Mininet-无法跨2个路由器ping

h1                       h3
   > s1 - r1 - r2 - s2 <
h2                       h4

实际上,两个路由器上有两个子网,但当我尝试在它们之间ping时,什么都没有得到,pingall结果是-

h1 -> h2 X X r1 X 
h2 -> h1 X X r1 X 
h3 -> X X h4 X r2 
h4 -> X X h3 X r2 
r1 -> h1 h2 X X r2 
r2 -> X X h3 h4 r1 

修复了子网,现在路由器可以ping,但仍然无法从每个主机跨它们ping

#!/usr/bin/python

from mininet.topo import Topo
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.log import setLogLevel, info
from mininet.link import TCLink, Intf
from mininet.cli import CLI

class LinuxRouter( Node ):
    "A Node with IP forwarding enabled."

    def config( self, **params ):
        super( LinuxRouter, self).config( **params )
        # Enable forwarding on the router
        self.cmd( 'sysctl net.ipv4.ip_forward=1' )

    def terminate( self ):
        self.cmd( 'sysctl net.ipv4.ip_forward=0' )
        super( LinuxRouter, self ).terminate()

class NetworkTopo( Topo ):

    def build( self, **_opts ):

        r1 = self.addHost('r1', cls=LinuxRouter, ip='10.0.0.1/24')
        r2 = self.addHost('r2', cls=LinuxRouter, ip='10.0.0.2/24')
        self.addLink(r1, r2, intfName1='r1-eth0', intfName2='r2-eth0')

        s1 = self.addSwitch('s1', cls=OVSKernelSwitch, failMode='standalone')
        s2 = self.addSwitch('s2', cls=OVSKernelSwitch, failMode='standalone')
        self.addLink(s1, r1, intfName2='r1-eth1', params2={'ip':'10.0.1.1/24'})
        self.addLink(s2, r2, intfName2='r2-eth1', params2={'ip':'10.0.2.1/24'})

        h1 = self.addHost('h1', ip='10.0.1.2/24', defaultRoute='via 10.0.1.1')
        h2 = self.addHost('h2', ip='10.0.1.3/24', defaultRoute='via 10.0.1.1')
        h3 = self.addHost('h3', ip='10.0.2.2/24', defaultRoute='via 10.0.2.1')
        h4 = self.addHost('h4', ip='10.0.2.3/24', defaultRoute='via 10.0.2.1')

        for h, s in [(h1, s1), (h2, s1), (h3, s2), (h4, s2)]:
        self.addLink (h, s)

def run():
    topo = NetworkTopo()
    net = Mininet(topo = topo)
    net.start()
    info('*** Routing Table on Router:\nR1:\n')
    info(net['r1'].cmd('route'))
    info('\nR2:\n')
    info(net['r2'].cmd('route'))
    CLI(net)
    net.stop()

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