from mininet.cli import CLI
from mininet.net import Mininet
from mininet.link import TCLink
from mininet.topo import Topo
from mininet.log import setLogLevel

class CustomTopo(Topo):
    def __init__(self, **opts):
        Topo.__init__(self, **opts)

        # Agrega Hosts
        h1 = self.addHost('h1')
        h2 = self.addHost('h2')

        # Agrega Switches
        s1 = self.addSwitch('s1')
        s2 = self.addSwitch('s2')

        # Agrega Links
        self.addLink(h1, s1)
        self.addLink(h2, s2)

        self.addLink(s2, s3, bw=20, delay='200ms',loss=1)
        
if __name__ == '__main__':
    setLogLevel( 'info' )

    # Create data network
    topo = CustomTopo()
    net = Mininet(topo=topo, link=TCLink, autoSetMacs=True,
           autoStaticArp=True)

    # Run network
    net.start()
    CLI( net )
    net.stop()