Internet2 Engineering Update

Guy AlmesInternet2 Chief Engineer<almes@internet2.edu>

Internet2 Membership MeetingWashington — 8 October 1997

Outline of the Talk

Internet2 Engineering Objectives Working Groups GigaPoP Progress Four Key Engineering Issues

Large Delay-Bandwidth Products Introducing Quality of Service Improving Multicast Support Introducing IPv6

Overview of Demo Network

Internet2 Engineering Objectives

Enable Advanced Applications Strengthen the Universities in their Research /

Education Missions Pioneer Specific Technical Advances Establish GigaPoPs as Effective Service Points

Applications and Engineering

Applications

Engineering

Motivate Enables

Comments on Apps and Plumbing

Advanced applications transform high-speed plumbing into value

Advanced plumbing enables advanced applications

Profligate use of bandwidth, per se, does not make an application ‘advanced’

Megalomaniac plumbing, per se, does not make the plumbing ‘advanced’

Comments on the UniversityResearch/Education Mission

Due to their teaching mission, universities scatter researchers

University faculty and students therefore have a disproportionate need to be able to collaborate at a distance

Sketch of Internet2 Architecture

Interconnect

gigaPoP

u

gigaPoP

gigaPoP

gigaPoP

uu

uu

u

uuInterconnect: connects all the gigaPoPs to each other

GigaPoPs: connect universities to the Interconnect and to other services

Universities: upgrade their LANs to more than 500 Mb/s

uu

gigaPoP

1997 vs 1998 Sets of Aspirations

1997 High-speed uncongested best-efforts IPv4 T3 and OC3 will be typical; some OC12 About 15 gigaPoPs; about 45 universities Introduction of Measurements

1998 Introduce Quality of Service Improve Multicast Support Introduce IPv6

Working Groups

to address project-wide technical issues minimal constraint on natural diversity

of gigaPoP technical choices complementary to groups such as the

IETF

Initial Working Groups IPv6: Dale Finkelson of Univ Nebraska Measurement: David Wasley of UCOP Multicast: Dave Meyer of Univ Oregon Network Mgmt: Mark Johnson of MCNC Quality of Service: Ben Teitelbaum (staff) Routing: Steve Corbato of Univ Washington Security: Peter Berger of Carnegie Mellon Topology: Paul Love (staff)

Operational GigaPoPs

DEN -- NCAR / Univ Colorado DTW -- Michnet ORD -- MREN in Chicago MSP -- in Minneapolis PHL -- MAGPI PIT -- PSC RIC -- NetworkVirginia

Coming this Month

ATL -- Southern Crossroads CLE -- OARnet HOU -- Rice, Texas A&M, Univ Houston etc. RDU -- NCGigaNet

Coming by end of 1997

BOS -- Boston Univ, Harvard, MIT, etc. BWI -- Univ Maryland etc DCA -- WREN GNV -- FloridaNet LEX -- SEPSCoR NYC -- NYSERnet2000 (southern) SFO -- CalREN2 (northern)

Coming early in 1998

BHM -- Alabama / Gulf Central BNA -- Tennessee LAX -- CalREN2 (southern) MKC -- Great Plains Network PDX -- Oregon SEA -- Washington SYR -- NYSERnet2000 (northern)

Four Key Engineering Issues

Large Delay-Bandwidth Products Introducing Quality of Service Improving Multicast Support Introducing IPv6

Large Delay-Bandwidth Products

As the product of delay and bandwidth grows: The number of unacknowledged packets grows It becomes more difficult to sustain a steady stream of

data from end to end Several consequences:

Need for direct physical paths Tradeoff between buffering and variation in delay

Introducing Quality of Service

Technical: End-to-end vs Intermediate Host vs Proxies Bandwidth, Delay parameters

Administrative: Admission Control Measurements Authentication

Improving Multicast Support

Current MBone community is small Many advanced applications are naturally

multicast one to many (e.g., distance education) few to few (e.g., graduate seminars or conferences)

Scaling is hard: Optimize for transmission lines? Optimize for packet forwarding?

IPv6 Issues

Initially this will appear to be an end in itself We hope/expect that it will become an aid to

solving other problems Compact Routing Tables Some help for QoS, IP options

Products will be available beginning 1997

International Aspect

The university community is intrinsically international

Advanced applications connect faculty/students within our (international) community

And we’ll all be buying the same technical products / services in the future

Overview of Demo Network

T3 connection to the vBNS Microcosm of gigaPoP Microcosm of three campuses

Special thanks to …

MCI vBNS group Cisco, FORE, IBM Sun, Hewlett Packard, Silicon Graphics Starburst

Highway1 staff

GWU and Univ Maryland staff