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Home » I Know What Your Packet Did Last Hop: Using Packet Histories to Troubleshoot Networks
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I Know What Your Packet Did Last Hop: Using Packet Histories to Troubleshoot Networks

Authors: 

Nikhil Handigol, Brandon Heller, Vimalkumar Jeyakumar, David Mazières, and Nick McKeown, Stanford University

Abstract: 

The complexity of networks has outpaced our tools to debug them; today, administrators use manual tools to diagnose problems. In this paper, we show how packet histories—the full stories of every packet's journey through the network—can simplify network diagnosis. To demonstrate the usefulness of packet histories and the practical feasibility of constructing them, we built NetSight, an extensible platform that captures packet histories and enables applications to concisely and flexibly retrieve packet histories of interest. Atop NetSight, we built four applications that illustrate its flexibility: an interactive network debugger, a live invariant monitor, a path-aware history logger, and a hierarchical network profiler. On a single modern multi-core server, NetSight can process packet histories for the traffic of multiple 10 Gb/s links. For larger networks, NetSight scales linearly with additional servers and scales even further with straightforward additions to hardware- and hypervisor-based switches.

Nikhil Handigol, Stanford University

Brandon Heller, Stanford University

Vimalkumar Jeyakumar, Stanford University

David Mazières, Stanford University

Nick McKeown, Stanford University

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BibTeX
@inproceedings {179783,
author = {Nikhil Handigol and Brandon Heller and Vimalkumar Jeyakumar and David Mazi{\`e}res and Nick McKeown},
title = {I Know What Your Packet Did Last Hop: Using Packet Histories to Troubleshoot Networks},
booktitle = {11th USENIX Symposium on Networked Systems Design and Implementation (NSDI 14)},
year = {2014},
isbn = {978-1-931971-09-6},
address = {Seattle, WA},
pages = {71--85},
url = {https://www.usenix.org/conference/nsdi14/technical-sessions/presentation/handigol},
publisher = {USENIX Association},
month = apr,
}
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