第七次SDN作业

实验7：基于REST API的SDN北向应用实践

一、实验目的

  1. 能够编写程序调用OpenDaylight REST API实现特定网络功能；
  2. 能够编写程序调用Ryu REST API实现特定网络功能。

二、实验环境

  1. 下载虚拟机软件Oracle VisualBox或VMware；
  2. 在虚拟机中安装Ubuntu 20.04 Desktop amd64，并完整安装Mininet、OpenDaylight（Carbon版本）、Postman和Ryu；

三、实验要求

（一）基本要求

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

     

     

     

     


    （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。

     

     


    （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。

     

     

     

     

     


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

     

     

  2. 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。

     

     

     

     


    （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。

     

     

     

     


    （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。
  3. # scripts.sh
curl -X POST -d '{
    "dpid": 1,
    "priority": 1,
    "match":{
        "in_port": 1
    },
    "actions":[
        {
            "type": "PUSH_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",     # Set VLAN ID
            "value": 4096            # Describe sum of vlan_id(e.g. 6) | OFPVID_PRESENT(0x1000=4096)
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 1,
    "priority": 1,
    "match":{
        "in_port": 2
    },
    "actions":[
        {
            "type": "PUSH_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",     # Set VLAN ID
            "value": 4097            # Describe sum of vlan_id(e.g. 6) | OFPVID_PRESENT(0x1000=4096)
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 1,
    "priority": 1,
    "match":{
        "vlan_vid": 0
    },
    "actions":[
        {
            "type": "POP_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "OUTPUT",
            "port": 1
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 1,
    "priority": 1,
    "match":{
        "vlan_vid": 1
    },
    "actions":[
        {
            "type": "POP_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "OUTPUT",
            "port": 2
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 2,
    "priority": 1,
    "match":{
        "in_port": 1
    },
    "actions":[
        {
            "type": "PUSH_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",     # Set VLAN ID
            "value": 4096            # Describe sum of vlan_id(e.g. 6) | OFPVID_PRESENT(0x1000=4096)
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 2,
    "priority": 1,
    "match":{
        "in_port": 2
    },
    "actions":[
        {
            "type": "PUSH_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "SET_FIELD",
            "field": "vlan_vid",     # Set VLAN ID
            "value": 4097            # Describe sum of vlan_id(e.g. 6) | OFPVID_PRESENT(0x1000=4096)
        },
        {
            "type": "OUTPUT",
            "port": 3
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 2,
    "priority": 1,
    "match":{
        "vlan_vid": 0
    },
    "actions":[
        {
            "type": "POP_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "OUTPUT",
            "port": 1
        }
    ]
 }' http://localhost:8080/stats/flowentry/add

 curl -X POST -d '{
    "dpid": 2,
    "priority": 1,
    "match":{
        "vlan_vid": 1
    },
    "actions":[
        {
            "type": "POP_VLAN",     # Push a new VLAN tag if a input frame is non-VLAN-tagged
            "ethertype": 33024       # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
        },
        {
            "type": "OUTPUT",
            "port": 2
        }
    ]
 }' http://localhost:8080/stats/flowentry/add
    |VLAN_ID|Hosts|
    |:--|:--|
    |0|h1 h3|
    |1|h2 h4|

  4.  

     

（二）进阶要求

编程实现基本要求第2部分Ryu（3）中的VLAN划分。

importjsonimportrequestsif__name__=="__main__":url='http://127.0.0.1:8080/stats/flowentry/add'flow1= { "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":3 } ] } flow2= { "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":3 } ] } flow3= { "dpid":1, "priority":1, "match":{ "vlan_vid":0 }, "actions":[ { "type":"POP_VLAN", "ethertype":33024 }, { "type":"OUTPUT", "port":1 } ] } flow4= { "dpid":1, "priority":1, "match": { "vlan_vid":1 }, "actions": [ { "type":"POP_VLAN", "ethertype":33024 }, { "type":"OUTPUT", "port":2 } ] } flow5= { "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":3 } ] } flow6= { "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":3 } ] } flow7= { "dpid":2, "priority":1, "match": { "vlan_vid":0 }, "actions": [ { "type":"POP_VLAN", "ethertype":33024 }, { "type":"OUTPUT", "port":1 } ] } flow8= { "dpid":2, "priority":1, "match": { "vlan_vid":1 }, "actions": [ { "type":"POP_VLAN", "ethertype":33024 }, { "type":"OUTPUT", "port":2 } ] } res1=requests.post(url,json=flow1)res2=requests.post(url,json=flow2)res3=requests.post(url,json=flow3)res4=requests.post(url,json=flow4)res5=requests.post(url,json=flow5)res6=requests.post(url,json=flow6)res7=requests.post(url,json=flow7)res8=requests.post(url,json=flow8)

（三）实验报告

    1. 请用Markdown排版；
    2. 将所有本实验相关文件保存在目录/home/用户名/学号/lab7/中；
    3. （一）只需要提交实现相应Python代码和执行结果截图，其余文字请勿赘述；
    4. （二）不做必须要求，有完成的同学请提交Python代码和运行结果，文件保存目录参照要求2。
    5. 个人总结：本次实验难度较大，结合了前几次的实验内容和操作，通过上网查询资料以及询问同学解决了部分问题但还是一知半解，这次实验可以让我熟悉流表的硬超时，实验中出现了代码“-”的遗漏，未打开odl控制台的报错，以及python代码运行出现问题，问了室友才得以解决，还有就是连接ryu的时候要使用ryu-manager ryu.app.simple_switch_13 ryu.app.ofctl_rest  感觉自己的知识储备还不够，还有很多地方要去深入学习。

 

posted @ 2021-10-25 19:01  12315491  阅读(50)  评论(0)    收藏  举报