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adding documentation and test for linuxrouter.py

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This commit is contained in:
Brian O'Connor
2014-08-27 22:01:18 -07:00
parent 8a987b9c55
commit aa4dfda44c
3 changed files with 83 additions and 13 deletions
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examples/linuxrouter.py
+26 -13
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@@ -3,6 +3,18 @@
"""
linuxrouter.py: Example network with Linux IP router
This example converts a Node into a router using IP forwarding
already built into Linux.
The topology contains a router with three IP subnets:
- 192.168.1.0/24 (interface IP: 192.168.1.1)
- 172.16.0.0/12 (interface IP: 172.16.0.1)
- 10.0.0.0/8 (interface IP: 10.0.0.1)
It also contains three hosts, one in each subnet:
- h1 (IP: 192.168.1.100)
- h2 (IP: 172.16.0.100)
- h3 (IP: 10.0.0.100)
"""
@@ -14,6 +26,7 @@ from mininet.cli import CLI
from mininet.util import irange
class Router( Node ):
"A Node with IP forwarding enabled."
def config( self, **params ):
super( Router, self).config( **params )
@@ -25,25 +38,25 @@ class Router( Node ):
super( Router, self ).terminate()
class NetworkTopo(Topo):
def __init__(self, n=2, h=1, **opts):
Topo.__init__(self, **opts)
class NetworkTopo( Topo ):
"A simple topology of a router with three subnets (one host in each)."
router = self.addNode('r0', cls=Router, ip='192.168.1.1/24')
h1 = self.addHost('h1', ip='192.168.1.100/8', defaultRoute='via 192.168.1.1')
h2 = self.addHost('h2', ip='172.16.0.100/8', defaultRoute='via 172.16.0.1')
h3 = self.addHost('h3', ip='10.0.0.100/24', defaultRoute='via 10.0.0.1')
self.addLink(h1, router, intfName2='r0-eth1', params2={ 'ip' : '192.168.1.1/24' })
self.addLink(h2, router, intfName2='r0-eth2', params2={ 'ip' : '172.16.0.1/24' })
self.addLink(h3, router, intfName2='r0-eth3', params2={ 'ip' : '10.0.0.1/24' })
def build( self, n=2, h=1, **opts ):
router = self.addNode( 'r0', cls=Router, ip='192.168.1.1/24' )
h1 = self.addHost( 'h1', ip='192.168.1.100/24', defaultRoute='via 192.168.1.1' )
h2 = self.addHost( 'h2', ip='172.16.0.100/12', defaultRoute='via 172.16.0.1' )
h3 = self.addHost( 'h3', ip='10.0.0.100/8', defaultRoute='via 10.0.0.1' )
self.addLink( h1, router, intfName2='r0-eth1', params2={ 'ip' : '192.168.1.1/24' } )
self.addLink( h2, router, intfName2='r0-eth2', params2={ 'ip' : '172.16.0.1/12' } )
self.addLink( h3, router, intfName2='r0-eth3', params2={ 'ip' : '10.0.0.1/8' } )
def run():
topo = NetworkTopo()
net = Mininet(topo=topo)
net = Mininet( topo=topo, controller=None ) # no controller needed
net.start()
CLI(net)
CLI( net )
net.stop()
if __name__ == '__main__':
setLogLevel('info')
setLogLevel( 'info' )
run()