evolution of network services in a large university an italian case study: padova
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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 - PowerPoint PPT PresentationTRANSCRIPT
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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
24
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