janet6 online briefing - webmedia.company.ja.net

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October 2012 Rob Evans Jeremy Sharp Janet6 online briefing

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Page 1: Janet6 online briefing - webmedia.company.ja.net

October 2012 Rob Evans Jeremy Sharp

Janet6 online briefing

Page 2: Janet6 online briefing - webmedia.company.ja.net

1.  Procurement and project update Jeremy Sharp Head of Strategic Technologies, Janet 2.  Infrastructure design Rob Evans Chief Technical Advisor, Janet 3.  Questions and Answers Jeremy Sharp & Rob Evans will be joined by Neil Shewry, Janet6 Project Manager

Janet6 update: Topics

Page 3: Janet6 online briefing - webmedia.company.ja.net

Summary to date

•  Janet6: Project to replace the UK wide Janet backbone, SuperJanet5

Requirements gathering & analysis

2011

Procurement •  Fibre infrastructure •  Optical transmission equipment

Oct 2011 to Sept 2012

Rollout Sept 2012 to April 2013

Transition SJ5 to J6 May 2013 to July 2013

SJ5 ‘turned-off ’ Oct 2013

SuperJanet5: 2006 to 2013

Page 4: Janet6 online briefing - webmedia.company.ja.net

•  Fibre infrastructure contract signed: 31st July 2012

•  Scottish & Southern Energy Telecoms (SSET) •  10 year contract •  £30M

•  Optical transmission contract signed: 6th September 2012

•  Ciena Inc. •  Supply and 5 years support agreement •  £12.8M

Janet6 status – Procurement phase complete

Page 5: Janet6 online briefing - webmedia.company.ja.net

 

•  To deliver a highly reliable and secure network –  Careful design choices –  Carrier class network equipment & infrastructure –  Strict SLA’s –  Management by Janet NOC

•  To provide a network that is flexible in meeting future demand –  Design enable capacity scaling at controllable cost

•  To provide a network that is more agile in dealing with change –  Management by Janet NOC –  Close working relationship with industry partners

Meeting your requirements

Page 6: Janet6 online briefing - webmedia.company.ja.net

Infrastructure design

Rob Evans Chief Technical Advisor, Janet

Page 7: Janet6 online briefing - webmedia.company.ja.net

Infrastructure Design: Fibre

Page 8: Janet6 online briefing - webmedia.company.ja.net

Backbone Fibre

Page 9: Janet6 online briefing - webmedia.company.ja.net

Backbone Fibre

•  New East-West link between Erdington (Birmingham) and Lowdham (Leicester) –  More resilience –  Shorter reroutes in case of failure

•  Different topology in the south –  Single loop of fibre through London and Bristol

Page 10: Janet6 online briefing - webmedia.company.ja.net

Backbone and Regional Networks

Page 11: Janet6 online briefing - webmedia.company.ja.net

Backbone and Regional Fibre

•  Same principle of two diverse fibre pairs to each region. •  Fewer collector arcs picking up multiple regions •  All fibre is G.652

–  Older specification than G.655, but works better with modern transmission systems

Page 12: Janet6 online briefing - webmedia.company.ja.net

I could go into more detail…

…but how good is your eyesight?

•  >5,700km fibre •  78 PoPs with optical

equipment •  232km unamplified

subsea span •  119km unamplified land

span •  28 100GE circuits •  130 10GE circuits

Page 13: Janet6 online briefing - webmedia.company.ja.net

Backbone Points of Presence

•  Vacating the Verizon Business PoPs –  Except for small presence in Glasgow and Reading due to Scottish

Schools’ network and TVN •  Existing Provider-Neutral PoPs

–  Telehouse North –  Telecity Harbour Exchange –  Telecity Manchester

•  Moves onto the backbone –  Scolocate

•  Moves onto the fibre backbone (more later)

•  New Provider-Neutral PoPs –  Telecity Powergate (West London) –  Telehouse West –  Leeds (AQL, Salem Church)

Page 14: Janet6 online briefing - webmedia.company.ja.net

Other Points of Presence

•  Transmission PoPs –  Couple of racks, multiplex wavelengths from regional fibres onto the

backbone –  Provided by SSET

•  In-Line Amplifier PoPs –  Single rack, small amplifier shelf –  Provided by SSET

