mininet_topology.py

from mininet.node import CPULimitedHost
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.log import setLogLevel, info
from mininet.node import RemoteController
from mininet.cli import CLI

#4 switches and 4 hosts. They are connected in a star shape.


class SimplePktSwitch(Topo):
    """Simple topology example."""

    def __init__(self, **opts):
        """Create custom topo."""

        super(SimplePktSwitch, self).__init__(**opts)

        # Hostlar Ekleniyor.
        h1 = self.addHost('h1')
        h2 = self.addHost('h2')
        h3 = self.addHost('h3')
        h4 = self.addHost('h4')

        # Switchler Ekleniyor.
        s1 = self.addSwitch('s1', dpid="0000000000000001")
        s2 = self.addSwitch('s2', dpid="0000000000000002")
        s3 = self.addSwitch('s3', dpid="0000000000000003")
        s4 = self.addSwitch('s4', dpid="0000000000000004")

        # Add links
        self.addLink(h1, s1)
        self.addLink(h2, s2)
        self.addLink(h3, s3)
        self.addLink(h4, s4)

        self.addLink(s1, s2)
        self.addLink(s1, s3)
        self.addLink(s1, s4)


def run():
    c = RemoteController('c', '0.0.0.0', 6633)
    net = Mininet(topo=SimplePktSwitch(), host=CPULimitedHost, controller=None)
    net.addController(c)
    net.start()

    CLI(net)
    net.stop()

if __name__ == '__main__':
    setLogLevel('info')
    run()