Simulation Experiments

 

In this section, we present the results of several simulation experiments, each of which is designed to test a different aspect of Network Border Patrol. The first set of experiments examines the ability of NBP to prevent congestion collapse, and the second set of experiments examines its ability to provide fair bandwidth allocations to competing network flows. All simulations were run for 100 seconds using the UC Berkeley/LBNL/VINT ns-2 simulator [13]. The ns-2 code implementing NBP and the scripts to run these simulations are available at the UCI Network Research Group web site [14]. Default simulation parameters are shown in Table 1 and are used in all simulation experiments unless otherwise noted.

Table 1: Default simulation parameters

Simulation parameter	Value
Packet size	1000 bytes
Router queue size	100 packets
Maximum segment size (MSS)	1500 bytes
TCP implementation	Reno [12]
TCP window size	100 kbytes
MRC factor (MF)	10
AsynchInterval	10 msec
TSW window size	10 msec
End-system-to-edge propagation delay	100 $\mu$sec
End-system-to-edge link bandwidth	10 Mbps