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

Franco Bombi

University of Padova

Alberto de Petris

Infostrada

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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

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

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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

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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

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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

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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

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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

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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

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“Torre Faro”

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“Torre Faro” - Details

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Multi-point wireless terminal

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Wireless terminal - detail

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Head office terminal

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Head office - detail

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Science campus terminal

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University net structure

GARR-B Infostradastudentsdomain

Nextra

~5.000 hosts ~500 hosts

Teaching hospital

NAT

NAT

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The net backbone

Catalist level 2 switch

Main access router

To GARR-GATM 34 Mbit/s

Links to departmental nets

Main Universityservers

Backdoor toInfostradastudenti.unipd.it

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Total Internet traffic

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Students Internet access service (1999)

• 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

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Traffic levels from “Libero”

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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

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The Company & the Network

The UniPD Case

A. de Petris

C.T.O.

24 May 2000

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Our Profile (updated March 2000)Our Profile (updated March 2000)

TurnoverTurnover(Billions if Lire)(Billions if Lire)(Millions of Euro)(Millions of Euro)

Internet CustomersInternet Customers

Operative Fibre Operative Fibre (km)(km)

MANMAN (km) (km)

Voice CustomersVoice Customers

2.000.0002.000.000

1.400* (723 €)1.400* (723 €)

5,1395,139349349

2.757.0002.757.000

* Year 1999

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VA

BO

BA

NA

CZ

PA

CA

MI

VR

TN

NO

VI

PD

TV

TS

RO

TO AL PC

PR

MO

CO

UD

LIAN

PO

SA

CE

AR

BN

AT

BS

CS

MonzaIV

BI

PI

TR

v

AQ

AG

GR

PT

SS

LE

BG

BZ

FE

GE

PV

RE

LT

GO

SP MC

FI

FO

PS

RMFG

METR

VA

MN

SI

AO

CN

IM

TA

SV

VC

AP

LO

BR

CB

CR

CT

SR

SO

PE

RC

PGMC

VE

LCVB

BL

PN

RA BO

RI

VT

PI

Forecast development (by Year Forecast development (by Year 2000)2000)• Transport Network:Transport Network:

• 6,200 Km of Optical Cables6,200 Km of Optical Cables• 400 km in Metropolitan Areas 400 km in Metropolitan Areas

• Voice Network:Voice Network:• 32 Voice Switches32 Voice Switches• 48,000 E1 Ports48,000 E1 Ports

• Data/Internet Network:Data/Internet Network:• 89 POPs 89 POPs • 120,000 Diaul Up Ports120,000 Diaul Up Ports

Transport network entry points

Voice exchanges

Voice POP

Data/internet backbone nodes

Data/internet access nodes

The Network Development The Network Development

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The Access NetworkDevelopment

DXC

BACKBONETRANSPORTNETWORK

(SDH)

VOICE

DATA

CORE AND BACKBONE SECONDARY ACCESS NETWORK

(FIBER OPTIC, RADIO AND COPPER)

COMPACTCUSTOMERPREMISES

ADM-1

NT

RNU

TE

TE

TEXDSL SYSTEMS

OVER UNBUNDLED COPPER PAIRS

SDH SYSTEMSOVER FIBER OPTIC

RADIO SYSTEMS(PP and PMP/LMDS)

PRIMARYACCESS

NETWORK(SDH and DXC

over FIBER OPTIC)

USERTERMINALS

RADIOACCESS

NODE

COPPERACCESS

NODE

SDH

AD

M

AD

MA

DM

AD

M

=> 22 Cities in 2000=> 22 Cities in 2000BACKBONE

BACKBONE

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The UniPD Case - The Network• 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

RADIO SDH STM-1 LINKS RADIO PMP AREA

CENTRALE IS

PIOVEGO

FIBER OPTIC PLAN

CCA -BO’ STORIONE

TORREFARO

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The UniPD Case - VAS for Students

INFOSTRADAIP BACKBONE

PADOVADial-up

• Based on Infostrada “Libero” Dial Up Service

• Customized E-Mail Environment (@Studenti.unipd.it)

• Customized Registration Environment for Student

UNIPD

INTRANET

INFOSTRADAMILANO

PSTN

DEDICATED MAIL SERVERS

INTERNET

WEB SERVERS

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PADOVA

C7500

VV

VoIP gtw C3640

PBX

256kb/s

QoS

E1/QsigE1/Qsig

VoIP gtwC2610

VICENZA

C2600

UNIPDVOICE

NETWORKPBX

UNIPDINTRANET

VV

VoIP Project - Case 1: PD-VIPBX to PBX

UNIPDINTRANET

UNIPDVOICE

NETWORK

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5 IP Phones

2Mb/s

C7206

POLICLINICO

CALL MANAGER

UNIPDINTRANET

PADOVA

C7500

VV

C3640 VoIP gtw

PBX

E1

HOSPITALINTRANET

MCS 7820

VoIP Project - Case 2: Remote Sites IP Phones to PBX

UNIPDVOICE

NETWORK

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INFOSTRADAIP BACKBONE

H.323 Terminal

PADOVA

C7500

PBX

C2610 Gatekeeper

H.323 Terminal

Dial-up

PSTN

Radius

dB-utenti

PIX 515

E1VV

C3640 VoIP gtw

VoIP Project - Case 3: Libero to UNIPD PC to Phone

UNIPDINTRANET

UNIPDVOICE

NETWORK