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Internet Atlas Gallery

Mbone Tunnels of the Major Backbone Networks

Tamara MunznerStanford University
Eric Hoffman Ipsilon Networks
kc claffy CAIDA at SDSC
Bill Fenner Xerox PARC

Visualization Thumbnail About the Visualization
Visualization Techniques:
(Technique1): Convert machine-readable mrinfo data into NDP format.
(Technique2): Add latitude and longitude to hostnames in the NDP file using hostresolve.perl (based on hostnames) and trim_bidirect (based on IP address) tools.
(Technique3): Computer the shortest geodesic arc between lat/longs of the endpoints of each tunnel. The height of the arc depends on its length. Maintain a minimum arc height so that even short tunnels remain visible. (Technique3): Distinguish three groups of hosts where 1) both endpoints of tunnel belong to ISP, 2) one endpoint is within an ISP, and 3) neither endpoint lies within an ISP.
(Technique3): Specify finely subdivided arcs (arcstep=20) on a high-resolution globe (~2MB).
(Technique4): Support VRML interaction by generating an OOGL file using edge2gv, then using oogl2vrml converter.
Key Visualization Mappings:
(Mapping1): Color distinguishes ISPs. (MCI=red, Sprintlink=cyan, NASA=blue, ESnet=green, Dartnet=magenta, BBNPlanet=yellow, ANS=white, all other ISPs= black.
(Mapping2): Major providers are shown by thick lines, all other providers are drawn as thin black lines.
(Mapping3): Position of hosts is based on latitude and longitude information in the NDP file.
Visualization Tools:
(Tool1): tunnel2edge.perl (converts mrinfo to NDP format)
(Tool2): hostresolve.perl, trim_bidirect (add lat/long)
(Tool3): edge2gv (calculate arcs and gen .oogl file, then convert to .wrl)
(Tool4): grouper (assigns geom tags such as color based on edge file tags) and linegrouper (same but works across multiple records.)
(Tool5): WebOOGL/Geomview system (highlight coloring, linewidth selection, manual tweaking, and animations of mbone tunnel growth)
Full-Size Visualization Back
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