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Importance of Resilience in the Future Internet

This presentation discusses the importance of resilience in the future internet and explores the framework, mechanisms, and experiments related to network resilience. It covers topics such as network elements, tussles in the internet, measurement approaches, and resilience metrics. The goal is to highlight the need for a resilient future internet and the challenges involved.

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Importance of Resilience in the Future Internet

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  1. The importance of Resilience in the Future Internet: Framework, Mechanisms and Experiments FIA Poznan, Future Internet Architecture Session 25th October 2011 Paul Smith (p.smith@comp.lancs.ac.uk) on behalf of the ResumeNet project (http://www.resumenet.eu)

  2. What is network resilience? J. P.G. Sterbenz, D. Hutchison, E. K. Cetinkaya, A. Jabbar, J. P. Rohrer, M. Schöller, and P. Smith, “Resilience and survivability in communication networks: Strategies, principles, and survey of disciplines,” Computer Networks: Special Issue on Resilient and Survivable Networks (COMNET), vol. 54, no. 8, pp. 1243–1342, June 2010. “The ability of the network to provide and maintain an acceptable level of service in the face of various faults and challenges.”

  3. Talk Overview From a network resilience perspective What are the main Future Internet elements? What are the main tussles in the Internet? Approaches to measuring the validity of Future Internet architectures?

  4. What are the main Future Internet elements?[from a resilience perspective]

  5. Resilience Control Loop For resilience, a Future Internet should include the following elements, which form a resilience control loop

  6. Multilevel Network Resilience A Future Internet must be multilevel in its operation • Information sharing between layers • Coordinated multilevel control This must transcend the technical layers to involve operational, economic and political aspects Systematic use of context information is required to gain insights into the nature of challenges However, multilevel aspects add complexity

  7. What are the tussles in the Internet? [from a resilience perspective]

  8. Future Internet Resilience Tussles Inter-domain information sharing and cooperation is critical for resilience • Greater decision making capabilities emerge with improved situational awareness Privacy and liability tussles abound Typically, resilience has a cost, e.g.: • Monetary costs of redundant components • Energy costs are becoming a primary concern Monetary costs are pretty well understood but understanding the energy footprint of resilience (and the trade-offs) is an important area for future research

  9. Approaches to measuring the validity of Future Internet architectures? [from a resilience perspective]

  10. Which metrics should I choose? ? R = [0, 1] Resilience is a fundamental property of the future Internet • However, it is not clear how to measure resilience

  11. Approach - Measuring Resilience Metric Number of links removed E.g., connectivity, path length, delay, jitter, etc.

  12. Approach - Measuring Resilience Metric Number of links removed

  13. Approach - Measuring Resilience Metric Number of links removed

  14. Approach - Measuring Resilience Metric Number of links removed

  15. Approach - Measuring Resilience Metric Best case Avg. case threshold T Worst case Number of links removed

  16. Metric Envelopes • Comparing resilience based on metric envelopes give a visual explanation of the network degradation process • Depending on the application domain a more bounded envelope might be preferable • The effect of various failure sources on the evaluated metric can be revealed

  17. Resilience Metrics: A Computational Approach

  18. GÉANT2 – A Case Study • Challenges can be: • Arbitrarily positioned • Arbitrarily shaped • Non-linear impact

  19. GÉANT2 – Where are the weak points? • Impact map visualizes the effect of a particular failure on the network as a whole

  20. GÉANT2 – Multi-level Metric Envelopes

  21. Conclusions The main architectural elements of the Future Internet • Dynamic control based on a set of fundamental elements that enable situational awareness and control • Enabling multilevel information sharing and control is a key element of a future Internet Resilience tussles • Information sharing is important for resilience, but there are privacy concerns • Energy concerns are becoming paramount – trade-offs may need to be made with respect to resilience Understanding resilience metrics are essential to a future Internet • Much research is required to determine important metrics

  22. Thank you for listening The ResumeNet Website: http://www.resumenet.eu Paul Smith (p.smith@comp.lancs.ac.uk)

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