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  • 2019 SDN上机第一次作业

    1.安装轻量级网络仿真工具Mininet

    推荐github上的Mininet源安装

    git clone https://github.com/mininet/mininet.git
    cd mininet/util
    ./install.sh
    


    2.用字符命令搭建如下拓扑,要求写出命令

    sudo mn --topo linear,3

    sudo mn --topo tree , fanout=3, depth=2

    3. 利用可视化工具搭建如下拓扑,并要求支持OpenFlow 1.0 1.1 1.2 1.3,设置h1(10.0.0.10)、h2(10.0.0.11)、h3(10.0.0.12),拓扑搭建完成后使用命令验证主机ip,查看拓扑端口连接情况。

    命令行打开可视化工具

    cd  mininet
    cd  examples
    sudo  ./miniedit.py
    


    可视化搭建

    h1IP地址填写

    net命令查看

    使用命令验证主机ip,查看拓扑端口连接情况

    4.利用Python脚本完成如下图所示的一个Fat-tree型的拓扑(交换机和主机名需与图中一致,即s1s6,h1h8,并且链路正确,请给出Mininet相关截图)

    python代码

    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 )
            L1 = 2
            L2 = L1 * 2 
            c = []
            a = []
              
            # add core ovs  
            for i in range( L1 ):
                    sw = self.addSwitch( 'c{}'.format( i + 1 ) )
                    c.append( sw )
        
            # add aggregation ovs
            for i in range( L2 ):
                    sw = self.addSwitch( 'a{}'.format( L1 + i + 1 ) )
                    a.append( sw )
        
           
            # add links between core and aggregation ovs
            for i in range( L1 ):
                    sw1 = c[i]
                    for sw2 in a[i/2::L1/2]:
                self.addLink( sw2, sw1 )
     
            
            #add hosts and its links with edge ovs
            count = 1
            for sw1 in a:
                    for i in range(2):
                        host = self.addHost( 'h{}'.format( count ) )
                        self.addLink( sw1, host )
                        count += 1
    topos = { 'mytopo': ( lambda: MyTopo() ) }
    

    命令行运行

     sudo  mn  --custom test1.py  --topo  mytopo  --switch  ovsk, protocols=OpenFlow10
    

    net命令查看

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  • 原文地址:https://www.cnblogs.com/wangerfu/p/11783825.html
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