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from mininet.net import Mininet
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from mininet.node import Node
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from mininet.cli import CLI
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from mininet.link import TCLink
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from mininet.log import setLogLevel
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class MyRouter (Node):
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def config(self, **params):
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super(MyRouter, self).config(**params)
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self.cmd('sysctl net.ipv4.ip_forward=1') #Enable forwarding on the router
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def terminate(self):
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self.cmd('sysctl net.ipv4.ip_forward=0') #Disable forwarding on the router
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super(MyRouter, self).terminate
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def run_topology(config_file):
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setLogLevel('info') #Different logging levels are 'info' 'warning' 'error' 'debug'
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net = Mininet(link=TCLink)
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# Create a host with the desired interface and IP
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host3 = net.addHost('h4', ip='150.152.40.131/26')
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host3.setDefaultRoute('via 150.152.40.129')
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host4 = net.addHost('h3', ip='150.152.40.194/30')
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host4.setDefaultRoute('via 150.152.40.193')
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# Create a router with two interfaces and default routes
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router2 = net.addHost('r2', cls=MyRouter)
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# Add interfaces to the router
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# net.addLink(router2, host3, intfName1='r33', intfName2='h31', params1={'ip': '161.46.247.195/24'}, params2={'ip': '161.46.247.196/24'})
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# net.addLink(router, intfName1='r21', params1={'ip': '161.46.247.129/30'})
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# Set the default routes on the router
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# router2.cmd('ip route add default via 161.46.247.254 dev r33')
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# router2.cmd('ip route add default via 161.46.247.130 dev r21')
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net.start() #Starting the network
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net.pingAll()
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CLI(net)
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net.stop() #Stopping the network
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if __name__ == '__main__':
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run_topology('MininetTopo.conf')
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# def build_topology(config_file):
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# topo = Topo()
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# # Create a host with the desired interface and IP
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# hh = topo.addHost('h1', ip='161.46.247.196/24', defaultRoute='via 161.45.247.195')
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# hh.setDefaultRoute = ''
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# topo.addHost('h2', ip='161.46.247.197/24', defaultRoute='via 161.45.247.195')
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# # Create a router with an interface and default route
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# topo.addNode('r1', cls=MyRouter, ip='161.46.247.195/24')
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# # Add a link between the host and router
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# topo.addLink('h1', 'r1')
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# topo.addLink('h2', 'r1')
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# return topo
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# class MyTopo (Topo):
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# def build( self, *args, **params ):
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# host = self.addHost('h1', ip='161.46.247.196/24')
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# host.setDefaultRoute('via 161.45.247.195')
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# self.addHost('h2')
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# self.addNode('r1', cls=MyRouter)
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# self.addLink('h1', 'h2')
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# # self.addLink('h1', 'r1', intfName1='H11', intfName2='R11', params1={'ip' : '161.46.247.131/26'}, params2={'ip' : '161.46.247.129/26'})
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# # self.addLink('h2', 'r1', intfName1='H21', intfName2='R12', params1={'ip' : '161.46.247.196/27'}, params2={'ip' : '161.46.247.195/27'})
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