Use mininet create a network topology, the ryu, ovs, host connectivity

Lab topology

Controller: RYU
switch: s1, s2
host: h1, h2, h3, h3
connectivity (direct):
h1 of <-> S1; H2 <-> S1
H3 <-> S2; H4 <-> S2
S1 <- > s2
topology code is as follows:

#!/user/bin/env python
from mininet.topo import Topo
class MyTopo(Topo):
    def build(self):
        left=[]
        left.append(self.addHost("h1"))
        left.append(self.addHost("h2"))
        right=[]
        right.append(self.addHost("h3"))
        right.append(self.addHost("h4"))
        switchs=[]
        switchs.append(self.addSwitch("s1"))
        switchs.append(self.addSwitch("s2"))

        self.addLink(left[0],switchs[0])
        self.addLink(left[1],switchs[0])
        self.addLink(right[0],switchs[1])
        self.addLink(right[1],switchs[1])
        self.addLink(switchs[0],switchs[1])


topos = { ' mytopo ' :( lambda : MyTopo ())}

In mininet/customthe example of a file topo-2sw-2host.py.. Can be modified accordingly in accordance with the contents of the file, define their own topologies.

The custom network topology can be written into this custom directory.

启动 RYU

cd RYUPATH / ryu / app / # First RYU app directory to the next installation directory, there are corresponding module
sudo ryu-manager ofctl_rest.py simple_switch.py
# Start ofctl_rest.py module and simple_switch.py ​​switch, this switch is openflow1.0

Start mininet

sudo mn --controller=remote,ip=192.168.31,port=6653 --custom ~/Desktop/mininet/custom/1.py --topo mytopo

 

 

Topology python file 1.py which is just defined, mytopo last two lines


topos = { 'mytopo' :( lambda: MyTopo ())} in the name of the specified topological