Bob Lantz
70 lines
1.9 KiB
Python
Executable File
70 lines
1.9 KiB
Python
Executable File
#!/usr/bin/python
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"""
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natnet.py: Example network with NATs
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h0
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s0
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----------------
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nat1 nat2
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s1 s2
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h1 h2
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"""
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from mininet.topo import Topo
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from mininet.net import Mininet
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from mininet.nodelib import NAT
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from mininet.log import setLogLevel
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from mininet.cli import CLI
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from mininet.util import irange
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class InternetTopo(Topo):
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"Single switch connected to n hosts."
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def __init__(self, n=2, **opts):
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Topo.__init__(self, **opts)
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# set up inet switch
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inetSwitch = self.addSwitch('s0')
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# add inet host
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inetHost = self.addHost('h0')
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self.addLink(inetSwitch, inetHost)
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# add local nets
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for i in irange(1, n):
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inetIntf = 'nat%d-eth0' % i
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localIntf = 'nat%d-eth1' % i
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localIP = '192.168.%d.1' % i
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localSubnet = '192.168.%d.0/24' % i
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natParams = { 'ip' : '%s/24' % localIP }
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# add NAT to topology
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nat = self.addNode('nat%d' % i, cls=NAT, subnet=localSubnet,
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inetIntf=inetIntf, localIntf=localIntf)
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switch = self.addSwitch('s%d' % i)
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# connect NAT to inet and local switches
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self.addLink(nat, inetSwitch, intfName1=inetIntf)
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self.addLink(nat, switch, intfName1=localIntf, params1=natParams)
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# add host and connect to local switch
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host = self.addHost('h%d' % i,
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ip='192.168.%d.100/24' % i,
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defaultRoute='via %s' % localIP)
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self.addLink(host, switch)
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def run():
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"Create network and run the CLI"
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topo = InternetTopo()
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net = Mininet(topo=topo)
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net.start()
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CLI(net)
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net.stop()
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if __name__ == '__main__':
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setLogLevel('info')
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run()
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