SDN第七次上机作业

（一）基础要求

OpenDaylight

1.利用Mininet平台搭建下图所示网络拓扑，并连接OpenDaylight；

搭建拓扑：sudo mn --topo=single,3 --mac --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow10
连接OpenDaylight(ODL目录下)：./distribution-karaf-0.6.4-Carbon/bin/karaf

2.编写Python程序，调用OpenDaylight的北向接口下发指令删除s1上的流表数据。

def http_detele(url):
    url = url
    headers = {'Content-Type': 'application/json'}
    resp = requests.delete(url, headers=headers, auth=HTTPBasicAuth('admin', 'admin'))
    return resp

if __name__ == '__main__':
    url = 'http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/'
    with open('test.json') as f:
        jstr = f.read()
    resp = http_detele(url)
    print(resp.content)

3.编写Python程序，调用OpenDaylight的北向接口下发硬超时流表，实现拓扑内主机h1和h3网络中断20s。

import requests
from requests.auth import HTTPBasicAuth
def http_put(url,jstr):
    url= url
    headers = {'Content-Type':'application/json'}
    resp = requests.put(url,jstr,headers=headers,auth=HTTPBasicAuth('admin', 'admin'))
    return resp

if __name__ == "__main__":
    url='http://127.0.0.1:8181/restconf/config/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/flow/1'
    with open('206.json') as f:
        jstr = f.read()
    resp = http_put(url,jstr)
    print (resp.content)

4.编写Python程序，调用OpenDaylight的北向接口获取s1上活动的流表数

import requests
import json
from requests.auth import HTTPBasicAuth
def http_get(url):
    url= url
    headers = {'Content-Type':'application/json'}
    resp = requests.get(url,headers=headers,auth=HTTPBasicAuth('admin','admin'))
    return resp

if __name__ == "__main__":
     url = 'http://127.0.0.1:8181/restconf/operational/opendaylight-inventory:nodes/node/openflow:1/flow-node-inventory:table/0/opendaylight-flow-table-statistics:flow-table-statistics'
    with open('206.json') as f:
        jstr = f.read()
    resp = http_get(url)
    print(resp.content)

ryu

1.编写Python程序，调用Ryu的北向接口，实现上述OpenDaylight实验拓扑上相同的硬超时流表下发。

json：

{
  "dpid": 1,
  "match": {
    "in-port": "1",
    "dl_dst": "00:00:00:00:00:03"
  },
  "priority": 65535,
  "hard_timeout": 20,
  "cookie": "2",
  "table_id": 0,
  "actions": []
}

python

import requests
from requests.auth import HTTPBasicAuth
def http_post(url,jstr):
    url= url
    headers = {'Content-Type':'application/json'}
    resp = requests.post(url,jstr,headers=headers)
    return resp

if __name__ == "__main__":
    url='http://127.0.0.1:8080/stats/flowentry/add'
    with open('206-Ryu-1.json') as f:
        jstr = f.read()
    resp = http_post(url,jstr)
    print (resp.content)

2.利用Mininet平台搭建下图所示网络拓扑，要求支持OpenFlow 1.3协议，主机名、交换机名以及端口对应正确。

拓扑生成后需连接Ryu，且Ryu应能够提供REST API服务。
连接Ryu：ryu-manager ryu/ryu/app/gui_topology/gui_topology.py --observe-links

3.整理一个Shell脚本，参考Ryu REST API的文档，利用curl命令，实现和实验2相同的VLAN。



curl -X POST -d '{
  "dpid": 1,
  "match": {
    "in_port": 1
  },
  "actions": [
    {
      "type": "PUSH_VLAN",
      "ethertype": 33024
    },
    {
      "type": "SET_FIELD",
      "field": "vlan_vid",
      "value": 4096
    },
    {
      "type":"OUTPUT",
      "port": 3
    }
    ],
    "priority":5
}' http://localhost:8080/stats/flowentry/add

curl -X POST -d '
{
  "dpid": 1,
  "priority":5,
  "match": {
    "in_port": 2
  },
  "actions": [
    {
      "type": "PUSH_VLAN",
      "ethertype": 33024
    },
    {
      "type": "SET_FIELD",
      "field": "vlan_vid",
      "value": 4097
    },
    {
      "type":"OUTPUT",
      "port": 3
    }
    ]
}' http://localhost:8080/stats/flowentry/add

