Campus Event Calendar
Event Entry
What and Who
Scaling Internet Routing with Legacy Protocols
Paul Francis
Cornell University
SWS Distinguished Lecture Series
Paul has been a researcher in computer networking for going on 20 years now,
in such organizations as MITRE, Bellcore, NTT Software Labs, and ACIRI.
Within computer networking, Paul's work has centered on routing and
addressing, with a particular liking for problems having to do with large
and self-configuring networks. Work in this vein extends from Landmark
Routing, done in the late 80's, through Yoid end-system (overlay) multicast
(late 90's), to recent work on unstructured P2P networks and more scalable
end-system multicast. Notoriously, Paul is the inventer of NAT
(demonstrating originality, if not prognosticative ability, judging from his
bank account). Other innovations of Paul's include shared-tree multicast,
IDMaps host proximity service, shortcut routing (through large non-broadcast
subnetworks), and the multiple-addresses approach to site multi-homing,
which is the basis for scalable routing in IPv6. Paul joined Cornell
University in 2002, where he has worked on IP anycast services, new network
management architectures, BGP scalability, overlay multicast, random node
selection in P2P networks, new transport protocols, E2E approaches to DoS and
worm prevention, and new naming and addressing architectures for the
Internet.
AG 1, AG 2, AG 3, AG 4, AG 5, SWS, RG1, RG2
Expert Audience
English
Note: We use this to send email in the morning.
Date, Time and Location
Friday, 18 January 2008
14:00
60 Minutes
G26
57/210
Kaiserslautern
Abstract
The large and constantly growing Internet routing table size is a
longstanding problem that leads to increased convergence time, increased boot
time, and costly equipment upgrades. The problem exists for both VPN and
global routing tables, and there is concern that IPv4 address space
exhaustion over the next few years may lead to an increasingly fragmented
address space, poor aggregation, and therefore a increase in the rate of
routing table size. To address these issues, the IETF is working hard on new
protocols that will shrink routing tables. In this talk, we present a way to
shrink routing tables, easily by an order of magnitude or more, without any
new protocols. The idea behind our approach, called Virtual Aggregation, is
to partition the address space into large Virtual Prefixes, each of which is
delegated to a tunneled virtual network composed of a fraction of ISP
routers. Virtual Aggregation can be used independently by a single ISP, or
cooperatively among a group of ISPs. This talk describes how Virtual
Aggregation can be configured and deployed, and gives performance results
based on measurements made at a Tier-I ISP.
Contact
Brigitta Hansen
0681 - 9325200
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Brigitta Hansen, 01/08/2008 15:24 -- Created document.