一、基本实验

（1）执行ovs-vsctl show命令、以及p0和p1连通性测试的执行结果截图

（2）开启Mininet CLI并执行pingall命令的截图、上述目录下查看OVS流表的命令结果截图，wireshark抓包截图

二、拓展实验

代码和执行结果截图

#!/usr/bin/env python

from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSController
from mininet.node import CPULimitedHost, Host, Node
from mininet.node import OVSKernelSwitch, UserSwitch
from mininet.node import IVSSwitch
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.link import TCLink, Intf
from subprocess import call

def myNetwork():

  net = Mininet( topo=None,
                 build=False,
                 ipBase='10.0.0.0/8')

  info( '*** Adding controller\n' )
  c0=net.addController(name='c0',
                    controller=Controller,
                    protocol='tcp',
                    port=6633)

  info( '*** Add switches\n')
  s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
  s2 = net.addSwitch('s2', cls=OVSKernelSwitch)

  info( '*** Add hosts\n')
  h1 = net.addHost('h1', cls=Host, ip='192.168.1.1', defaultRoute=None)
  h2 = net.addHost('h2', cls=Host, ip='192.168.1.2', defaultRoute=None)
  h3 = net.addHost('h3', cls=Host, ip='192.168.1.3', defaultRoute=None)
  h4 = net.addHost('h4', cls=Host, ip='192.168.1.4', defaultRoute=None)
  
  info( '*** Add links\n')
  net.addLink(h1, s1,1,1)
  net.addLink(h2, s1,1,2)
  net.addLink(s1, s2,3,3)
  net.addLink(s2, h4,2,1)
  net.addLink(s2, h3,1,1)
  
  info( '*** Starting network\n')
  net.build()
  info( '*** Starting controllers\n')
  for controller in net.controllers:
      controller.start()

  info( '*** Starting switches\n')
  net.get('s1').start([c0])
  net.get('s2').start([c0])

  info( '*** Post configure switches and hosts\n')
  #add ovsml
  s1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
  s1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
  s1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
  s1.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=1,actions=pop_vlan,output:2')
  s2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:3')
  s2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:3')
  s2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=0,actions=pop_vlan,output:1')
  s2.cmd(r'ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=1,actions=pop_vlan,output:2')



  CLI(net)
  net.stop()
if __name__ == '__main__':
  setLogLevel( 'info' )
  myNetwork()