Mininet topology

mininet.py

#!/usr/bin/python
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import Controller

class MyTopo( Topo):
	"Simple topology example."
	def __init__( self ):
		"Create custom topo." # initialize topology
		Topo.__init__( self )

		# Hosts
		leftHost = self.addHost(‘H1’)
		rightHost = self.addhost(‘H2’)
		
		# Switches
		S1 = self.addSwitch(‘S1’)
		S2 = self.addSwitch(‘S2’)
		S3 = self.addSwitch(‘S3’)
		S4 = self.addSwitch(‘S4’)
		S5 = self.addSwitch(‘S5’)

		# Links
		self.addLink(leftHost, S1)
		self.addLink(S1, S3)
		self.addlink(S1, S2)
		self.addLink(S2, S4)
		self.addLink(S4, S5)
		self.addLink(S3, S5)
		self.addLink(S5, rightHost)

topos = {'mytopo':(lambda:MyTopo())}