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Update on German Network forResearch & Education

Martin WilhelmDFN, Germany

wilhelm@dfn.deOctober 2002

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Contents

• DFN association: targets, objectives, finance• Today's technical platforms and services• Example of successful internat. collaboration• What is next?

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Targets of DFN association

• Higher Education and Research (universities, research institutes)

• Institutions with close relationship to the research and education community

• Research departments of industry• Government agencies

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Objectives of DFN association

• Provision of nat. and internat. connectivity by means of a leading edge infrastructure (G-Win)

• Bundling community requirements• Testbeds for next generation network

technologies• Promotion of new applications• Organization for international collaboration

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Finance of DFN association

• non-profit organization• federal government subsidizes start-up• Operational costs (capacity, equipment,

personnel, services ...) must be fully covered by income: charges for services

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Transport Platform

• Toolkit of SDH/WDM lines from Dt. Telekom: configurable topology, increasing bandwidth

• 27 network nodes operated by DFN

• Used for IP, ATM, GigE links, DFNVC, ...

• Automatic SLA evaluation of 15min BER

2001 2002 2003 2004104 168 568 1236

maximum STM1 (OC3) units per year

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G-WiN: Today‘s Topology

Stuttgart

Leipzig

Berlin

Frankfurt

Karlsruhe

Garching

Kiel

Braunschweig

Dresden

Aachen

RegensburgKaiserslautern

Augsburg

Bielefeld

Hannover

Erlangen

Heidelberg

Ilmenau

Würzburg

Magdeburg

Marburg

Göttingen

Oldenburg

Essen

St. Augustin

Core Node10 Gbit/s2,4 Gbit/s2,4 Gbit/s622 Mbit/s

as of October 2002

Rostock

Global Upstream

GEANT

Hamburg

Topology computed, based on Operations Research methods.Optimised for low hopcount, low cost, high resilience byuse of actual traffic matrices

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Structure of Routers

Level-2 nodeLevel-1 node

CR: Core RouterAR: large Access Routerar: small Access RouterKR: Customer Router

Level-2 node

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Some figures of DFN Internet• approx. 600 connected sites • ~ 800 TB/month network throughput• 95% of all traffic is IP• traffic ~ doubles every year• Global Upstream 5 Gigabit/s• connected to GTREN @ 2,5 Gigabit/s via

GEANT

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Problem tracking at a G-WiN core node

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Services provided

• DFNIP: IP-service (national, international, NREN-to-NREN as well as Global Upstream)

• DFNConnect: Point-to-point within network• DFNATM: “Legacy” ATM• DFNVC: Managed Video Conference Service• DFN@home: Dial-in (ISDN, xDSL) with pro-

vision of IP-addresses from home institution

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Collaboration Duke University - DFN

Telepresence across Internet2 networks(details at http://www.fuqua.duke.edu/admin/it/telepres.htm)

Global Conference System, connectingDurham, NC and Frankfurt, Germany.No noticeable latency, video and audio in perfect synch

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Electronic Ribbon Cutting Procedure

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What is next?2003: More 10 G links in core2004: Call for tender: new transport platform

Growing demand for real-time servicesInterworking optical layer / IP ?New applications and services