Transcript 97-10-DC
Internet2 Engineering Update
Guy Almes
Internet2 Chief Engineer
<[email protected]>
Internet2 Membership Meeting
Washington — 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
Motivate
Enables
Engineering
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 University
Research/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
u
Interconnect: connects all the gigaPoPs to each other
u
GigaPoPs: connect universities to the Interconnect and to other services
gigaPoP
Universities: upgrade their LANs to more than 500 Mb/s
u
Interconnect
u
u
gigaPoP
u
gigaPoP
u
u
gigaPoP
gigaPoP
u
u
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