2019 SDN上机第2次作业

旧街凉风 提交于 2020-01-13 12:51:47

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


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

sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:4
//转发S1端口1的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:4
//转发S1端口2的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098-\>vlan_vid,output:4
//转发S1端口3的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=0,actions=pop_vlan,output:1
//转发S1端口4的包到端口1,并去除vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=1,actions=pop_vlan,output:2
//转发S1端口4的包到端口2,并去除vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s1 priority=1,dl_vlan=2,actions=pop_vlan,output:3
//转发S1端口4的包到端口3,并去除vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=1,actions=push_vlan:0x8100,set_field:4096-\>vlan_vid,output:4
//转发S2端口1的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=2,actions=push_vlan:0x8100,set_field:4097-\>vlan_vid,output:4
//转发S2端口2的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,in_port=3,actions=push_vlan:0x8100,set_field:4098-\>vlan_vid,output:4
//转发S2端口3的包到端口4,并打上vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=0,actions=pop_vlan,output:1
//转发S2端口4的包到端口1,并去除vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=1,actions=pop_vlan,output:2
//转发S2端口4的包到端口2,并去除vlan_tag
sudo ovs-ofctl -O OpenFlow13 add-flow s2 priority=1,dl_vlan=2,actions=pop_vlan,output:3
//转发S2端口4的包到端口3,并去除vlan_tag

3.直接在Open vSwitch查看流表,提交OVS命令执行结果

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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