jjo-caso1.py

#!/usr/bin/env python
## Ejemplo minimo para resolver caso1: solo dos sucursales,
## se debe generalizar teniendo por ej suc_count=6 via codigo.
## --jjo, 2025-04-25

from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSController
from mininet.node import CPULimitedHost, Host, Node
from mininet.node import OVSKernelSwitch, UserSwitch
from mininet.node import IVSSwitch
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.link import TCLink, Intf
from subprocess import call

def myNetwork():

    net = Mininet( topo=None,
                   build=False,
                   ipBase='10.0.0.0/8')

    info( '*** Adding controller\n' )
    info( '*** Add switches\n')
    s1wan = net.addSwitch('s1wan', cls=OVSKernelSwitch, failMode='standalone')
    s2wan = net.addSwitch('s2wan', cls=OVSKernelSwitch, failMode='standalone')
    s1lan = net.addSwitch('s1lan', cls=OVSKernelSwitch, failMode='standalone')
    s2lan = net.addSwitch('s2lan', cls=OVSKernelSwitch, failMode='standalone')

    rc = net.addHost('rc', cls=Node, ip='0.0.0.0')
    rc.cmd('sysctl -w net.ipv4.ip_forward=1')
    r1 = net.addHost('r1', cls=Node, ip='0.0.0.0')
    r1.cmd('sysctl -w net.ipv4.ip_forward=1')
    r2 = net.addHost('r2', cls=Node, ip='0.0.0.0')
    r2.cmd('sysctl -w net.ipv4.ip_forward=1')

    info( '*** Add hosts\n')
    h1 = net.addHost('h1', cls=Host, ip='10.0.1.100/24', defaultRoute='via 10.0.1.1')
    h2 = net.addHost('h2', cls=Host, ip='10.0.2.100/24', defaultRoute='via 10.0.2.1')

    info( '*** Add links\n')
    net.addLink(rc, s1wan)
    net.addLink(rc, s2wan)
    net.addLink(r1, s1lan)
    net.addLink(r1, s1wan)
    net.addLink(r2, s2lan)
    net.addLink(r2, s2wan)
    net.addLink(h1, s1lan)
    net.addLink(h2, s2lan)

    info( '*** Starting network\n')
    net.build()
    info( '*** Starting controllers\n')
    for controller in net.controllers:
        controller.start()

    info( '*** Starting switches\n')
    net.get('s1wan').start([])
    net.get('s2wan').start([])
    net.get('s1lan').start([])
    net.get('s2lan').start([])

    info( '*** Post configure switches and hosts\n')
    # Addressing (+auto routing a los respectivos links)
    info( '*** [jjo] Address/ando-arrancando\n')
    r1.cmd('ip a a 10.0.1.1/24       dev r1-eth0')
    r1.cmd('ip a a 192.168.100.1/29  dev r1-eth1')
    r2.cmd('ip a a 10.0.2.1/24       dev r2-eth0')
    r2.cmd('ip a a 192.168.100.9/29  dev r2-eth1')
    rc.cmd('ip a a 192.168.100.6/29  dev rc-eth0')
    rc.cmd('ip a a 192.168.100.14/29 dev rc-eth1')

    # Routing
    info( '*** [jjo] Rute/ando-ando\n')
    r1.cmd('ip r a 10.0.0.0/21 via 192.168.100.6')
    r2.cmd('ip r a 10.0.0.0/21 via 192.168.100.14')
    rc.cmd('ip r a 10.0.1.0/24 via 192.168.100.1')
    rc.cmd('ip r a 10.0.2.0/24 via 192.168.100.9')

    # Testing
    info( '*** [jjo] Teste/ando h1 <-> h2 ping\n')
    output = h1.cmd('ping -W0.5 -qc1 10.0.2.100 && echo ==PASS== || echo ==FAIL==')
    print(output)

    CLI(net)
    net.stop()

if __name__ == '__main__':
    setLogLevel( 'info' )
    myNetwork()