The German-Japanese Youth Exchnage Badges a Known and Unknown Oddity by Wilhelm P.B.R. Saris
1 Update on German Network for Research & Education Martin Wilhelm DFN, Germany October 2002.
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Transcript of 1 Update on German Network for Research & Education Martin Wilhelm DFN, Germany October 2002.
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Update on German Network forResearch & Education
Martin WilhelmDFN, Germany
[email protected] 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