Network Infrastructure
Internet 2: In all of our work we have assumed the availability of Internet 2 level service. Shortly after commencing the project we upgraded our connectivity from 100 Mb/s to 1 Gb/s. This involved a solution to the "last mile problem" upgrading the connectivity from the SUMMIT laboratory to the university's gateway, and then to the CENIC backbone.
Network Traffic Data: Network traffic conditions change by time of day and day of week. They also change as the network architecture evolves within the institution, regionally, and on the national and international backbone. In Fall 2004, we monitored network traffic over many weeks. The resulting time of day traffic patterns are shown on the graphs at the left.
The ability of our applications to adapt to network traffic conditions depends, in part, on the availability of data on current network conditions. We have made that data available by placing WeatherStation units available at key places in the network.