PennNet Engineering - Kassabian - March 1998 1
An Introduction to Internet 2
Deke KassabianUniversity of Pennsylvania ISC Network Engineering
PennNet Engineering - Kassabian - March 1998 2
What We’ll Cover
Part 1 - The Evolution of Internets Part 2 - Internet 2 Applications Part 3 - Internet 2 Engineering
PennNet Engineering - Kassabian - March 1998 3
The Evolution of Internets
Section 1Section 1
PennNet Engineering - Kassabian - March 1998 4
The Internet in the USA
Tens of millions of computers Multiple national backbones,
interconnected at NAPs Many scaling and performance problems
PennNet Engineering - Kassabian - March 1998 5
The vBNS
National ATM network at OC-3 (155 Mbps) and OC-12 (622Mbps) bandwidths
Originally interconnected only 5 national Super Computer Centers (SCCs)
NSF “High Performance Connections Program” allows institutions with meritorious research projects to have connections to the vBNS
PennNet Engineering - Kassabian - March 1998 6
Network Evolution
Experimental
Commodity Mature, rapid growth
Early Growth
PennNet Engineering - Kassabian - March 1998 7
1970: The ArpanetExperimentalCommodityMature, rapid growthEarly Growth
The ARPANET
PennNet Engineering - Kassabian - March 1998 8
1980s: Transition to NSFNetExperimentalCommodityMature, rapid growthEarly Growth
Birth of the regionals(NEARnet, NYSERnet,PREPnet, SURAnet, others)
PennNet Engineering - Kassabian - March 1998 9
Early 1990s: Transition to commercial backbone
ExperimentalCommodityMature, rapid growthEarly Growth
Regionals plus the NSFNET Backbone. Major carriers building.
PennNet Engineering - Kassabian - March 1998 10
ExperimentalCommodityMature, rapid growthEarly Growth
1995: The Commodity Internet
Commercial carrierswith exchange points (NAPs).No governmentbackbone
PennNet Engineering - Kassabian - March 1998 11
ExperimentalCommodityMature, rapid growthEarly Growth
1996: The vBNS
The vBNS
PennNet Engineering - Kassabian - March 1998 12
ExperimentalCommodityMature, rapid growthEarly Growth
Right Now: Internet 2
Internet 2
PennNet Engineering - Kassabian - March 1998 13
Why an Internet 2
Develop a next-generation Internet for research and education that is designed to support multimedia services and very large (global) scope.
PennNet Engineering - Kassabian - March 1998 14
Internet 2 Organization
National effort started in 1996 and organized by EDUCOM
Participation by 100 or so top universities and national research labs
Two large and well organized efforts: Applications and Engineering
Funded mostly by participants, partly by the US government
PennNet Engineering - Kassabian - March 1998 15
Coordinated Activities
Applications
Engineering
Mot
ivat
e Enable
PennNet Engineering - Kassabian - March 1998 16
Internet 2 Applications
Section 2Section 2
PennNet Engineering - Kassabian - March 1998 17
Today’s Applications
Telnet (Remote Terminal)
Electronic Mail
USENET News
Web Browsing
File Transfer
Remote File Systems
GUIs (including X)
PennNet Engineering - Kassabian - March 1998 18
Today’s Applications
Telnet (Remote Terminal)
Electronic Mail
USENET News
Web Browsing
File Transfer
Remote File Systems
GUIs (including X)
Bandwidth Required:Low to Moderate
Delay Tolerance:Moderate to High
Jitter Tolerance:Moderate to High
Today’s “Best Effort” Network is adequate
PennNet Engineering - Kassabian - March 1998 19
Tomorrow’s Applications
Non realtime A/V playback
Internet Telephony
N-way video conferencing
Telemedicine
“The Cave”
PennNet Engineering - Kassabian - March 1998 20
The CAVEA surround-screen, surround-sound,
projection-based virtual reality system
Networking multiple CAVEs together is very demanding of network resources
PennNet Engineering - Kassabian - March 1998 21
Tomorrow’s Applications
Non realtime A/V playback
Internet Telephony
N-way video conferencing
Telemedicine
“The Cave”
Bandwidth Required:High to Very High
Delay Tolerance:Low to Moderate
Jitter Tolerance:Low to Moderate
Today’s “Best Effort” Network is NOT adequate
PennNet Engineering - Kassabian - March 1998 22
Requirements for Tomorrow’s Applications
Minimizing Delay Minimizing Jitter Handling of large objects Managing resource
schedules Managing demand
PennNet Engineering - Kassabian - March 1998 23
We need a QoS network!
A QoS network is a network inwhich such requirements can be met by requesting certain quality
features of the network.
PennNet Engineering - Kassabian - March 1998 24
Internet 2 Engineering
Section 3Section 3
PennNet Engineering - Kassabian - March 1998 25
Internet 2 Technology: Advanced Devices
Devices that can partition bandwidth Devices that can classify and/or expedite traffic
PennNet Engineering - Kassabian - March 1998 26
Reserved Bandwidth
All “Best Effort”
Audio Traffic300 Mbps
Video Traffic500 Mbps
1 Gbps
PennNet Engineering - Kassabian - March 1998 27
Expedited TrafficNot possible with many network
devices today.
AudioVideo
File Xfer
“Best effort” traffic arrives ahead of time sensitive traffic.
NetworkForwarding
Device
PennNet Engineering - Kassabian - March 1998 28
AudioVideo
File Xfer
“Best effort” traffic is forwarded ahead of time sensitive traffic.
NetworkForwarding
Device
Expedited TrafficNot possible with many network
devices today.
PennNet Engineering - Kassabian - March 1998 29
TrafficClasifierTrafficClasifier
Expedited Traffic “Traffic Classifiers” enable successful
handling of time sensitive traffic.
AudioVideo
File Xfer
“Best effort” traffic arrives ahead of time sensitive traffic.
Traffic Classifier
Mult.queues
PennNet Engineering - Kassabian - March 1998 30
AudioVideo
File Xfer
TrafficClasifierTrafficClasifier
“Best effort” traffic is delayed infavor of time sensitive traffic.
Traffic Classifier
Mult.queues
Expedited Traffic “Traffic Classifiers” enable successful
handling of time sensitive traffic.
PennNet Engineering - Kassabian - March 1998 31
RSVP and IPv6 might never be deployed in the “Commodity Internet” without first testing in a
network like Internet 2
Internet 2 Technology: Protocols
RSVP is the IP Resource Reservation Protocol IPv6 is the “Next Generation” of IP and allows
for very large address space, greatly enhanced routing summary, and QoS specification of IP network flows
PennNet Engineering - Kassabian - March 1998 32
Internet 2 Technology: Gigapops
Aggregation points for vBNS/Internet 2 sites. Very high availability operations with
redundant/diverse fiber paths, 24 hour manned operation.
Very high bandwidth devices - gigabit routers and switches.
Connections to Internet 2 backbone, vBNS, other Internet 2 members. Other connections to subscriber sites and to Commodity Internet services.
PennNet Engineering - Kassabian - March 1998 33
I2 Concept DiagramUSCUC SystemSan Diego SCCPSCPenn StateMITYalePrincetonPennDelawareRutgersHarvardCornellCommodityInternetGigapopGigapopGigapopGigapopGigapopGigapopInternet 2vBNS
PennNet Engineering - Kassabian - March 1998 34
For more information....
The Internet 2 web site is at» <URL:http://www.internet2.edu>
Penn’s Internet 2 web pages are at» <URL:http://www.upenn.edu/computing/i2/>