我想用mininet api实现这个拓扑结构,但是两个主机不能跨路由器ping,请问是什么原因?拓扑结构:h1<--->s1<--->r1<--->s2<--->h2我的代码。
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import Node
from mininet.log import setLogLevel, info
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):
defaultIP = '10.0.1.4/24' # IP address for r1-eth1
router = self.addNode('r1', cls=LinuxRouter, ip=defaultIP)
s1, s2 = [self.addSwitch(s) for s in ('s1', 's2')]
self.addLink(s1, router, intfName2='r1-eth1', params2={'ip': defaultIP}) # for clarity
self.addLink(s2, router, intfName2='r1-eth2',
params2={'ip': '10.0.2.4/12'})
h1 = self.addHost('h1', ip='10.0.1.1/24', defaultRoute='via 10.0.1.4')
h2 = self.addHost('h2', ip='10.0.2.1/12', defaultRoute='via 10.0.2.4')
for h, s in [(h1, s1), (h2, s2)]:
self.addLink(h, s)
def run():
topo = NetworkTopo()
net = Mininet(topo=topo) # controller is used by s1-s3
net.start()
info('*** Routing Table on Router:\n')
info(net['r1'].cmd('route'))
CLI(net)
net.stop()
if __name__ == '__main__':
setLogLevel('info')
run()
下面是ping所有的结果:*** Ping:测试ping的可达性 h1 -> X r1 h2 -> X r1 r1 -> h1 h2。
地址10.0.1.124与10.0.2.112重合,设置两个24应该可以。
这对我来说是可行的。
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import Node
from mininet.log import setLogLevel, info
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):
defaultIP = '10.0.1.4/24' # IP address for r1-eth1
router = self.addNode('r1', cls=LinuxRouter, ip=defaultIP)
s1, s2 = [self.addSwitch(s) for s in ('s1', 's2')]
self.addLink(s1, router, intfName2='r1-eth1', params2={'ip': defaultIP}) # for clarity
self.addLink(s2, router, intfName2='r1-eth2',
params2={'ip': '10.0.2.4/24'})
h1 = self.addHost('h1', ip='10.0.1.1/24', defaultRoute='via 10.0.1.4')
h2 = self.addHost('h2', ip='10.0.2.1/24', defaultRoute='via 10.0.2.4')
for h, s in [(h1, s1), (h2, s2)]:
self.addLink(h, s)
def run():
topo = NetworkTopo()
net = Mininet(topo=topo) # controller is used by s1-s3
net.start()
info('*** Routing Table on Router:\n')
info(net['r1'].cmd('route'))
CLI(net)
net.stop()
if __name__ == '__main__':
setLogLevel('info')
run()