SDN第三次上机作业

1.创建以下拓扑（可采用任意方式）

创建拓扑的代码如下：

#! /usr/bin/python

from mininet.topo import Topo

from mininet.net import Mininet

from mininet.node import RemoteController,CPULimitedHost

from mininet.link import TCLink

class MyTopo(Topo):

    def __init__(self):

        Topo.__init__(self)

        # add switch

        sw1 = self.addSwitch('sw1')

        sw2 = self.addSwitch('sw2')
    
            # add host

        h1 = self.addHost('h1')

        h2 = self.addHost('h2')

        h3 = self.addHost('h3')

        h4 = self.addHost('h4')

        h5 = self.addHost('h5')

        h6 = self.addHost('h6')

        self.addLink(sw1, h1, 1, 1)

        self.addLink(sw1, h2, 2, 1)

        self.addLink(sw1, h3, 3, 1)  

        self.addLink(sw2, h4, 1, 1)

        self.addLink(sw2, h5, 2, 1)

        self.addLink(sw2, h6, 3, 1)

        self.addLink(sw1, sw2, 4, 4)

topos = { 'mytopo': ( lambda: MyTopo() ) }