SDN第二次上机作业

1、安装floodlight
2、生成拓扑并连接控制器floodlight，利用控制器floodlight查看图形拓扑
（1）代码：
from mininet.topo import Topo

class MyTopo( Topo ):
"Simple topology example."

def __init__( self ):

    # Initialize topology
    Topo.__init__( self )
    
    s1 = self.addSwitch(‘s1‘)
    s2 = self.addSwitch(‘s2‘)
    s3 = self.addSwitch(‘s3‘)
    s4 = self.addSwitch(‘s4‘)

    h1 = self.addHost(‘h1‘)
    h2 = self.addHost(‘h2‘)
    h3 = self.addHost(‘h3‘)

    self.addLink(h1,s2,1,1)
    self.addLink(h2,s3,1,1)
    self.addLink(s2,s1,2,1)
    self.addLink(s3,s1,2,2)
    self.addLink(s1,s4,3,1)
    self.addLink(s4,h3,2,1)

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

（2）命令行

（3）floodlight生成的拓扑结构