PingER (Ping End-to-end Reporting) is the name given to the Internet End-to-end Performance Measurement (IEPM) project to monitor end-to-end performance of Internet links. The project now involves hundreds of sites in many countries all over the world and we are actively seeking new partners for this project.
http://www.rnoc.gatech.edu/pinger2/
http://confluence.slac.stanford.edu/display/IEPM/PingER2+at+SLAC