Name :   Lin Zhang
E-mail:  lz2110@columbia.edu

name of the project:

DiffServ measurement  / 2003 FALL



To check whether ISPs allows DSCPs (DiffServ code points) in IP packets to cross unaltered, 
I use the network of planetlab to did the measurement. My data sources include some
research universities and some labs from research companies .
I installed the application of iperf  for sending TCP and UDP packets with the DSCP filed set .
And then use the application of plabdump, a wrapper for tcpdump that can be used to observe
traffic based on TCP or UDP port, on planetlab nodes to observe those received DSCPs set packet . 
At Columbia campus, to observe the received packets, I set up a machine ethereal 
and on another machine use tcpdump to prints out the headers of the receive packets . 
I verified by using tcpdump that the iperf applications were setting the DSCP bits in the IP headers.


test enviroment :

PlanetLab nodes are 1.0GHz IA32, PIII class processor or greater , and currently run a Linux
distribution that is largely based on RedHat 7.3. 
They are connected to the public network with Fast Ethernet interface. 



File Directory:  
report12-12.pdf         a report in pdf virsion
report12-12.htm         a report in htm virsion
readme.txt
log                     some log information of the test