当前位置 博文首页 > 无限迭代中......：《虚拟化和云计算》实验报告——MININET实践S
由一些虚拟的终端节点(end-hosts)、交换机、路由器连接而成的一个网络仿真器，支持0penflow协议，可以用它来实践SDN。
git clone git://github.com/mininet/mininet
cd mininet/util
./install.sh -a
apt install mininet
sudo mn # 会显示mn的默认网络拓扑
pingall # 使用pingall测试，会显示主机h1和h2可以ping通
nodes #其他命令测试
net
sudo mn --topo singe,3
pingall
nodes
net
sudo mn --topo linear,3
pingall
nodes
net
sudo mn --topo tree,2
pingall
nodes
net
cd mininet/custom
ll
mn --custom topo-2sw-2host.py --topo mytopo
pingall
nodes
net
vim topo-2sw-2host.py
mn --custom topo-2sw-2host.py --topo mytopo
pingall
nodes
net
from mininet.topo import Topo
class MyTopo( Topo ):
"Simple topology example."
def build( self ):
"Create custom topo."
# Add hosts and switches
leftHost = self.addHost( 'h1' )
midHost = self.addHost( 'h3' )
rightHost = self.addHost( 'h2' )
leftSwitch = self.addSwitch( 's1' )
midSwitch = self.addSwitch( 's3' )
rightSwitch = self.addSwitch( 's2' )
# Add links
self.addLink( leftHost, leftSwitch )
self.addLink( leftSwitch, midSwitch)
self.addLink( midHost, midSwitch )
self.addLink( midSwitch, rightSwitch )
self.addLink( rightSwitch, rightHost )
topos = { 'mytopo': ( lambda: MyTopo() ) }
RYU是一款基于python的控制器，你可用Ryu实现各种想要实现的网络功能，它可以下发或接收流表进行各种路由运算。
apt-get update
apt install python3-pip
pip3 install ryu
ryu-manager
Terminal 1
ryu-manager
Terminal 2
mn --controller=remote,ip=127.0.0.1,port=6653
pingall
h1 ping h2
无法ping通
Terminal 1
ryu-manager ryu.app.simple_switch
Terminal 2
mn --controller=remote,ip=127.0.0.1,port=6653
pingall
h1 ping h2
官方文档：https://ryu.readthedocs.io/en/latest/app/ofctl_rest.html
ryu-manager ryu.app.ofctl_rest
Terminal 2
mn --controller=remote,ip=127.0.0.1,port=6653
pingall
h1 ping h2
无法ping通
GET 192.168.30.134:8080/stats/desc/1
获取dpid为1的交换机流表
GET 192.168.30.134:8080/stats/flow/1
POST 192.168.30.134:8080/stats/flowentry/add
{
"dpid": 1,
"match": {
"in_port": 1
},
"actions": [
{
"type": "OUTPUT",
"port": 2
}
]
}
{
"dpid": 1,
"match": {
"in_port": 2
},
"actions": [
{
"type": "OUTPUT",
"port": 1
}
]
}
ping通
POST 192.168.30.134:8080/stats/flowentry/clear/1
无法ping通
