Towards Highly Reliable Enterprise Network Services via Inference of Multi-level Dependencies

Paramvir Victor Bahl, Ranveer Chandra, Albert Greenberg, Srikanth Kandula, David Maltz, Ming Zhang
ACM SIGCOMM, Kyoto, Japan, August 2007

Localizing the sources of performance problems in large enterprise networks is extremely challenging. Dependencies are numerous, complex and inherently multi-level, spanning hardware and software components across the network and the computing infrastructure. To exploit these dependencies for fast, accurate problem localization, we introduce an Inference Graph model, which is well-adapted to user-perceptible problems rooted in conditions giving rise to both partial service degradation and hard faults. Further, we introduce the Sherlock system to discover Inference Graphs in the operational enterprise, infer critical attributes, and then leverage the result to automatically detect and localize problems. To illuminate strengths and limitations of the approach, we provide results from a prototype deployment in a large enterprise network, as well as from testbed emulations and simulations. In particular, we find that taking into account multi-level structure leads to a 30% improvement in fault localization, as compared to two-level approaches.

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Bibtex Entry:

   author =       "Paramvir Victor Bahl and Ranveer Chandra and Albert Greenberg and Srikanth Kandula and David Maltz and Ming Zhang",
   title =        "{Towards Highly Reliable Enterprise Network Services via Inference of Multi-level Dependencies}",
   booktitle =    {ACM SIGCOMM},
   year =         {2007},
   month =        {August},
   address =      {Kyoto, Japan}