Transcript Evolution of Network Services in a Large University an Italian case

Evolution of Network Services in a Large University
an Italian case study: Padova
Franco Bombi
University of Padova
Alberto de Petris
Infostrada
Terena - 24.5.2000
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Padova University
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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
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Bo - The Ox”
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
Infostrada
students
domain
GARR-B
Nextra
NAT
~5.000 hosts
~500 hosts
Teaching hospital
NAT
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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
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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)
Voice Customers
Internet Customers
Turnover
(Billions if Lire)
(Millions of Euro)
Operative Fibre (km)
MAN (km)
* Year 1999
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2.757.000
2.000.000
1.400* (723 €)
5,139
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The Network Development
BZ
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COLC
TV
VA
BG
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B NO
Monza BS VR
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MI LOCR
VC
MN
RO
PV
PR
CNAT
AL
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BOBO
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GE
SP
IM
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TS
Voice exchanges
FE
PC
SV
Transport
network entry
points
BL
M
MC O
PI
PO
PI
LI
Voice POP
RI
Data/internet
backbone nodes
FO CS
PS
FI
PG
Data/internet
access nodes
MC AN
AP
SI
AR
TR
G
R
PE
VT
AQ
CB
RM
FG
LT
CE
SS
NA
v
BA
BR
BN
TA
PT
SA
LE
CA
CZ
RC
ME
TR
PA
CT
AG
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SR
 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
The Access Network
Development
ADM
=> 22 Cities in 2000
SDH SYSTEMS
OVER FIBER OPTIC
BACKBONE
TRANSPORT
NETWORK
(SDH)
DATA
CORE AND
BACKBONE
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ADM
ADM
DXC
ADM
VOICE
SDH
PRIMARY
ACCESS
NETWORK
(SDH and DXC
over FIBER OPTIC)
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RADIO
ACCESS
NODE
COPPER
ACCESS
NODE
RADIO SYSTEMS
(PP and PMP/LMDS)
COMPACT
CUSTOMER
PREMISES
ADM-1
TE
RNU
TE
NT
TE
XDSL SYSTEMS
OVER UNBUNDLED
COPPER PAIRS
SECONDARY ACCESS NETWORK
(FIBER OPTIC, RADIO AND COPPER)
USER
TERMINALS
The UniPD Case - The Network
•
TORRE
FARO
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•
•
PIOVEGO
CENTRALE IS
•
CCA -BO’
STORIONE
•
RADIO SDH STM-1 LINKS
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RADIO PMP AREA
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FIBER OPTIC PLAN
•
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 STM1 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
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
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DEDICATED
MAIL SERVERS
INTERNET
INFOSTRADA
MILANO
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INFOSTRADA
IP BACKBONE
PSTN
WEB SERVERS
UNIPD
INTRANET
Dial-up
PADOVA
VoIP Project - Case 1: PD-VI
PBX to PBX
VICENZA
PADOVA
UNIPD
INTRANET
UNIPD
INTRANET
VoIP gtw
C2610
V
UNIPD
VOICE
NETWORK
C2600
QoS
256kb/s
VoIP gtw
C3640
V
E1/Qsig
E1/Qsig
PBX
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C7500
PBX
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UNIPD
VOICE
NETWORK
VoIP Project - Case 2: Remote
Sites IP Phones to PBX
PADOVA
UNIPD
INTRANET
POLICLINICO
MCS 7820
HOSPITAL
INTRANET
C7206
C7500
CALL
MANAGER
2Mb/s
C3640 VoIP gtw
V
E1
PBX
5 IP Phones
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UNIPD
VOICE
NETWORK
VoIP Project - Case 3: Libero to
UNIPD PC to Phone
H.323 Terminal
Radius
UNIPD
INTRANET
dB-utenti
INFOSTRADA
IP BACKBONE
C2610
Gatekeeper
C7500
PIX 515
C3640 VoIP gtw
V
E1
PSTN
PBX
Dial-up
H.323 Terminal
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PADOVA
Terena - 24.5.2000
UNIPD
VOICE
NETWORK