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Network visualization with Nam, the VINT network animator

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6 Author(s)
D. Estrin ; Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA ; M. Handley ; J. Heidemann ; S. McCanne
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Network protocol designers face many difficult tasks, including simultaneously monitoring state in a potentially large number of nodes, understanding and analyzing complex message exchanges, and characterizing dynamic interactions with competing traffic. Traditionally they have used packet traces to accomplish these tasks, but traces have two major drawbacks: they present an incredible amount of detail, which challenges the designer's ability to comprehend the data; and they are static, which hides an important dimension of protocol behavior. As a result, detailed analysis frequently becomes tedious and error-prone. Although network simulators such as the VINT project's ns can easily generate numerous detailed traces, they provide limited help for analyzing and understanding the data. Nam, the network animator that we developed in our work at the VINT project, provides packet-level animation, protocol graphs, traditional time-event plots of protocol actions, and scenario editing capabilities. Nam benefits from a close relationship with ns, which can collect detailed protocol information from a simulation. With some preprocessing. Nam can visualize data taken directly from real network traces

Published in:

Computer  (Volume:33 ,  Issue: 11 )