SDN第二次上机作业

安装floodlight

生成拓扑并连接控制器floodlight，利用控制器floodlight查看图形拓扑

#!/usr/bin/python

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import RemoteController,CPULimitedHost
from mininet.link import TCLink
from mininet.util import dumpNodeConnections

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

def __init__( self ):
"Create custom topo."

# Initialize topology
Topo.__init__( self )

#add hosts
host1 = self.addHost('h1')
host2 = self.addHost('h2')
host3 = self.addHost('h3')

#add switch
switch1 = self.addSwitch('s1')
switch2 = self.addSwitch('s2')
switch3 = self.addSwitch('s3')
switch4 = self.addSwitch('s4')

#add link
self.addLink(host1,switch2,1,1)
self.addLink(host2,switch3,1,1)
self.addLink(host3,switch4,1,1)
self.addLink(switch1,switch2,1,2)
self.addLink(switch1,switch3,2,2)
self.addLink(switch1,switch4,3,2)

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

利用字符界面下发流表，使得‘h1’和‘h2’ ping 不通

利用字符界面下发流表，通过测试‘h1’和‘h3’的联通性，来验证openflow的hardtime机制