Page 15: Janet6 online briefing - webmedia.company.ja.net

PoP Issues

•  Power – we need lots of it –  Routers have two Power Entry Modules (PEMs) –  Each PEM requires six -48V DC feeds with 60A breakers –  2-4kW more for the transmission equipment –  Lightpath routers, management routers and switches –  Electrical guys don’t seem to like aggregating capacity as easily as

router guys

Page 16: Janet6 online briefing - webmedia.company.ja.net

Infrastructure Design: Transmission

Page 17: Janet6 online briefing - webmedia.company.ja.net

Ciena 6500

•  ROADM –  Reconfigurable Optical Add/Drop

Multiplexer •  Wavelength Selective Switch

–  Microelectromechanical System (MEMS) •  Diffraction grating •  Lens •  Servo-actuated mirrors

–  2:1 or 9:1 modules allow incoming DWDM channels to be split over 2 or 9 outgoing fibres

Page 18: Janet6 online briefing - webmedia.company.ja.net

All mirrors and no smoke (unless it breaks)

Page 19: Janet6 online briefing - webmedia.company.ja.net

Other components…

•  Transponder –  Takes 100GE from router and converts it to DWDM 100Gbit/s signal

•  Muxponder –  Carries, e.g., multiple 10GE circuits on 40 or 100Gbit/s signal

•  Line-side card –  Dual polarisation quadrature phase shift keying –  >100Gbit/s (including framing) within 50GHz of optical spectrum

Page 20: Janet6 online briefing - webmedia.company.ja.net

Transmission Design: Dispersion Compensation

•  Dispersion Compensation or not? –  Uses ‘doped’ fibre to compensate for chromatic dispersion –  Used on SJ5 and most existing DWDM networks

•  ‘Coherent’ receivers for higher-speed circuits are adversely affected by the presence of dispersion compensation

•  Omit dispersion compensation and it is hard to carry lower speed signals –  Limited reach –  Guard bands

Page 21: Janet6 online briefing - webmedia.company.ja.net

Transmission Design: Dispersion Compensation

•  Chose to drop dispersion compensation –  No native 10GE transmission –  All 10GE circuits are carried over 40Gbit/s or 100Gbit/s carriers –  Very few parts of the network where we needed just one or two

10GE circuits –  Maximises reach of 40Gbit/s and 100Gbit/s circuits

Page 22: Janet6 online briefing - webmedia.company.ja.net

Transmission Design: OTN Switching

•  A bit like SDH (or ATM?)… –  Build optical capacity between nodes –  Put lower-speed circuits into OTN containers –  Switch them between points on the network

•  Discussed during competitive dialogue –  Not available from a wide range of shortlisted suppliers –  Expensive –  Difficult to see the use when we also have the Janet Lightpath

(EoMPLS) layer

Page 23: Janet6 online briefing - webmedia.company.ja.net

Transmission Design: ‘Thin’ optical layer

•  Existing transmission systems convert optical signal received from router to electrical, then reconvert it to optical again to transmit. –  Each circuit needs four “client side” optics (XFPs, CFPs), plus the

transmission-side lasers

•  If router could transmit long-haul signal directly, transmission equipment just needs to balance levels and multiplex. –  Should be cheaper –  Move framing, FEC (error correction) and encoding to router

interfaces •  Starting to arrive for 10G •  Not there for 100G

Page 24: Janet6 online briefing - webmedia.company.ja.net

IP topology

Page 25: Janet6 online briefing - webmedia.company.ja.net

IP topology

•  Remember that change in PoPs? –  Moving routers from PoP to PoP whilst still maintaining a service

would have been … challenging. –  One-night migration for all of Janet?

•  Need to upgrade from Juniper T-1600 to T-4000 –  Higher port density

•  2x100GE per slot •  24x10GE per slot

–  Significantly lower per-port 100GE price •  New chassis and hand old ones back after migration

–  Except ‘fixed’ PoPs (Telecities, Telehouses) •  IP, IPv6, Unicast, Multicast •  Looking at L2VPNs

Page 26: Janet6 online briefing - webmedia.company.ja.net

IP topology

Page 27: Janet6 online briefing - webmedia.company.ja.net

Lightpath Topology

Page 28: Janet6 online briefing - webmedia.company.ja.net

Lightpath topology

Page 29: Janet6 online briefing - webmedia.company.ja.net

Lightpath changes

•  Increase the bandwidth between the backbone nodes to 100GE –  If client optics are in place, allows us to carry 10GE lightpath circuits

with only software configuration on the core. •  Topology reflects what is currently required

–  If there is a need for lightpaths elsewhere, talk to us!

Page 30: Janet6 online briefing - webmedia.company.ja.net

Questions & Answers

•  Jeremy Shar p •  Rob Evans •  Neil Shewry