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Evolution of Network Services in a Large University an Italian case study: Padova

Evolution of Network Services in a Large University an Italian case study: Padova. Franco Bombi University of Padova Alberto de Petris Infostrada. Padova University. Founded 1222 13 Faculties 33 undergraduate courses 41 graduate courses 2.191 faculty members and researchers

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Evolution of Network Services in a Large University an Italian case study: Padova

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  1. Evolution of Network Services in a Large Universityan Italian case study: Padova Franco Bombi University of Padova Alberto de Petris Infostrada

  2. Padova University • Founded 1222 • 13 Faculties • 33 undergraduate courses • 41 graduate courses • 2.191 faculty members and researchers • 1.861 technical and administrative staff • 63.305 undergraduate and graduate students

  3. The main University building: “Il Bo - The Ox”

  4. The telecommunications challenge • From the historical and geographical point of view • University distributed over several small town in the Veneto Region • Several University buildings spread in the old town • Old buildings represent an important historical heritage the University is proud to preserve • From the technical point of view • Existing telecom infrastructures built over time represent a legacy more then an asset • Separate facilities for research, teaching, administration • Different proprietary solutions in each area

  5. Fall 1997 plans • Main Objectives • 10 fold increase of the University net capacity • unique phone numbering scheme • integration of voice and data infrastructure • Boundary conditions • new telecom low (effective 1.1.1998) • new national research net planned (GARR-B) • Keep running costs constant

  6. New infrastructure design goals • One stop buying as far as feasible • Outsourcing of main transport infrastructure • Maintain full responsibility of net routing policies • Avoid the use of switching other then TCP/IP at least for data • Migrate all applications to TCP/IP at the backbone level • freedom to use proprietary solutions at the departmental level • use of STUN and other tunneling techniques

  7. Spring 1998 negotiations • February 1998: first entrants obtain license for public service • Only Telecom Italia (incumbent) and Infostrada (entrant) willing to provide • transport services in the urban area (both data and voice) • transport of voice at the national and international level • supply, installation, maintenance and run in of all the backbone routers

  8. Summer - Fall 1998 limited call for tender action • As a result of spring negotiation we entered in a limited tender action with Telecom Italia and Infostrada • at the time competition was just an absolute novelty for all of us • Telecom Italia was bound by law and by its own monopoly structure not to offer competitive solutions • Infostrada offer was more aggressive although they had no access to the local loops (still they don’t) • Infostrada at the end won the bid on price and performance considerations • Three year contract signed: January 1999 • Summer 1999 the new net was partially operational • Fall 1999 the new net was fully operational

  9. Multiservice net structure • Transport - common to voice and data • 2 Mbit/s (mainly wireless) links on public areas • private fibers on campus (10/100 Mbit/s Ethernet) • Switching - mostly separate for voice and data • “star shaped” TCP/IP net for data • distributed PABX for voice (use TCP for signaling) • common structured cabling on all buildings

  10. “Torre Faro”

  11. “Torre Faro” - Details

  12. Multi-point wireless terminal

  13. Wireless terminal - detail

  14. Head office terminal

  15. Head office - detail

  16. Science campus terminal

  17. University net structure Infostrada students domain GARR-B Nextra NAT ~5.000 hosts ~500 hosts Teaching hospital NAT

  18. The net backbone To GARR-G ATM 34 Mbit/s Main access router Catalist level 2 switch Backdoor to Infostrada studenti.unipd.it Main University servers Links to departmental nets

  19. Total Internet traffic

  20. Spring: initial negotiation for a cheap domestic access service Summer: tender action, six major ISP with phone service license invited incumbent, 2 major entrants, 2 ISP, 1 CLEC September: 3 declined to offer, 1 ISP offered the service at cost with rebate on traffic level 2 offered free of charge service Students Internet access service (1999)

  21. Traffic levels from “Libero”

  22. Service level agreement • Infostrada provides a mail box and web pages space for each student using matriculation data • Students pay the telephone bill for a local call • A “virtual” domain studenti.unipd.it is carved out of the libero.it domain • The students domain is connected through a “back door” to the University net (this off loads the busy Internet access ramp and NAP) • “win win” solution

