network AbMAN Clydenet Northern Ireland FaTMAN EaStMAN C&NL MAN NNW Glasgow Edinburgh NorMAN North Wales MAN YHMAN Warrington Leeds EMMAN MidMAN EastNet Reading London Kentish MAN TVN Bristol Portsmouth LMN South Wales MAN SWERN LeNSE

  5. Warrington Manchester Cambridge Reading St Pancras ULCC Chicago Amsterdam Imperial College UCL

  6. GLIF World Satellite Image

  7. GLIF Atlantic Satellite Image

  8. Infrastructure – CoreDirector CI • Up to 16 x STM-64 or 64 x STM-16 • 160 Gb/s non-blocking switching capacity • Groom traffic down to individual VC-3

  9. Infrastructure – MetroDirector K2 • Gigabit Ethernet: • 6 physical and 10 PoS ports • 8.5 G switching capacity • 2.5 G cross-connect capacity • Fast Ethernet: • 24 physical and 4 PoS ports • 4.9 G switching capacity • 2.5 G cross-connect capacity

  10. 7 Application 6 Presentation 5 Session 4 Transport Path 3 Network Multiplexer 2 Data Link SONET/SDH Regenerator 1 Physical WDM Physical Fibre The UKLight-Controlled Layers

  11. SONET/SDH • SONET • ANSI Standard • Deployed in North America • STS-1 = 51.840 Mb/s • SDH • ITU-T Standard • Deployed throughout rest of world • STS-3c/VC-4 = 155.52 Mb/s

  12. VC-4-64c (10 Gb/s) Time Division Multiplexing (TDM) • Allows multiple independent logical circuits to be provisioned over one physical circuit: • 4 x VC-4-16c (2.4 Gb/s) • 16 x VC-4-4c (622 Mb/s) • 64 x VC-4 (155 Mb/s) • 192 x VC-3 (51 Mb/s) • Time-slots are pre-allocated to the channels, rather than arbitrated on a per-time slot basis.

  13. Transporting Ethernet • Currently use non-standard contiguous concatenation VC-4-8C (1244 Mb/s) per gigE channel. • Maximum 8 gigE channels per STM-64 • New technology soon: • GFP-F • VCAT • LCAS • Will allow 9 transatlantic gigE channels!

  14. Bandwidth Categories

  15. Routing is Not Mandatory! • High bandwidth circuits are affordable. • Router linecards are expensive and becoming more so. • Optical = 10% Switching = 10% Routing • High bandwidth, persistent circuits connecting a few sites require switching gear. • Most switching should be Layer I.

  16. How to Connect • Circuit to UKLight PoP • UCL • Imperial College • Over Routed Development Network • Manchester (temp) • Co-Lo at ULCC

  17. Circuits Currently Established • UCL (HEP) • to Fermi National Accelarator Laboratory • to UIC Co-Located Servers @ StarLight • UCL (Chemistry) to TeraGrid • Manchester (HEP) to CERN