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vlan_04.py
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#!/usr/bin/env python
from mininet.net import Mininet
from mininet.cli import CLI
from mininet.link import Link,TCLink,Intf
if '__main__' == __name__:
net = Mininet(link=TCLink)
h1 = net.addHost('h1')
h2 = net.addHost('h2')
h3 = net.addHost('h3')
h4 = net.addHost('h4')
#h5,h6,h7 is a switch
h5 = net.addHost('h5')
h6 = net.addHost('h6')
h7 = net.addHost('h7')
#h8 is a router
h8 = net.addHost('h8')
Link(h1, h5)
Link(h2, h5)
Link(h3, h6)
Link(h4, h6)
Link(h5, h7)
Link(h6, h7)
Link(h7, h8)
net.build()
h1.cmd("ifconfig h1-eth0 0")
h2.cmd("ifconfig h2-eth0 0")
h3.cmd("ifconfig h3-eth0 0")
h4.cmd("ifconfig h4-eth0 0")
h5.cmd("ifconfig h5-eth0 0")
h5.cmd("ifconfig h5-eth1 0")
h5.cmd("ifconfig h5-eth2 0")
h6.cmd("ifconfig h6-eth0 0")
h6.cmd("ifconfig h6-eth1 0")
h6.cmd("ifconfig h6-eth2 0")
h7.cmd("ifconfig h7-eth0 0")
h7.cmd("ifconfig h7-eth1 0")
h8.cmd("ifconfig h8-eth0 0")
h5.cmd("vconfig add h5-eth2 10")
h5.cmd("vconfig add h5-eth2 20")
h6.cmd("vconfig add h6-eth2 10")
h6.cmd("vconfig add h6-eth2 20")
h7.cmd("vconfig add h7-eth0 10")
h7.cmd("vconfig add h7-eth0 20")
h7.cmd("vconfig add h7-eth1 10")
h7.cmd("vconfig add h7-eth1 20")
h7.cmd("vconfig add h7-eth2 10")
h7.cmd("vconfig add h7-eth2 20")
h8.cmd("vconfig add h8-eth0 10")
h8.cmd("vconfig add h8-eth0 20")
h5.cmd("ifconfig h5-eth2.10 up")
h5.cmd("ifconfig h5-eth2.20 up")
h6.cmd("ifconfig h6-eth2.10 up")
h6.cmd("ifconfig h6-eth2.20 up")
h7.cmd("ifconfig h7-eth0.10 up")
h7.cmd("ifconfig h7-eth0.20 up")
h7.cmd("ifconfig h7-eth1.10 up")
h7.cmd("ifconfig h7-eth1.20 up")
h7.cmd("ifconfig h7-eth2.10 up")
h7.cmd("ifconfig h7-eth2.20 up")
h5.cmd("brctl addbr brvlan10")
h5.cmd("brctl addbr brvlan20")
h5.cmd("brctl addif brvlan10 h5-eth0")
h5.cmd("brctl addif brvlan10 h5-eth2.10")
h5.cmd("brctl addif brvlan20 h5-eth1")
h5.cmd("brctl addif brvlan20 h5-eth2.20")
h5.cmd("ifconfig brvlan10 up")
h5.cmd("ifconfig brvlan20 up")
h6.cmd("brctl addbr brvlan10")
h6.cmd("brctl addbr brvlan20")
h6.cmd("brctl addif brvlan10 h6-eth0")
h6.cmd("brctl addif brvlan10 h6-eth2.10")
h6.cmd("brctl addif brvlan20 h6-eth1")
h6.cmd("brctl addif brvlan20 h6-eth2.20")
h6.cmd("ifconfig brvlan10 up")
h6.cmd("ifconfig brvlan20 up")
h7.cmd("brctl addbr brvlan10")
h7.cmd("brctl addbr brvlan20")
h7.cmd("brctl addif brvlan10 h7-eth0.10")
h7.cmd("brctl addif brvlan10 h7-eth1.10")
h7.cmd("brctl addif brvlan10 h7-eth2.10")
h7.cmd("brctl addif brvlan20 h7-eth0.20")
h7.cmd("brctl addif brvlan20 h7-eth1.20")
h7.cmd("brctl addif brvlan20 h7-eth2.20")
h7.cmd("ifconfig brvlan10 up")
h7.cmd("ifconfig brvlan20 up")
h8.cmd("echo 1 > /proc/sys/net/ipv4/ip_forward")
h8.cmd("ifconfig h8-eth0.10 10.0.10.1 netmask 255.255.255.0")
h8.cmd("ifconfig h8-eth0.20 10.0.20.1 netmask 255.255.255.0")
h1.cmd("ifconfig h1-eth0 10.0.10.2 netmask 255.255.255.0")
h2.cmd("ifconfig h2-eth0 10.0.20.2 netmask 255.255.255.0")
h3.cmd("ifconfig h3-eth0 10.0.10.3 netmask 255.255.255.0")
h4.cmd("ifconfig h4-eth0 10.0.20.3 netmask 255.255.255.0")
h1.cmd("ip route add default via 10.0.10.1 dev h1-eth0")
h2.cmd("ip route add default via 10.0.20.1 dev h2-eth0")
h3.cmd("ip route add default via 10.0.10.1 dev h3-eth0")
h4.cmd("ip route add default via 10.0.20.1 dev h4-eth0")
CLI(net)
net.stop()