  23. The Company & the NetworkThe UniPD Case A. de Petris C.T.O. 24 May 2000

  24. Our Profile (updated March 2000) Voice Customers 2.757.000 Internet Customers 2.000.000 Turnover (Billions if Lire) (Millions of Euro) 1.400* (723 €) Operative Fibre (km) MAN (km) 5,139 349 * Year 1999

  25. CO The Network Development BZ UD Transport network entry points Voice exchanges Voice POP Data/internet backbone nodes Data/internet access nodes TN BL SO VB PN GO TV LC AO VA BG VI VA TS VE VR PD BI BS • Forecast development (by Year 2000) • Transport Network: • 6,200 Km of Optical Cables • 400 km in Metropolitan Areas • Voice Network: • 32 Voice Switches • 48,000 E1 Ports • Data/Internet Network: • 89 POPs • 120,000 Diaul Up Ports NO Monza IV MI LO CR VC MN RO PV TO PR FE AL PC AT CN RA RE BO BO GE SV MO RI SP MC FO CS IM PI PO PS PI FI AN SI AR MC LI AP PG TR GR PE VT AQ CB FG LT RM v BA CE SS BR BN NA TA PT SA LE CA CZ RC ME TR PA CT SR AG

  26. ADM COMPACT CUSTOMER PREMISES ADM-1 TE SDH SYSTEMS OVER FIBER OPTIC BACKBONE TRANSPORT NETWORK (SDH) SDH RADIO ACCESS NODE TE RNU ADM ADM DXC RADIO SYSTEMS (PP and PMP/LMDS) VOICE COPPER ACCESS NODE NT TE DATA XDSL SYSTEMS OVER UNBUNDLED COPPER PAIRS ADM USER TERMINALS PRIMARY ACCESS NETWORK (SDH and DXC over FIBER OPTIC) CORE AND BACKBONE SECONDARY ACCESS NETWORK (FIBER OPTIC, RADIO AND COPPER) The Access NetworkDevelopment => 22 Cities in 2000

  27. The UniPD Case - The Network TORRE FARO • Conectitvity for UniPD Private Voice Network • Connectivity for UniPD Private Data Network • Management of UniPD Private IP Network • Connectivity to Public Network via SDH Systems over Optical Fibers • Using Radio SDH STM-1 Ring Architecture (Bosch/Marconi Technology) • Using PMP Radio System for Connecting 6 high bandwith sites (Bosch/Marconi Technology) • Managing LL for connecting low bandwith sites PIOVEGO CENTRALE IS CCA -BO’ STORIONE FIBER OPTIC PLAN RADIO PMP AREA RADIO SDH STM-1 LINKS

  28. The UniPD Case - VAS for Students • Based on Infostrada “Libero” Dial Up Service • Customized E-Mail Environment (@Studenti.unipd.it) • Customized Registration Environment for Student DEDICATED MAIL SERVERS INTERNET INFOSTRADA MILANO INFOSTRADA IP BACKBONE WEB SERVERS PSTN UNIPD INTRANET Dial-up PADOVA

  29. V V UNIPD INTRANET UNIPD INTRANET UNIPD VOICE NETWORK UNIPD VOICE NETWORK VoIP Project - Case 1: PD-VIPBX to PBX VICENZA PADOVA QoS 256kb/s C2600 VoIPgtw C2610 C7500 VoIPgtwC3640 E1/Qsig E1/Qsig PBX PBX

  30. V UNIPD INTRANET HOSPITAL INTRANET UNIPD VOICE NETWORK VoIP Project - Case 2: Remote Sites IP Phones to PBX PADOVA POLICLINICO MCS 7820 C7206 C7500 CALL MANAGER 2Mb/s C3640VoIPgtw E1 5 IP Phones PBX

  31. V UNIPD INTRANET UNIPD VOICE NETWORK VoIP Project - Case 3: Libero to UNIPD PC to Phone H.323 Terminal Radius dB-utenti INFOSTRADA IP BACKBONE C2610Gatekeeper C7500 PIX 515 C3640VoIPgtw PSTN E1 PBX Dial-up H.323 Terminal PADOVA

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