Brad Walker
74 lines
2.4 KiB
Python
Executable File
74 lines
2.4 KiB
Python
Executable File
#!/usr/bin/python
|
|
|
|
"""
|
|
Build a simple network from scratch, using mininet primitives.
|
|
This is more complicated than using the higher-level classes,
|
|
but it exposes the configuration details and allows customization.
|
|
|
|
For most tasks, the higher-level API will be preferable.
|
|
|
|
This version uses the user datapath and an explicit control network.
|
|
"""
|
|
|
|
from mininet.net import Mininet
|
|
from mininet.node import Node
|
|
from mininet.link import Link
|
|
from mininet.log import setLogLevel, info
|
|
|
|
def linkIntfs( node1, node2 ):
|
|
"Create link from node1 to node2 and return intfs"
|
|
link = Link( node1, node2 )
|
|
return link.intf1, link.intf2
|
|
|
|
def scratchNetUser( cname='controller', cargs='ptcp:' ):
|
|
"Create network from scratch using user switch."
|
|
|
|
# It's not strictly necessary for the controller and switches
|
|
# to be in separate namespaces. For performance, they probably
|
|
# should be in the root namespace. However, it's interesting to
|
|
# see how they could work even if they are in separate namespaces.
|
|
|
|
info( '*** Creating Network\n' )
|
|
controller = Node( 'c0' )
|
|
switch = Node( 's0')
|
|
h0 = Node( 'h0' )
|
|
h1 = Node( 'h1' )
|
|
cintf, sintf = linkIntfs( controller, switch )
|
|
h0intf, sintf1 = linkIntfs( h0, switch )
|
|
h1intf, sintf2 = linkIntfs( h1, switch )
|
|
|
|
info( '*** Configuring control network\n' )
|
|
controller.setIP( '10.0.123.1/24', intf=cintf )
|
|
switch.setIP( '10.0.123.2/24', intf=sintf)
|
|
|
|
info( '*** Configuring hosts\n' )
|
|
h0.setIP( '192.168.123.1/24', intf=h0intf )
|
|
h1.setIP( '192.168.123.2/24', intf=h1intf )
|
|
|
|
info( '*** Network state:\n' )
|
|
for node in controller, switch, h0, h1:
|
|
info( str( node ) + '\n' )
|
|
|
|
info( '*** Starting controller and user datapath\n' )
|
|
controller.cmd( cname + ' ' + cargs + '&' )
|
|
switch.cmd( 'ifconfig lo 127.0.0.1' )
|
|
intfs = str( sintf1 ), str( sintf2 )
|
|
switch.cmd( 'ofdatapath -i ' + ','.join( intfs ) + ' ptcp: &' )
|
|
switch.cmd( 'ofprotocol tcp:' + controller.IP() + ' tcp:localhost &' )
|
|
|
|
info( '*** Running test\n' )
|
|
h0.cmdPrint( 'ping -c1 ' + h1.IP() )
|
|
|
|
info( '*** Stopping network\n' )
|
|
controller.cmd( 'kill %' + cname )
|
|
switch.cmd( 'kill %ofdatapath' )
|
|
switch.cmd( 'kill %ofprotocol' )
|
|
switch.deleteIntfs()
|
|
info( '\n' )
|
|
|
|
if __name__ == '__main__':
|
|
setLogLevel( 'info' )
|
|
info( '*** Scratch network demo (user datapath)\n' )
|
|
Mininet.init()
|
|
scratchNetUser()
|