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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。
实验环境
OpenDaylight(Carbon或Berrylium版本)、Postman和Ryu;3
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;
建立拓扑:sudo mn -
-topo=single,3 --mac --controller=remote,ip=127.0.0.1,port=6633 -
-sw
ITch ovsk,
PRotocols=OpenFlow10
连接open daylight:./211906129/opendaylight/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。
nano t1.py
def http_detele(url): url = url headers = {'Content-Type': 'application/json'} resp = requests.delete(url, headers=headers, auth=HTTPBasicAuth('admin', 'admin')) return respif __name__
== '__m
ain__': url = 'http://127.0.0.1:8181/restconf/
config/opendaylight
-inventory:nodes/node/openflow:1/' with open('t1.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。
Python:
nano t1.py
import requestsimport json
From 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 respif __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('t1.json') as f: jstr = f.read() resp = http_get(url) 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。
python:
import requestsimport jsonf
rom 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 respif __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('t1.json') as f: jstr = f.read() resp = http_get(url) print(resp.content)
基本要求
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。
python:
import requestsfrom requests.auth import HTTPBasicAuthdef http_post(url,jstr): url= url headers = {'Content-Type':'application/json'} resp = requests.post(url,jstr,headers=headers) return respif __name__ == "__main__": url='http://127.0.0.1:8080/stats/flowentry/add' with open('r1.json') as f: jstr = f.read() resp = http_post(url,jstr) print (resp.content)
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": []}
(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/addcurl -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/addcurl -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/addcurl -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/addcurl -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/addcurl -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/addcurl -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/addcurl -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
个人总结:这次的实验相对前面几次实验是比较难的、比较麻烦的,尝试了很多次,按照前面完成的同学的思路,一步一步来,其中,编写python和json文件时,要用到的是nano ***.py/json。做完实验还是不知道代码是什么意思,然后opendalight部分的中断h1 ping h3 20s时有点瑕疵,我只中断了10s,所以运行了2次python t1.py代码。然后ryu部分利用mininet平台搭建网络拓扑时,出现 File exists 问题,再来就是Shell脚本,这是完全没看懂,就借鉴了同学的代码。对于我来说,代码这块是个问题,所以以后要努努力,不会敲代码,但是至少也要读懂代码。
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