Inferring Queue Size by Active Measurement

Please help us with our active measurement networking experiment by following the appropriate directions for your OS. Feel free to send this to friends that might get a kick out of it or to try it out on different ISPs that you might have access to. However, please do not run this experiment on the WPI LAN, we are interested in commercial Internet access only. Any questions email us at jnick at cs.wpi.edu and claypool at cs.wpi.edu.

Thanks!

Jim Nichols
Mark Claypool

WPI Congestion Control Research Group


Windows Directions
  1. Open a command prompt
  2. Type "ipconfig /all"
  3. Find the line that says, "DNS Severs........", copy the first name/address listed.
    On most Windows systems to copy, highlight the name/address with the mouse and press "Enter"
  4. Type "ping -t (results of step 3) >> output.txt", then wait 10 seconds.
    You can either press the right mouse button to paste the name/address you copied in step 3, or manually enter it.
    examples:
  5. Open up an Internet Explorer window
  6. Download this http://www.cs.wpi.edu/~jnick/viper.tar by right-clicking on the link and selecting "Save target as..."
    Make sure that the download window will stay open when the download completes by un-checking the appropriate box
  7. Switch back to command prompt window, press Control-C to stop ping
  8. Report back via email to jnick at cs.wpi.edu and claypool cs.wpi.edu the following stats:
  9. Repeat steps 4-8 (2) additional times, appending the results into the same email. After the 3 runs of the experiment attach output.txt (created in step 4) to the email.

Linux/Unix Directions:
  1. Open a shell
  2. Type "cat /etc/resolv.conf"
  3. Copy the first IP address/name listed (after the words "nameserver")
    Usually to copy text you just need to highlight it with the mouse.
  4. Type "ping (results of step 3) >> output.txt", then wait 10 seconds
    You can paste the name/address by clicking the middle mouse button, or enter it manually.
    examples:
  5. Open another shell, or web browswer
  6. Download this file: http://www.cs.wpi.edu/~jnick/viper.tar.
    Use the command line utility "WGET", included with most Linux distributions.
    If you don't have it, go to http://www.gnu.org/software/wget/wget.html and download it.
    You might want to keep it when done, as WGET is a pretty useful tool to have.
  7. Switch back to shell running ping, press Control-C to stop pinging
  8. Report back via email to jnick at cs.wpi.edu and claypool at cs.wpi.edu the following stats:
  9. Repeat steps 4-8 (2) additional times, appending the results into the same email. After the 3 runs of the experiment attach output.txt (created in step 4) to the email.