Multipath TCP Test

http://csie.nqu.edu.tw/smallko/sdn/mptcp-test.htm

[Preparation]

Follow the instructions at https://multipath-tcp.org/pmwiki.php/Users/HowToInstallMPTCP?to install MPTCP into your Linux.

Reboot your computer and choose the correctkernel image to boot your computer

Make sure that you can see the followingmessage. If you cannot see it, it means that the your current linux does notsupport MPTCP

[Experiment Topology]

[Script]

#!/usr/bin/env python

from mininet.net import Mininet

from mininet.cli import CLI

from mininet.link import Link, TCLink,Intf

from subprocess import Popen, PIPE

from mininet.log import setLogLevel

if '__main__' == __name__:

  setLogLevel('info')

  net = Mininet(link=TCLink)

  key = "net.mptcp.mptcp_enabled"

  value = 1

  p = Popen("sysctl -w %s=%s" % (key, value), shell=True, stdout=PIPE, stderr=PIPE)

  stdout, stderr = p.communicate()

  print "stdout=",stdout,"stderr=", stderr

  h1 = net.addHost('h1')

  h2 = net.addHost('h2')

  r1 = net.addHost('r1')

  linkopt={'bw':10}

  net.addLink(r1,h1,cls=TCLink, **linkopt)

  net.addLink(r1,h1,cls=TCLink, **linkopt)

  net.addLink(r1,h2,cls=TCLink, **linkopt)

  net.addLink(r1,h2,cls=TCLink, **linkopt)

  net.build()

  r1.cmd("ifconfig r1-eth0 0")

  r1.cmd("ifconfig r1-eth1 0")

  r1.cmd("ifconfig r1-eth2 0")

  r1.cmd("ifconfig r1-eth3 0")

  h1.cmd("ifconfig h1-eth0 0")

  h1.cmd("ifconfig h1-eth1 0")

  h2.cmd("ifconfig h2-eth0 0")

  h2.cmd("ifconfig h2-eth1 0")

  r1.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")

  r1.cmd("ifconfig r1-eth0 10.0.0.1 netmask 255.255.255.0")

  r1.cmd("ifconfig r1-eth1 10.0.1.1 netmask 255.255.255.0")

  r1.cmd("ifconfig r1-eth2 10.0.2.1 netmask 255.255.255.0")

  r1.cmd("ifconfig r1-eth3 10.0.3.1 netmask 255.255.255.0")

  h1.cmd("ifconfig h1-eth0 10.0.0.2 netmask 255.255.255.0")

  h1.cmd("ifconfig h1-eth1 10.0.1.2 netmask 255.255.255.0")

  h2.cmd("ifconfig h2-eth0 10.0.2.2 netmask 255.255.255.0")

  h2.cmd("ifconfig h2-eth1 10.0.3.2 netmask 255.255.255.0")

  h1.cmd("ip rule add from 10.0.0.2 table 1")

  h1.cmd("ip rule add from 10.0.1.2 table 2")

  h1.cmd("ip route add 10.0.0.0/24 dev h1-eth0 scope link table 1")

  h1.cmd("ip route add default via 10.0.0.1 dev h1-eth0 table 1")

  h1.cmd("ip route add 10.0.1.0/24 dev h1-eth1 scope link table 2")

  h1.cmd("ip route add default via 10.0.1.1 dev h1-eth1 table 2")

  h1.cmd("ip route add default scope global nexthop via 10.0.0.1 dev h1-eth0")

  h2.cmd("ip rule add from 10.0.2.2 table 1")

  h2.cmd("ip rule add from 10.0.3.2 table 2")

  h2.cmd("ip route add 10.0.2.0/24 dev h2-eth0 scope link table 1")

  h2.cmd("ip route add default via 10.0.2.1 dev h2-eth0 table 1")

  h2.cmd("ip route add 10.0.3.0/24 dev h2-eth1 scope link table 2")

  h2.cmd("ip route add default via 10.0.3.1 dev h2-eth1 table 2")

  h2.cmd("ip route add default scope global nexthop via 10.0.2.1 dev h2-eth0")

  CLI(net)

  net.stop()

[Execution]

When mptcp is enabled.

Change “value = 0” to disable mptcp

[reference]

http://blog.mcchan.io/test-mptcp-with-mininet

Dr. Chih-Heng Ke (smallko@gmail.com)

Departmentof Computer Science and Information Engineering,

National Quemoy University, Kinmen,Taiwan.