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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。
#!/usr/bin/pythonimport requestsFrom requests.auth import HTTPBasicAuthdef http_delete(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/' resp = http_delete(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。
python文件:
#!/usr/bin/pythonimport requestsfrom requests.auth import HTTPBasicAuthdef 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('test.json') as f: jstr = f.read() resp = http_put(url,jstr) print (resp.content)
{ "flow": [ { "id": "1", "match": { "in-port": "1", "ethernet-match": { "ethernet-type": { "type": "0x0800" } }, "ipv4-destination": "10.0.0.3/32" }, "instructions": { "instruction": [ { "order": "0", "apply-actions": { "action": [ { "order": "0", "drop-action": {} } ] } } ] }, "flow-name": "flow1", "priority": "65535", "hard-timeout": "20", "cookie": "2", "table_id": "0" } ]}
(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 requestsimport jsonfrom requests.auth import HTTPBasicAuthdef 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('test.json') as f: jstr = f.read() resp = http_get(url) print(resp.content)
3.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。
#!/usr/bin/pythonimport requestsfrom requests.auth import HTTPBasicAuthdef 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('ryutest.json') as f: jstr = f.read() resp = http_post(url,jstr) print (resp.content)
{ "dpid": 1, "match": { "in-port": "1", "dl_dst": "00:00:00:00:00:01" }, "priority": 65535, "hard_timeout": 20, "cookie": "2", "table_id": 0, "actions": []}
(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。|VLAN_ID|Hosts||:--|:--||0|h1 h3||1|h2 h4|
注:输入方式是命令行
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
编程实现基本要求第2部分Ryu(3)中的VLAN划分。
本次实验是基于REST API的SDN北向应用实践,对于流表下发完全没有基础,实验效果也完全不明,全靠张炜龙等一系列先完成的同学,摸着石头过河完成的。实验现象还有许多不明确:
删除流表不配合下发硬超时会报{"errors":{"error":[{"error-type"错误,不清楚删除流表的实验现象;不知道是我的原因还是就是这个流程,我的ryu中的app和ryu视图不能同时启动,导致流程是先启动ryu的switch,然后mininet连接,断开switch.py连接视图,然后启动硬超时python代码,注dl_dst是调整主机的连通性00:00:00:00:00:01是主机1,以此类推。
实验整体迷迷糊糊的,搜索了很多资料,勉勉强强完成。看得出来这部分应该还是基础内容,估摸着接下来的实验和大作业估计够呛。
存一下链接以后估计用的上:https://ryu.readthedocs.io/en/latest/app/ofctl_rest.htML#update-the-switch-stats
https://blog.csdn.net/QQ_34039018/article/details/89136146
https://bLOG.csdn.net/weixin_39793434/article/details/111509659
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