DCTCP Assignment

Adapted from https://github.com/mininet/mininet-tests

I. Kernel and Mininet Installation

1. Dependecies

• Ubuntu Server 12.04.0 i386 (http://old-releases.ubuntu.com/releases/12.04.0/ubuntu-12.04-alternate-i386.iso)

2. Instructions to install DCTCP kernel:

su -
mv linux-* /usr/src
cd /usr/src
tar -xjf linux-headers-3.2.18-dctcp.tar
dpkg -i linux-image-3.2.18-dctcp_3.2.18-dctcp-10.00.Custom_amd64.deb
dpkg -i linux-headers-3.2.18-dctcp_3.2.18-dctcp-10.00.Custom_amd64.deb
update-grub2
reboot

3. Examine the installation

• After reboot, check if DCTCP has been correctly installed:

sysctl -a | grep tcp_dctcp

4. Install mininet and other tools

• If a package cannot be installed, find out how to install it by source code!

sudo apt-get install mininet tcpdump bwm-ng openssh-server cgroup-bin python-termcolor

• Reconfigure openvswitch (only if you haven't done it when installing mininet)

sudo dpkg-reconfigure openvswitch-datapath-dkms

5. Prepare for the mininet

• Create symbolic link for openvswitch controller

cd /usr/bin
sudo ln /usr/bin/ovs-controller /usr/bin/controller

• Restart all controllers

  ps aux | grep osv-
  sudo kill -9 <all osv-* processes>
  sudo service openvswitch-switch start

• Check if Mininet is working fine

  sudo reboot
  sudo mn --link tc,bw=100 --test iperf

II. Instructions to the DCTCP experiment:

• To run the dctcp experiments:

  cd dctcp_assignment
  ./run-dctcp.sh

• You can change the running mode (TCP, ECN, DCTCP) by editing the run-dctcp.sh file.

• All the outputs and plots are stored in [a]-n[b]-bw[c] directories where [a] is the running mode, [b] is the number of hosts and [c] is the network throughput.