#!/usr/bin/python

"""

This example creates a multi-controller network from semi-scratch by

using the net.add*() API and manually starting the switches and controllers.

This is the "mid-level" API, which is an alternative to the "high-level"

Topo() API which supports parametrized topology classes.

Note that one could also create a custom switch class and pass it into

the Mininet() constructor.

"""

from mininet.net import Mininet

from mininet.node import Controller, OVSSwitch

from mininet.cli import CLI

from mininet.log import setLogLevel

def multiControllerNet():

"Create a network from semi-scratch with multiple controllers."

net = Mininet( controller=Controller, switch=OVSSwitch, build=False )

print "*** Creating (reference) controllers"

c1 = net.addController( 'c1', port=6633 )

c2 = net.addController( 'c2', port=6634 )

print "*** Creating switches"

s1 = net.addSwitch( 's1' )

s2 = net.addSwitch( 's2' )

print "*** Creating hosts"

hosts1 = [ net.addHost( 'h%d' % n ) for n in 3, 4 ]

hosts2 = [ net.addHost( 'h%d' % n ) for n in 5, 6 ]

print "*** Creating links"

for h in hosts1:

net.addLink( s1, h )

for h in hosts2:

net.addLink( s2, h )

net.addLink( s1, s2 )

print "*** Starting network"

net.build()

c1.start()

c2.start()

s1.start( [ c1 ] )

s2.start( [ c2 ] )

print "*** Testing network"

net.pingAll()

print "*** Running CLI"

CLI( net )

print "*** Stopping network"

net.stop()

if __name__ == '__main__':

setLogLevel( 'info' ) # for CLI output

multiControllerNet()