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  • SDN2017 第三次实验作业

    实验目的


    在给定如上实验拓扑情况下,用vlan得到下列虚拟网段

    • h1--h4互通
    • h2--h5互通
    • h3--h6互通
    • 其余主机间无法通信

    实验步骤

    1. 创建拓扑

    #! /usr/bin/python
    
    from mininet.topo import Topo
    from mininet.net import Mininet
    from mininet.node import RemoteController,CPULimitedHost
    from mininet.link import TCLink
    
    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')
    
            # add link
    		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() ) }
    

    截图如下

    2.利用OVS命令下发流表,实现VLAN功能

    参考链接:http://blog.csdn.net/rocson001/article/details/73163041

    • switch1
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098->vlan_vid,output:4
    
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,dl_vlan=0,actions=pop_vlan,output:1
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,dl_vlan=1,actions=pop_vlan,output:2
    sudo ovs-ofctl -O OpenFlow13 add-flow sw1 priority=1,dl_vlan=2,actions=pop_vlan,output:3
    
    • switch2
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098->vlan_vid,output:4
    
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,dl_vlan=0,actions=pop_vlan,output:1
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,dl_vlan=1,actions=pop_vlan,output:2
    sudo ovs-ofctl -O OpenFlow13 add-flow sw2 priority=1,dl_vlan=2,actions=pop_vlan,output:3
    

    3.利用OVS命令查看流表

    • switch1
    $ sudo ovs-ofctl -O OpenFlow13 dump-flows sw1
    OFPST_FLOW reply (OF1.3) (xid=0x2):
     cookie=0x0, duration=3098.183s, table=0, n_packets=21, n_bytes=1302, priority=1,dl_vlan=2 actions=strip_vlan,output:3
     cookie=0x0, duration=3098.221s, table=0, n_packets=22, n_bytes=1348, priority=1,dl_vlan=0 actions=strip_vlan,output:1
     cookie=0x0, duration=3098.199s, table=0, n_packets=22, n_bytes=1348, priority=1,dl_vlan=1 actions=strip_vlan,output:2
     cookie=0x0, duration=3098.254s, table=0, n_packets=21, n_bytes=1218, priority=1,in_port=3 actions=push_vlan:0x8100,set_field:2->vlan_vid,output:4
     cookie=0x0, duration=3098.342s, table=0, n_packets=22, n_bytes=1260, priority=1,in_port=1 actions=push_vlan:0x8100,set_field:0->vlan_vid,output:4
     cookie=0x0, duration=3098.308s, table=0, n_packets=22, n_bytes=1260, priority=1,in_port=2 actions=push_vlan:0x8100,set_field:1->vlan_vid,output:4
     cookie=0x0, duration=3934.114s, table=0, n_packets=1362, n_bytes=219298, priority=0 actions=CONTROLLER:65535
    
    • switch2
    $ sudo ovs-ofctl -O OpenFlow13 dump-flows sw2
    OFPST_FLOW reply (OF1.3) (xid=0x2):
     cookie=0x0, duration=3132.991s, table=0, n_packets=21, n_bytes=1302, priority=1,dl_vlan=2 actions=strip_vlan,output:3
     cookie=0x0, duration=3136.604s, table=0, n_packets=22, n_bytes=1348, priority=1,dl_vlan=0 actions=strip_vlan,output:1
     cookie=0x0, duration=3136.593s, table=0, n_packets=22, n_bytes=1348, priority=1,dl_vlan=1 actions=strip_vlan,output:2
     cookie=0x0, duration=3136.626s, table=0, n_packets=21, n_bytes=1218, priority=1,in_port=3 actions=push_vlan:0x8100,set_field:2->vlan_vid,output:4
     cookie=0x0, duration=3136.667s, table=0, n_packets=22, n_bytes=1260, priority=1,in_port=1 actions=push_vlan:0x8100,set_field:0->vlan_vid,output:4
     cookie=0x0, duration=3136.654s, table=0, n_packets=22, n_bytes=1260, priority=1,in_port=2 actions=push_vlan:0x8100,set_field:1->vlan_vid,output:4
     cookie=0x0, duration=3973.664s, table=0, n_packets=1394, n_bytes=225662, priority=0 actions=CONTROLLER:65535
    

    4.验证性测试

    5.Wireshark抓包验证

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  • 原文地址:https://www.cnblogs.com/tr3e/p/8322077.html
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