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Category Archives: network monitoring

Analyzing the Internet uplink of upc

Sunday, September 30, 2007

In our research lab at UPC we’re working on network monitoring technologies (see http://loadshedding.ccaba.upc.edu). When publishing research papers in our area, it is important to test the results of the proposed techniques on links that are representative enough of the overall traffic of the Internet (or at least, to try to test the techniques under […]

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libpcap: packet timestamps not increasing

Wednesday, July 18, 2007

As some of you may already know, one of my jobs is to maintain and develop for the CoMo network monitoring system. CoMo supports many input sniffers, such as bpf for FreeBSD systems, netflow, sflow, data from the network monitoring specialized DAG cards, and most notably libpcap.
In CoMo, every packet has a reception timestamp. How […]

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