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Packet train experiments in DIMES and ETOMIC

Packet train experiments in DIMES and ETOMIC. Ohad Serfaty Joszef Steger May 2006. Preview. PacketTrain Measurements Results and Difficulties Solutions Future work. PacketTrain measurement scheme. UDP Packets. Port 7777. Results are compressed and uploaded. Dimes Server.

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Packet train experiments in DIMES and ETOMIC

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  1. Packet train experiments in DIMES and ETOMIC Ohad Serfaty Joszef Steger May 2006

  2. Preview • PacketTrain Measurements • Results and Difficulties • Solutions • Future work

  3. PacketTrain measurement scheme UDP Packets Port 7777 Results are compressed and uploaded Dimes Server Etomic Agents Dimes Agents

  4. Measurement automation • Agents receive a script with Traceroutes commands and PacketTrain commands • Etomic Agents receive a script with a listen command • At the end of the listening period – The Etomic agents compress the results and send it to DIMES • Results are inserted into the databases , spanning trees are created • Tomography

  5. PacketTrain experiment design • Agents are picked , one from each user • Etomic nodes are picked • Each agent sends 10000 packet trains , in intervals of 50ms-100ms

  6. PacketTrain experiments • We conducted 4 full experiments • 2 Partial experiments • 10/5/2006 - • 11/5/2006 • 140 Dimes Agents , 4 Etomic nodes • 2 Large scale experiments • 28/5/2006 • 30/5/2006 • 241 Dimes Agents , 9 Etomic nodes

  7. Results - Agent 4827

  8. Results - Agent 4827

  9. Spanning tree – Agent 5245

  10. Messy Time series

  11. Messy Time series

  12. Messy Spanning Tree

  13. Geographic span

  14. Tomography requirements • Well behaved time series • Well behaved Traceroute spanning tree • Exact match between Agent and IP

  15. Analysis obstacles • Indefinite slope in time series • Too many packets from the same IP • Traceroute data is corrupt • No accurate matching between Agent and IP address • Solution : Traceroute back to the client

  16. Java Network Stack • Encapsulated Packet send / receive • Cross platform : windows , Linux , Mac and Etomic • Java - Write once run anywhere • Will be the base of future DIMES measurements • Traceroute back to the Agent

  17. IP to agent matching

  18. IP to agent matching

  19. IP to agent matching

  20. IP to agent matching

  21. Future work • Add Agent id to Packet train module • Tomography analysis • Install a measurement infrastructure similar to DIMES on colbud cluster

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