Matt Roughan

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In this paper we analyze more than 100 hours of packet traces from Planet-Lab measurements to study the correlation of Internet packet losses. We first apply statistical tests to identify the correlation timescale of the binary loss data. We find that in half of the traces packet losses are far from independent. More significantly, the correlation timescale(More)
BGP data contains artifacts introduced by the measurement infrastructure which can substantially affect analysis. This is especially important in operational systems where ldquocrying wolfrdquo will result in an operator ignoring alarms. In this paper, we investigate the causes of measurement artifacts in BGP data - cross-checking and using properties of(More)
What does a childpsilas search of a large, complex cartoon for the eponymous character (Waldo) have to do with Internet routing? Network operators also search complex datasets, but Waldo is the least of their worries. Routing oscillation is a much greater concern. Networks can be designed to avoid routing oscillation, but the approaches so far proposed(More)
Newly announced IP addresses (from previously unused IP blocks) are often unreachable. It is common for network operators to filter out address space which is known to be unallocated ("bogon" addresses). However, as allocated address space changes over time, these bogons might become legitimately announced prefixes. Unfortunately, some ISPs still do not(More)
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