一、OpenDaylight
1.利用Mininet平台搭建下圖所示網絡拓撲，並連接OpenDaylight；
-
搭建拓撲：sudo mn --topo=single,3 --mac --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow10
-
連接OpenDaylight(ODL目錄下)：./distribution-karaf-0.6.4-Carbon/bin/karaf
2.編寫Python程序，調用OpenDaylight的北向接口下發指令刪除s1上的流表數據。
import requests
from requests.auth import HTTPBasicAuth
def 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/'
with open('114test.json') as f:
jstr = f.read(
resp = http_delete(url)
print (resp.content)
3.編寫Python程序，調用OpenDaylight的北向接口下發硬超時流表，實現拓撲內主機h1和h3網絡中斷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('114test.json') as f:
jstr = f.read()
resp = http_put(url,jstr)
print (resp.content)
4.編寫Python程序，調用OpenDaylight的北向接口獲取s1上活動的流表數。
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('114test.json') as f:
jstr = f.read()
resp = http_get(url)
print(resp.content)
二、Ryu
1.編寫Python程序，調用Ryu的北向接口，實現上述OpenDaylight實驗拓撲上相同的硬超時流表下發
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('114test.json') as f:
jstr = f.read()
resp = http_post(url,jstr)
print (resp.content)
{
"dpid": 1,
"match": {
"in-port": "1",
"dl_dst": "00:00:00:00:00:03"
},
"priority": 65535,
"hard_timeout": 20,
"cookie": "2",
"table_id": 0,
"actions": []
}
2.利用Mininet平台搭建下圖所示網絡拓撲，要求支持OpenFlow 1.3協議，主機名、交換機名以及端口對應正確。拓撲
生成后需連接Ryu，且Ryu應能夠提供REST API服務。
- 連接Ryu：ryu-manager ryu/ryu/app/gui_topology/gui_topology.py --observe-links
3.整理一個Shell腳本，參考Ryu REST API的文檔，利用curl命令，實現和實驗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
進階要求
- 編程實現基本要求第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)
實驗總結
個人總結與想法
實驗難度略高，開始沒理解題目，看了之前自己的博客思考了很久才醒悟。后主要時間耗費在修改python代碼上，各種報錯差點就放棄了。首先是({"errors":{"error":[{"error-type":"protocol","error-tag":"unknown-element","error-message":""flownode-inventory" module does not exist."}]}} 和 IndentationError: expected an indented block)!!!其實只要第一個會了，后面的基本操作上沒太大區別。進階懶了，進行一個拙略的模仿了。
困難與解決方法
1.ImportError: No module named requests，可能不小心刪了文件夾，按安裝指導的解決辦法就沒報錯了
2.代碼縮進和連接符，還是要養成寫代碼格式規范的好習慣
3.有時候會突然連接不上控制器或者已經沒問題還一直報錯，再一次覺得重啟能解決99%的問題，1%建議直接重裝系統
PS:不清楚怎么開始可以看看