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The Interdomain Setting of PlanetLab Nodes

Explore the network mapping and traffic distribution within the GREN network involving PlanetLab hosts, ASNs, and routing tables, highlighting the concentration of traffic in specific regions. Understand the implications for research studies and network diversity.

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The Interdomain Setting of PlanetLab Nodes

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  1. The Interdomain Setting of PlanetLab Nodes Suman Banerjee U of Wisconsin, Madison Timothy G. Griffin Intel Research, Cambridge UK Marcelo Pias Intel Research, Cambridge UK PlanetLab Metting Cambridge UK May 14, 2004 (extracts from a PAM 2004 presentation)

  2. Global Research and Education Networks (GREN) Schematic is Highly Simplified! GREN contains over 1100 ASNs Abilene has 70 BGP neighbors, and 650 downstream ASNs

  3. Traffic between GREN nodes tends to stay on the GREN

  4. Mapping PlanetLab Hosts and Sites to GREN and Commercial Internet • So more than 70% of traffic between PlanetLab hosts is carried on the GREN (0.85 * 0.85 = 0.7225). Using 276 production hosts of Jan. 15, 2004 MOAS = multiple origin ASNs Notes: These results assume that research to research traffic is carried on GREN, which traceroute experiments seem to verify. Mapping used 20 BGP tables and associated host IP addresses with best match routes, which give originating ASN. Research ASNs were extracted from Abilene routing table (obtained from Route-Views).

  5. Geography • more about 60% of traffic between PlanetLab hosts is carried on the Abilene/Geant corner of the GREN (0.78 * 0.78 = 0.6084). LA = Latin America AP = Asia Pacific (including Australia) EMEA = Europe, Middle East, and Africa NA = North America

  6. C Moscow State U B Intel Berkeley A B HP Palo Alto 201 ms 4 ms C A 257 ms A “Bad Triangle” …

  7. Cable & Wireless CAIS Telefonica AT&T Above Net … and its routing RBNet C B A

  8. Look at all “triangles” r = a/(b+c) * (1 + (a – (b + c))) a = longest side

  9. Closer look at violators

  10. Observations • The majority of PlanetLab nodes currently sit in the GREN corner of the Internet. In fact, they largely sit in the Internet2/Dante corner of the GREN. • This has implications for measurement studies. • Forwarding paths between PlanetLab nodes are (currently) not as complex and convoluted as those on the “wide wide Internet” • The GREN has a large amount of network diversity that is currently not experienced by PlanetLab-PlanetLab traffic.

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