2019 SDN上机第6次作业

1.实验拓扑

实验拓扑
见2019 SDN上机第2次作业

使用Python脚本完成拓扑搭建，并连接ryu控制器。

#!/usr/bin/python
#创建网络拓扑
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 ):
    def __init__( self ):
        # Initialize topology
        Topo.__init__( self )

        # add switches  
        s1 = self.addSwitch('s1')
	s2 = self.addSwitch('s2')
    	# add hosts  
        h1 = self.addHost('h1')
        h2 = self.addHost('h2')
        h3 = self.addHost('h3')
	h4 = self.addHost('h4')
        h5 = self.addHost('h5')
        h6 = self.addHost('h6')

        # add links
        self.addLink(h1,s1,1,1)
        self.addLink(h2,s1,1,2)
        self.addLink(h3,s1,1,3)
        self.addLink(h4,s2,1,1)
        self.addLink(h5,s2,1,2)
        self.addLink(h6,s2,1,3)
        self.addLink(s1,s2,4,4)

topos = { 'mytopo': ( lambda: MyTopo() ) }

使用Python脚本完成拓扑搭建

连接ryu控制器

2.使用Ryu的REST API下发流表实现和第2次实验同样的VLAN

要求
编写脚本，一键执行下发流表。

curl -X POST -d '{
    "dpid": 1,
    "priority":1,
    "match":{
        "in_port":1
    },
    "actions":[
        {
            "type": "PUSH_VLAN",
            "ethertype": 33024
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",
            "value": 4096
        },
        {
            "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",
            "ethertype": 33024
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid", 
            "value": 4097 
        },
        {
            "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",
            "ethertype": 33024 
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid", 
            "value": 4098 
        },
        {
            "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",
        },
        {
            "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",
        },
        {
            "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",
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
}' http://localhost:8080/stats/flowentry/add
#s2
curl -X POST -d '{
    "dpid": 2,
    "priority":1,
    "match":{
        "in_port":1
    },
    "actions":[
        {
            "type": "PUSH_VLAN",
            "ethertype": 33024 
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid", 
            "value": 4096   
        },
        {
            "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",
            "ethertype": 33024
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",
            "value": 4097
        },
        {
            "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", 
            "ethertype": 33024
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",
            "value": 4098
        },
        {
            "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",
        },
        {
            "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",
        },
        {
            "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",
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
}' http://localhost:8080/stats/flowentry/add

运行

检测连通性

3.对比两种方法，写出你的实验体会

因为忘记了第二次实验内容，所以强制回（chong）忆（xue）了好久。
ryu感觉更方便、更容易理解也更容易使用一点。
Open vSwitch会更难懂，也更复杂一点。