延續上篇博客，我們新增一台h4，並開啟Hub功能s0.cmd("brctl setageing br0 0")
#!/usr/bin/env pythonfrom mininet.cli import CLIfrom mininet.net import Mininetfrom mininet.link import Link,TCLinkif ‘__main__‘ == __name__ : net = Mininet(link=TCLink) h1 = net.addHost(‘h1‘, ip="192.168.10.1/24", mac="00:00:00:00:00:01") h2 = net.addHost(‘h2‘, ip="192.168.10.2/24", mac="00:00:00:00:00:02") h3 = net.addHost(‘h3‘, ip="192.168.20.1/24", mac="00:00:00:00:00:03") h4 = net.addHost(‘h4‘, ip="192.168.10.3/24", mac="00:00:00:00:00:04") r0 = net.addHost(‘r0‘) s0 = net.addHost(‘s0‘) net.addLink(h1, s0) net.addLink(h2, s0) net.addLink(s0, r0) net.addLink(r0, h3) net.addLink(s0, h4) net.build() r0.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward") r0.cmd(‘ifconfig r0-eth0 192.168.10.254 netmask 255.255.255.0‘) r0.cmd(‘ifconfig r0-eth1 192.168.20.254 netmask 255.255.255.0‘) h1.cmd("ip route add default via 192.168.10.254 dev h1-eth0") h2.cmd("ip rotue add default via 192.168.10.254 dev h2-eth0") h3.cmd("ip route add default via 192.168.20.254 dev h3-eth0") h4.cmd("ip route add default via 192.168.10.254 dev h4-eth0") s0.cmd("brctl addbr br0") s0.cmd("brctl addif br0 s0-eth0") s0.cmd("brctl addif br0 s0-eth1") s0.cmd("brctl addif br0 s0-eth2") s0.cmd("brctl addif br0 s0-eth3") s0.cmd("brctl setageing br0 0") s0.cmd("ifconfig br0 up") CLI(net) net.stop()Mininet(轻量级软件定义网络和测试平台) 之四
原文地址：http://blog.51cto.com/12098022/2120534