optical-2.py
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#!/usr/bin/env python
''' file: custom/optical.py '''
from mininet.node import RemoteController
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.util import irange
switches = []
class OpticalTopo( Topo ):
def build( self, n=6, tapStart=29 ):
global switches
# Add hosts and switches
hosts = []
switches = []
for i in irange( 1, n ):
h = self.addHost( 'h%d' % i )
s = self.addSwitch( 's%d' % i, dpid='0000ffffffff%04d' % i )
self.addLink( h, s )
hosts.append( h )
switches.append( s )
# Add optical tap interfaces
tapNum = tapStart
#for sw in switches:
# self.addLink( sw, sw, intfName1='%s-eth0' % sw, intfName2='tap%d' % tapNum )
#Add tap interface up
#sudo ip link set dev tap25 up
# tapNum += 1
# if you use, sudo mn --custom custom/optical.py, then register the topo:
#sudo mn --custom ~/mininet/custom/optical-2.py --topo optical,6 --controller=remote
#sudo ./mininet/custom/optical-2.py
topos = { 'optical': OpticalTopo }
def installStaticFlows( net ):
for swName in [ 's1', 's2', 's3', 's4', 's5', 's6' ]:
info( 'Adding flows to %s...' % swName )
sw = net[ swName ]
sw.dpctl( 'add-flow', 'in_port=1,actions=output=2' )
sw.dpctl( 'add-flow', 'in_port=2,actions=output=1' )
info( sw.dpctl( 'dump-flows' ) )
def run():
net = Mininet( topo=OpticalTopo(), controller=RemoteController )
net.start()
#installStaticFlows( net )
tapStart = 29
for sw in switches:
net.get(sw).attach( 'tap%d' %tapStart )
tapStart += 1
CLI( net )
net.stop()
# if the script is run directly (sudo custom/optical.py):
if __name__ == '__main__':
setLogLevel( 'info' )
run()