1.实验拓扑
1.1实验拓扑
-
拓扑图
-
python脚本
from mininet.topo import Topo
class MyTopo( Topo ):
"Simple topology example."
def __init__( self ):
# Initialize topology
Topo.__init__( self )
s1 = self.addSwitch('s1')
s2 = self.addSwitch('s2')
h1 = self.addHost('h1')
h2 = self.addHost('h2')
h3 = self.addHost('h3')
h4 = self.addHost('h4')
h5 = self.addHost('h5')
h6 = self.addHost('h6')
self.addLink(h1,s1,1,1)
self.addLink(h2,s1,1,2)
self.addLink(h3,s1,1,3)
self.addLink(s1,s2,4,4)
self.addLink(h4,s2,1,1)
self.addLink(h5,s2,1,2)
self.addLink(h6,s2,1,3)
topos = { 'mytopo': ( lambda: MyTopo() ) }
- 生成拓扑
sudo mn --custom a.py --topo mytopo --controller=remote,ip=127.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13
-
测试
-
连接ryu控制器
2.使用Ryu的REST API下发流表实现和第2次实验同样的VLAN
- 编写脚本s1.sh和s2.sh
#端口号1发来数据
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"in_port":1
},
"actions":[
{
"type": "PUSH_VLAN", # s1将从主机发来的数据包打上vlan_tag
"ethertype": 33024 # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
},
{
"type": "SET_FIELD",
"field": "vlan_vid", # 设置VLAN ID
"value": 4096 # 设置vlan_id的值
},
{
"type": "OUTPUT",
"port": 4
}
]
}' http://127.0.0.1:8080/stats/flowentry/add
#端口号2发来数据
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"in_port":2
},
"actions":[
{
"type": "PUSH_VLAN", # s1将从主机发来的数据包打上vlan_tag
"ethertype": 33024 # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
},
{
"type": "SET_FIELD",
"field": "vlan_vid", # 设置VLAN ID
"value": 4097 # 设置vlan_id的值
},
{
"type": "OUTPUT",
"port": 4
}
]
}' http://127.0.0.1:8080/stats/flowentry/add
#端口号3发来数据
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"in_port":3
},
"actions":[
{
"type": "PUSH_VLAN", # s1将从主机发来的数据包打上vlan_tag
"ethertype": 33024 # 帧类型0x8100(=33024): 表示IEEE 802.1Q的VLAN数据帧
},
{
"type": "SET_FIELD",
"field": "vlan_vid", # 设置VLAN ID
"value": 4098 # 设置vlan_id的值
},
{
"type": "OUTPUT",
"port": 4
}
]
}' http://127.0.0.1:8080/stats/flowentry/add
#向端口1转发
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"dl_vlan": "0"
},
"actions":[
{
"type": "POP_VLAN", # 给进入交换机的包去除 vlan_tag
},
{
"type": "OUTPUT",
"port": 1
}
]
}' http://localhost:8080/stats/flowentry/add
#向端口2转发
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"dl_vlan": "1"
},
"actions":[
{
"type": "POP_VLAN", # 给进入交换机的包去除 vlan_tag
},
{
"type": "OUTPUT",
"port": 2
}
]
}' http://localhost:8080/stats/flowentry/add
#向端口3转发
curl -X POST -d '{
"dpid": 1,
"priority":1,
"match":{
"dl_vlan": "2"
},
"actions":[
{
"type": "POP_VLAN", # 给进入交换机的包去除 vlan_tag
},
{
"type": "OUTPUT",
"port": 3
}
]
}' http://localhost:8080/stats/flowentry/add
备注1:s2将“dpid”改为2。
备注2:sudo: ./xxx.sh:找不到命令,击xxx.sh文件,打开属性—>权限—>勾选允许作为程序执行文件。
-
执行
-
查看流表
sudo ovs-ofctl -O OpenFlow13 dump-flows s1
sudo ovs-ofctl -O OpenFlow13 dump-flows s2
- 查看连通性
3.对比两种方法,写出你的实验体会
两个方法差不多,但ryu查看流表更方便,也稍微容易理解。