curl -X POST -d '
{
  "dpid": 1,
  "match": {
    "vlan_vid": 0
  },
  "actions": [
    {
      "type": "POP_VLAN",
      "ethertype": 33024
    },
    {
      "type":"OUTPUT",
      "port": 1
    }
    ],
    "priority":5
}
' http://localhost:8080/stats/flowentry/add

curl -X POST -d'
{
  "dpid": 1,
  "match": {
    "vlan_vid": 1
  },
  "actions": [
    {
      "type": "POP_VLAN",
      "ethertype": 33024
    },
    {
      "type":"OUTPUT",
      "port": 2
    }
    ],
    "priority":5
}
' http://localhost:8080/stats/flowentry/add
curl -X POST -d '{
  "dpid": 2,
  "match": {
    "in_port": 1
  },
  "actions": [
    {
      "type": "PUSH_VLAN",
      "ethertype": 33024
    },
    {
      "type": "SET_FIELD",
      "field": "vlan_vid",
      "value": 4096
    },
    {
      "type":"OUTPUT",
      "port": 3
    }
    ],
    "priority":5
}' http://localhost:8080/stats/flowentry/add

curl -X POST -d '
{
  "dpid": 2,
  "match": {
    "in_port": 2
  },
  "actions": [
    {
      "type": "PUSH_VLAN",
      "ethertype": 33024
    },
    {
      "type": "SET_FIELD",
      "field": "vlan_vid",
      "value": 4097
    },
    {
      "type":"OUTPUT",
      "port": 3
    }
    ],
    "priority":5
}' http://localhost:8080/stats/flowentry/add

curl -X POST -d '
{
  "dpid": 2,
  "match": {
    "vlan_vid": 0
  },
  "actions": [
    {
      "type": "POP_VLAN",
      "ethertype": 33024
    },
    {
      "type":"OUTPUT",
      "port": 1
    }
    ],
    "priority":5
}
' http://localhost:8080/stats/flowentry/add

curl -X POST -d'
{
  "dpid": 2,
  "match": {
    "vlan_vid": 1
  },
  "actions": [
    {
      "type": "POP_VLAN",
      "ethertype": 33024
    },
    {
      "type":"OUTPUT",
      "port": 2
    }
    ],
    "priority":5
}' http://localhost:8080/stats/flowentry/add

（二）进阶要求

编程实现基本要求第2部分Ryu（3）中的VLAN划分

#!/usr/bin/python
import requests
from requests.auth import HTTPBasicAuth

def http_post(url, js):
    url = url
    headers = {'Content-Type': 'application/json'}
    resp = requests.post(url, jstr, headers=headers)
    return resp

if __name__ == '__main__':
    url = 'http://localhost:8080/stats/flowentry/add'
    for i in range(1, 9):
        with open('%s.json' % i) as f:
            jstr = f.read()
    resp = http_post(url, jstr)
    print(resp.content)

（三）实验总结

本次实验要感谢荆宇飞，颜佳灿两位同学的指导
作业参考：
https://www.cnblogs.com/jingyufei/p/15425653.html
https://www.cnblogs.com/Moonlightcode/p/15416597.html
json文件参考：
https://blog.csdn.net/weixin_39793434/article/details/111509659
ODL缺少组件参考：
“odl安装的一些坑”：
https://blog.csdn.net/zengxiaosen/article/details/72864594
“OpenDaylight安装feature时出现Error executing command: Can't install feature问题”：
https://blog.csdn.net/u011412226/article/details/80243612
ODL部分：
看了同学的做法之后知道了怎么修改python代码，然后发现没有json文件
同学给了一个连接，参照连接完成了json文件的编写（其实不难）
ODL1-3差不多，代码改改就好了
Ryu部分：
在完成了ODL的实验之后，有其他作业参照的情况下 Ryu部分不是很难（非常感谢最初几位完成作业的同学，他们通过不断地试错修改才得到正确的答案）
miniedit连接ryu时要设置这个

Ryu的第三个小节我研究了很长时间，学到很多
进阶？没有进阶，我懒doge
再次推荐https://www.cnblogs.com/Moonlightcode/p/15416597.html

posted on 2021-10-22 17:15 yyyyddss 阅读(169) 评论(0) 编辑收藏举报