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SUMMARY:Scaling Internet Routing with Legacy Protocols - Paul Francis (Cor
 nell University)
DTSTART:20080111T163000Z
DTEND:20080111T173000Z
UID:TALK9533@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:The large and constantly growing Internet routing table size i
 s a longstanding problem that leads to increased convergence time\, increa
 sed boot time\, and costly equipment upgrades.  The problem exists for bot
 h VPN and global routing tables\, and there is concern that IPv4 address s
 pace exhaustion over the next few years may lead to an increasingly fragme
 nted address space\, poor aggregation\, and therefore a increase in the ra
 te of routing table size.  To address these issues\, the IETF is working h
 ard on new protocols that will shrink routing tables.  In this talk\, we p
 resent 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 compo
 sed of a fraction of ISP routers.  Virtual Aggregation can be used indepen
 dently by a single ISP\, or cooperatively among a group of ISPs.  This tal
 k describes how Virtual Aggregation can be configured and deployed\, and g
 ives performance results based on measurements made at a Tier-I ISP.\n\nBi
 o:\nPaul has been a researcher in computer networking for going on 20 year
 s now\, in such  organizations as MITRE\, Bellcore\, NTT Software Labs\, a
 nd ACIRI.\nWithin computer  networking\, Paul's work has centered on routi
 ng and addressing\, with a particular liking  for problems having to do wi
 th large and self-configuring networks.  Work in this vein  extends from L
 andmark 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 inventor o
 f NAT (demonstrating  originality\, if not prognosticative ability\, judgi
 ng from his bank account).  Other  innovations of Paul's include shared-tr
 ee 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.  Pau
 l  joined Cornell University in 2002\, where he has worked on IP anycast s
 ervices\, new  network management architectures\, BGP scalability\, overla
 y multicast\, random node selection in P2P networks\, new transport protoc
 ols\, E2E approaches to DoS and worm  prevention\, and new naming and addr
 essing architectures for the Internet.\n\n
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Builiding
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