topology creation file for nyu lab

my_topology.py

#!/usr/bin/python"""This setup the topology in lab4"""

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import Controller, RemoteController
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.util import dumpNodeConnections
from mininet.link import Link, Intf, TCLink
import os 
from time import sleep
import sys

class Topology(Topo):

def __init__(self):

    "Create Topology."
    # Initialize topology
    Topo.__init__(self)

    
    # Add hosts
    host1 = self.addHost('h1', ip='10.0.0.1/24', mac='10:00:00:00:00:01')
    host2 = self.addHost('h2', ip='10.0.0.2/24', mac='10:00:00:00:00:02')
    host3 = self.addHost('h3', ip='10.0.0.3/24', mac='10:00:00:00:00:03')
    host4 = self.addHost('h4', ip='10.0.0.4/24', mac='10:00:00:00:00:04')

    # Add switches
    sw1 = self.addSwitch('s1')
    sw2 = self.addSwitch('s2')
    sw3 = self.addSwitch('s3')
    sw4 = self.addSwitch('s4')

    self.addLink(host1, sw1, 1, 1)
    self.addLink(host2, sw2, 1, 1)
    self.addLink(host3, sw3, 1, 1)
    self.addLink(host4, sw4, 1, 1)
    self.addLink(sw1, sw2, 2, 3)
    self.addLink(sw2, sw3, 2, 3)
    self.addLink(sw3, sw4, 2, 3)
    self.addLink(sw4, sw1, 2, 3)

    # This is for "mn --custom"
    topos = { 'mytopo': ( lambda: Topology() ) }