The UKLight Network Dr John S. Graham ULCC

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

Components Equipment –SDH & MSPP –Ethernet switching Circuits –National –International Co-location Facility

North Wales MAN LeNSESWERN Kentish MAN NorMAN YHMAN EMMAN EastNet LMN South Wales MAN TVN MidMAN Northern Ireland NNW C&NL MAN GlasgowEdinburgh WarringtonLeeds ReadingLondon BristolPortsmouth EaStMAN UHI Network Clydenet AbMAN FaTMAN

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

GLIF World Satellite Image

GLIF Atlantic Satellite Image

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

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

The UKLight-Controlled Layers Physical Data Link Network Transport Session Presentation Application Physical Regenerator Multiplexer Path Fibre WDM SONET/SDH

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

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. Time Division Multiplexing (TDM) VC-4-64c (10 Gb/s)

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!

Bandwidth Categories

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.

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

Circuits Currently Established UCL (HEP) –to Fermi National Accelarator Laboratory –to UIC Co-Located StarLight UCL (Chemistry) to TeraGrid Manchester (HEP) to CERN