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  • 2019 SDN上机第2次作业

    1. 利用mininet创建如下拓扑,要求拓扑支持OpenFlow 1.3协议,主机名、交换机名以及端口对应正确,请给出拓扑Mininet执行结果,展示端口连接情况



    net查看端口情况

    pingall查看连接情况

    2. 直接在Open vSwitch下发流表,用vlan得到下列虚拟网段,请逐条说明所下发的流表含义

    将主机1,2,3进入s1的包打上vlan tag,转发端口4

    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098->vlan_vid,output:4
    

    将从端口4的包去除vlan tag, 并根据tag进行转发

    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=0,actions=pop_vlan,output:1
    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=1,actions=pop_vlan,output:2
    sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=2,actions=pop_vlan,output:3
    

    将主机4,5,6进入s2的包打上vlan tag,转发端口4

    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097->vlan_vid,output:4
    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098->vlan_vid,output:4
    

    将从端口4的包去除vlan tag, 并根据tag进行转发

    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=0,actions=pop_vlan,output:1
    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=1,actions=pop_vlan,output:2
    sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=2,actions=pop_vlan,output:3
    

    3. 直接在Open vSwitch查看流表,提交OVS命令执行结果

    输入以下命令查看流表

     sudo ovs-ofctl -O OpenFlow13 dump-flows s1 
     sudo ovs-ofctl -O OpenFlow13 dump-flows s2
    

    4. 提交主机连通性测试结果,验证流表的有效性

    5. 利用Wireshark抓包,分析验证特定报文

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  • 原文地址:https://www.cnblogs.com/xgsw/p/11808559.html
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