project.py

"""Custom topology example
Two directly connected switches plus a host for each switch:
 host --- switch --- switch --- host
Adding the 'topos' dict with a key/value pair to generate our newly defined
topology enables one to pass in '--topo=mytopo' from the command line.
"""
from mininet.topo import Topo

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

		# Initialize topology
		Topo.__init__( self )

		# Add hosts
		h1 = self.addHost("h1")
		h2 = self.addHost("h2")


		#add switches
		switch = self.addSwitch("s0")

		# Add links
		self.addLink( switch, h1)
		self.addLink( switch, h2)


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