Computer Science Department
McGregory Hall, 3rd Floor
13 Oak Drive
Hamilton, NY 13346
Charlotte Jablonski, Administrative Assistant
Start: Tuesday, September 25, 2012, 11:30 a.m.
End: Tuesday, September 25, 2012, noon
Location: CS Department Lounge
Title: The Effects of Multipath IP Routing on TCP Performance
Speaker: Rohan Mehta '14
Over the summer, I studied the impact of using multiple paths for routing in the IP layer. Multiple paths could improve performance by better utilising the resources in the network, but it could also negatively affect performance because of TCP congestion control mechanisms. To test this, we used a network simulator called ns2, which can be programmed using c++ and OTcl. We conducted thousands of trials and then parsed and analyzed the trace files generated by the simulator. We ran through a number of hypotheses and improved the automated systems we used to conduct tests. The simulations we conducted seemed to suggest that TCP performance is much better when routing is done using one path, unless the paths can somehow be constructed to have near-identical delays, which is impractical.