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from mininet.topo import Topo class CustomTopology(Topo): def build(self): # Create top-level switch top_switch = self.addSwitch('s1') # Create lower-level switches and connect them to the top-level switch lower_switches = [] for i in range(1, 5): lower_switch = self.addSwitch('s{}'.format(i + 1)) self.addLink(top_switch, lower_switch) lower_switches.append(lower_switch) # Create hosts and connect them to each lower-level switch for switch in lower_switches: for j in range(1, 9): host = self.addHost('h{}_{}'.format(switch[1:], j)) self.addLink(switch, host) topology = CustomTopology() topology.build()
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