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LISA 2001 Abstract
Macroscopic Internet Topology and Performance Measurements From the DNS Root Name Servers
Marina Fomenkov, kc claffy, Bradley Huffaker, and David
Moore, CAIDA/SDSC/UCSD
Abstract
We describe active measurements of topology and end-to-end latency
characteristics between several of the DNS root servers and a subset
of their clients using the skitter tool developed by CAIDA. We
gather a sample of clients for each monitored DNS root server, combine
these samples into a common target list and then actively probe these
targets and analyze their connectivity. We identify the subsets of
destinations that have large latency connections to all instrumented
root name servers and discuss their geographical make-up. Our goal is
to build an analytical framework for evaluating the optimality of root
server placement and its impact on the efficiency of the DNS service.
The skitter tool and the methodology we propose can also be
used for monitoring the end-to-end performance in large networks and
for assessing the optimality of web servers placement in general.
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