SDN第二次上机作业

作业链接

安装floodlight

教程

打开网页localhost:8080/ui/pages/index.html

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() ) }

结果：

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

初始连通性：

下发具有hardtime的流表：

测试结果：