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  • 2019 SDN上机第6次作业

    1.实验拓扑

    拓扑

    py

    from mininet.topo import Topo
    class MyTopo(Topo):
        def __init__(self):
            Topo.__init__(self)
            h1 = self.addHost('h1')
            h2 = self.addHost('h2')
            h3 = self.addHost('h3')
            h4 = self.addHost('h4')
            h5 = self.addHost('h5')
            h6 = self.addHost('h6')
            s1 = self.addSwitch('s1')
            s2 = self.addSwitch('s2')
            self.addLink(h1, s1, 1, 1)
            self.addLink(h2, s1, 1, 2)
            self.addLink(h3, s1, 1, 3)
            self.addLink(s1, s2, 4, 4)
            self.addLink(h4, s2, 1, 1)
            self.addLink(h5, s2, 1, 2)
            self.addLink(h6, s2, 1, 3)
    topos = {'mytopo': (lambda: MyTopo())}
    

    运行py

    sudo mn --custom x.py --topo mytopo --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13

    连接ryu并查看连通性

    ryu-manager ofctl_rest.py

    2.使用Ryu的REST API下发流表实现和第2次实验同样的VLAN

    编写shell

    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "in_port":1
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4096            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "in_port":2
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
    
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4097            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "in_port":3
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4098            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "dl_vlan": "0"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 1
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "dl_vlan": "1"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 2
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 1,
        "priority":1,
        "match":{
            "dl_vlan": "2"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 3
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "in_port":1
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4096            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "in_port":2
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4097            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "in_port":3
        },
        "actions":[
            {
                "type": "PUSH_VLAN",     # s1将从主机发来的数据包打上vlan_tag
                "ethertype": 33024       # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
            },
            {
                "type": "SET_FIELD",
                "field": "vlan_vid",     # 设置VLAN ID
                "value": 4098            # 设置vlan_id的值
            },
            {
                "type": "OUTPUT",
                "port": 4
            }
        ]
    }' http://127.0.0.1:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "dl_vlan": "0"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 1
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "dl_vlan": "1"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 2
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    
    curl -X POST -d '{
        "dpid": 2,
        "priority":1,
        "match":{
            "dl_vlan": "2"
        },
        "actions":[
            {
                "type": "POP_VLAN",     # 给进入交换机的包去除 vlan_tag
            },
            {
                "type": "OUTPUT",
                "port": 3
            }
        ]
    }' http://localhost:8080/stats/flowentry/add
    

    执行脚本

    查看s1,s2流表

    pingall

    3.对比两种方法,写出你的实验体会

    这两种方法都体现了流表的灵活性,体现了SDN的优势,相比于第二次实验,这次试验使用Ryu实现VLAN,代码的可视性好,且相比于第二次实验,容错率更高,易于修改,就算错了也不需要从头来过。

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  • 原文地址:https://www.cnblogs.com/Eason-Xu/p/12005352.html
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