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London Internet Exchange

London Internet Exchange. Keith Mitchell, Executive Chairman. JPIX Meeting, July 2000. LINX - History & Status. Started October 1994 Neutral, not-for-profit Now largest exchange in Europe 4th or 5th In world 100+ ISP Members ‘World Class’ facility Model for other IXPs. LINX Objectives.

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London Internet Exchange

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  1. London Internet Exchange Keith Mitchell, Executive Chairman JPIX Meeting, July 2000

  2. LINX - History & Status • Started October 1994 • Neutral, not-for-profit • Now largest exchange in Europe • 4th or 5th In world • 100+ ISP Members • ‘World Class’ facility • Model for other IXPs

  3. LINX Objectives • Primary Objective • “To provide efficient interconnectivity for the UK Internet” Realise this by aiming to keep 100% of UK Internet traffic in the UK • Secondary Objective • “To promote the interests of its members” • Latter is only done on specific issues, where there is formal approval of strong consensus among members

  4. LINX Principles • Neutral locations • Not owned by ISPs or telcos • Neutral management • By association of members • Neutral operation • By dedicated autonomous staff • Should not compete with members’ services • No retail members, only ISPs • Well-funded quality facilities and infrastructure

  5. Principles (continued) • “Natural” national monopoly should be: • Not for profit • Efficient • Accountable • Routing policy is purely a matter for members, though some constraints: • Members must peer with at least 1 other • Direct bilateral connections also permitted

  6. LINX Members Cumulative 1994 - 2000

  7. 1 Members by Country Total = 109

  8. Network Topology

  9. Copper Patch Rack - THN

  10. Infrastructure Update (cont’d) • Switch Migration: • Now completed • Summit48 removed replaced by BD - greater port density (eg: max 64 Gige ports) • Telehouse North is still full • members gradually moving kit out, recovering space • Still requirement to increase Port Density • PE/Alcatel no longer suitable, due to gig density and lack of hardware development • New Switches - more later

  11. Telehouse North

  12. Gigabit Ethernet MAN • First deployed: • inter-switch 98Q4 • inter-site 99Q1 • Available to members: • pilot 99Q4 • service 00Q2 - 8 members • higher than forecast demand as members break the 100Mbps barrier • Total LINX traffic peak ~2.5Gbps

  13. Initial LINX Locations • From October 94 at Telehouse • Rewarding relationship for both parties  • But around 1997, Telehouse mostly full  • Also resilience concerns • Went out to tender for second site • 3 bids • But winning bidder pulled out 

  14. Model Evolution • Re-tendered • Commissioned 2nd Primary site with winners Telecity in 1998 • High quality of bids • Major co-lo provider growth in London Docklands & City area • Interest from 7 other CLPs • Requirements from LINX Members • Created ‘Expansion Site’ plan

  15. Thesis • IXPs originally providedefficient, co-ordinated connectivity through co-operation between ISPs • To evolve they must provide efficient, co-ordinated connectivity between CLFs & ISPs through co-operation between CLPs and ISPs

  16. The Alternative  • Multiple commercially competing CLFs per metro area will each have own IXP • Each ISP will need (either/both): • a presence at many CLFs • many private bi-lateral interconnects • The latter do not scale well across either full or many buildings

  17. The Strategy • Build an: • efficient • co-ordinated • neutral • not-for-profit dark fibre IXP between as many CLFs as possible

  18. The Strategy • Make IXP connection a: • single location • cheap • simple • facility independent service option for all ISPs

  19. CoLo Technical Criteria • Number of carriers with fibre into facility • Size of facility • Number of engineers, 24x7 operators • Security measures • Separate LINX cage located centrally • Fire protection system • Power: capacity, UPS, generators • Air conditioning • Verify by site visit

  20. Current Status • Primary sites at: • Telehouse, TeleCity • LINX purchased IRU on dark fibre to implement Gigabit MAN • Q1 2000: • Redbus Interhouse • Telehouse Eastern extension • Q2 2000: • Guardian DR, InterXion, IX Europe • equipment ready, waiting for fibre

  21. Conclusions • Have learnt lessons: • Physical infrastructure build quite painless • Contractual/legal issues very time consuming • New entrants to colo market a little over optimistic • Need to build relationship and trust with & between many CLPs • Each one gets easier 

  22. The Future • Developing 'Build your own exchange site' handbook • Open to further Expansion Site bids • Provisional approval from LINX members to work with CLFs: • outside London M25 • not connected to existing sites

  23. Further Information • http://www.linx.net • info@linx.org • +44 1733 207700 • Fax 1733 353929

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