2019 SDN上机第6次作业

1.实验拓扑

实验拓扑

要求
使用Python脚本完成拓扑搭建，并连接ryu控制器。
答：

• 搭建拓扑：
  
  

• 连接控制器
  命令：
  
  

---

2.使用Ryu的REST API下发流表实现和第2次实验同样的VLAN

参考资料
REST API：可以在线学习中国大学MOOC 《软件定义网络》第六讲 北向接口
ryu控制器的api文档
ryu的拓扑展示
要求
编写脚本，一键执行下发流表。
答：

• 安装curl
  命令:sudo apt-get install curl
  
  

• 编写脚本如下

  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

• 执行脚本

• pinall 检查连通性
  

  

---

#3.对比两种方法，写出你的实验体会
相比实验二中在终端手动下发流表，本实验中，使用Ryu的REST API的下发方式下发流表实现VLAN，更加直观，且易于理解，更具有灵活性，可读性极佳。

来源：https://www.cnblogs.com/gulyar/p/12000065.html