2019 SDN上机第六次作业

1.实验拓扑

(1)实验拓扑

(2)使用python脚本完成拓扑搭建

from mininet.topo import Topo
class Mytopo(Topo):
def __init__(self):
    Topo.__init__(self)
    s=[]
    for i in range(2):
     sw = self.addSwitch('s{}'.format(i+1))
     s.append(sw)
    self.addLink(s[0],s[1])
    count=1
    for two in s:
     for i in range(3):
      host = self.addHost('h{}'.format(count))
      self.addLink(two,host)
      count += 1
topos = {'mytopo': (lambda:Mytopo())}

(3)建立拓扑，查看连通性

2.使用Ryu的REST API下发流表实现和第2次实验同样的VLAN

编写以下sh脚本

#端口号1发来数据
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

#端口号2发来数据
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

#端口号3发来数据
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



#向端口1转发
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

#向端口2转发
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

#向端口3转发
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

#端口号1发来数据
curl -X POST -d '{
"dpid": 2,
"priority":1,
"match":{
    "in_port":1
},
"actions":[
    {
        "type": "PUSH_VLAN",     # s2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": 5096            # 设置vlan_id的值
    },
    {
        "type": "OUTPUT",
        "port": 4
    }
]
}' http://127.0.0.1:8080/stats/flowentry/add

#端口号2发来数据
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": 5097            # 设置vlan_id的值
    },
    {
        "type": "OUTPUT",
        "port": 4
    }
]
}' http://127.0.0.1:8080/stats/flowentry/add

#端口号3发来数据
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": 5098            # 设置vlan_id的值
    },
    {
        "type": "OUTPUT",
        "port": 4
    }
]
}' http://127.0.0.1:8080/stats/flowentry/add



#向端口1转发
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

#向端口2转发
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

#向端口3转发
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

运行脚本

sudo sh ./all.sh

查看流表

使用pingall查看连通性

3.对比两种方法，写出你的实验体会

用shell脚本储存在文件里用代码形式的改的话会比较方便吧，一开始拓扑建错了，后面才重新修改进行补救