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Architecting for Innovation

Architecting for Innovation. ACM SIGCOMM Computer Communication Review 2011 July Presenter ：許耀中 101062539. Outline. Introduction Motivating the Framework Pathlets NetAPI Dealing with DoS Evaluation Conclusion. Introduction. The biggest problem with the current Internet architecture

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Architecting for Innovation

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  1. Architecting for Innovation ACM SIGCOMM Computer Communication Review 2011 July Presenter ：許耀中 101062539

  2. Outline • Introduction • Motivating the Framework • Pathlets • NetAPI • Dealing with DoS • Evaluation • Conclusion

  3. Introduction • The biggest problem with the current Internet architecture • Inability to accommodate innovation • The original Internet architecture falls short • Mobility • Data-oriented functionality • Clean slate redesigns • Current needs • Future requirements

  4. Introduction • Goal • To design an Internet that supports architectural evolution and diversity

  5. Motivating the Framework • Many desirable design changes: • Require widespread agreement • Radiate throughout the architecture • Physical infrastructure • Lack of architectural modularity • Core fixed design • Not be a comprehensive architecture, but only a minimal architectural framework. • Augmented with additional architectural components • Microkernel & User-space modules

  6. Motivating the Framework • Architectural modularity requires interfaces be both • Extensible • New functionality • Obsolete • Abstract • Avoiding implementation details

  7. Motivating the Framework • Framework for Internet Innovation (FII) only defines three core primitives: • Interdomain routing • Require global agreement among the domains • Network API • Every application need to be modified • Against denial-of-service attacks • Availability, identity,authenticity • Standard cryptographic techniques

  8. Motivating the Framework • Additional Primitives • Meta-negotiation • Bootstrap interface • The domain identifier • Intradomainaddress (IDA) • Interface query • Assumptions: • Domain structure

  9. Motivating the Framework

  10. Pathlets • Each domain advertises a set of path segments (pathlets) over which they are willing to carry traffic. • Pathlets are specified in terms of the “virtual nodes” they traverse. • Route computation agent (RCA) • Provides the host an appropriate end-to-end path to a given destination

  11. Pathlets • Abstraction • Independent of domain internals • Extensibility • These pathlet descriptions can be augmented with extensible metadata • QoS , Bandwidth • The granularity of pathletsis not specified • AS , a physical router • physical link, Path across several AS

  12. NetAPI • NetAPI • Sockets, PubSub, RPC • NetAPI refer to entities in the world with names. • Name resolution of a host would typically return a full address

  13. Dealing with DoS • Shut up message (SUM) • Interface uses two fields in a packet header • Who to contact (trusted third party, TTP) to shut up the source of that packet • An accountability field that allows the TTP to identify the source of the packet

  14. Example

  15. Evaluation

  16. Evaluation

  17. Evaluation

  18. Conclusion • We described a microkernel-like approach to Internet architecture, where fixing a minimal design allows the rest of the architecture to evolve much more easily.

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