Future Cities Conference´13 / Peter Steenkiste - "The eXpressive Internet Architecture: A Quick Overview"
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Future Cities Conference´13 / Peter Steenkiste - "The eXpressive Internet Architecture: A Quick Overview"

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  • 1. The eXpressive Internet Architecture: A Quick Overview Peter SteenkisteDave Andersen, David Eckhardt, Sara Kiesler, Jon Peha, Adrian Perrig, Srini Seshan, Marvin Sirbu, Hui Zhang Carnegie Mellon University Aditya Akella, University of Wisconsin John Byers, Boston University Future Cities Workshop, January 23, 2013 1
  • 2. “Narrow Waist” of the Internet Key to its Success • Has allowed Internet to evolve dramatically – Technology, applications, mobility, … • But now an obstacle to addressing challenges: – No built-in securityApplications – New usage models a challenge – Limited interactions edge-core Internet Protocol • A common view is that IP is a fixed point Link Live with it!Technologies Work around the problems
  • 3. Designing the Expressive Internet Architecture • Keep the good “stuff” of the current Internet – Packets, addresses, narrow waist, … – Modularity, separate control and data planes, …Applications • Explore three concepts that directly address keyExpressive Internet challenges: Protocol – Diverse types of end-points – Intrinsic security Link – Flexible addressingTechnologies
  • 4. Today’s Internet Src: Client IP Dest: Server IP TCP Client IP Server IP• Client retrieves document from a specific web server – But client mostly cares about correctness of content, timeliness – Specific server, file name, etc. are not of interest• Transfer is between wrong principals – What if the server fails? – Optimizing transfer using local caches is hard • Need to use application-specific overlay or transparent proxy – bad! 4
  • 5. eXpressive Internet Architecture Src: Client ID Dest: Content ID Cell Content• Client expresses communication intent for content explicitly – Network can retrieve content from “anywhere”• How does client know the content is correct? – Intrinsic security! Verify content using self-certifying id: hash(content) = content id• How does source know it is talking to the right client? – Intrinsic security! Self-certifying host identifiers 5
  • 6. Evolving the eXpressive Internet Architecture Src: Client ID I - Content ID Dest: F - Host ID Cell Content• What happens when a router does not recognize Content ID? • Legacy router or unpopular content • Packet gets dropped! Oops.• Use flexible addressing to evolve network without changing the architecture • Destination address includes both an Intent and Fallback ID 6
  • 7. XIA Concepts Work Together Directly support diverse network usage models Multiple CommunicatingEvolution of principle types Principal Types Principal-specific Customization security properties Flexible Intrinsic Addressing Security DAG security Deal with routing “failures” Built in security forms basis for system level security
  • 8. But Principles Don’t Support Applications and Users! Routing Applications XHCP BIND ChunkingXsockets XDP XSP XChunkP Cache ARP XIP XCMP Datalink 8
  • 9. Open Source XIA Release• XIA Prototype released in May 2012 – Includes full XIA protocol stack and utilities – Support for GENI and VM-based experiments – Improve over time with research results – More info: http://www.cs.cmu.edu/~xia• Being used to support applications, services – Working towards permanent XIA deployment• Prototype good platform for collaboration – We can provide support to users and developers 9
  • 10. How Does XIA Help Us Build a Better Network?Network-Network User-Network Users Trustworthy Network Operation Applications Services Intrinsic Security Host Content Services … Support Support Support eXpressive Internet Protocol 10
  • 11. The XIA Core Networking Team• Meet the initial core XIA team … Fahad Dongsu Hyeontaek Ashok Michel Boyan Wenfei Dogar Han Lim Anand Machadoy Li Wu• ... and some researchers who joined later Robert Pratch Matthew David Junchen Suk-Bok Grandl Piyawongwisal Mukerjee Naylor Jiang Lee (postdoc)• Faculty listed on title slides 11