lab1.py

lab.py

#!/usr/bin/env python

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.cli import CLI

class Lab1Topology(Topo):
  def __init__(self):
    Topo.__init__(self)
    
    # Add our hosts
    self.user1 = self.addHost('user1')
    self.user2 = self.addHost('user2')
    self.laptop = self.addHost('laptop')
    self.phone = self.addHost('phone')
    self.ipad = self.addHost('ipad')
    self.server1 = self.addHost('server1')
    self.server2 = self.addHost('server2')

    # Add our switches 
    self.sw1 = self.addSwitch('sw1')
    self.sw2 = self.addSwitch('sw2')
    self.sw3 = self.addSwitch('sw3')

    # Define the links between the switches
    self.addLink(self.sw1, self.sw2)
    self.addLink(self.sw2, self.sw3)

    # Define the links from hosts to sw1
    sw1Links = [
      self.user1, self.user2, self.laptop
    ]
    for l in sw1Links:
      self.addLink(l, self.sw1)

    # Define links from hosts to sw2 
    sw2Links = [
      self.phone, self.ipad
    ]
    for l in sw2Links:
      self.addLink(l, self.sw2)
      
    # Define links from hosts to sw3
    sw3Links = [
      self.server1, self.server2
    ]
    for l in sw3Links:
      self.addLink(l, self.sw3)
    self.addLink(self.server2, self.sw3, delay=50)

if __name__ == "__main__": 
  # Create our topo & run mininet
  topo = Lab1Topology()
  net = Mininet( topo=topo )
  net.start()

  CLI(net)
  net.stop()