resources/mininet/topo.py

   1 #!/usr/bin/python
   2
   3 """Custom L3 topology
   4
   5 4 hosts directly connected to a bridge instance
   6
   7 Refs: https://www.dropbox.com/s/rh6w9nvkuin7tl9/Screenshot%202014-08-14%2017.53.10.png
   8 https://www.dropbox.com/s/h42ufboknd2i0q1/Screenshot%202014-08-14%2017.52.09.png
   9
  10 host1 -- blue broadcast
  11 host2, host4 -- green broadcast
  12 host3 -- external broadcast
  13
  14 Adding the 'topos' dict with a key/value pair to generate our newly defined
  15 topology enables one to pass in '--topo=mytopo' from the command line.
  16 """
  17
  18 from mininet.topo import Topo
  19
  20 class L3TestTopo( Topo ):
  21
  22     """L3 test topology."""
  23
  24     def __init__( self ):
  25         """Create custom topo."""
  26
  27         # Initialize topology
  28         Topo.__init__( self )
  29
  30         # Add hosts and switches
  31         h1 = self.addHost('h1',
  32                           ip="10.10.10.2/24",
  33                           mac="00:00:00:00:00:01",
  34                           defaultRoute="dev h1-eth0 via 10.10.10.1")
  35
  36         h2 = self.addHost('h2',
  37                           ip="10.10.20.2/24",
  38                           mac="00:00:00:00:00:02",
  39                           defaultRoute="dev h2-eth0 via 10.10.20.1")
  40
  41         h3 = self.addHost('h3',
  42                           ip="172.16.1.2/24",
  43                           mac="00:00:00:00:00:03",
  44                           defaultRoute="dev h3-eth0 via 172.16.1.254")
  45
  46         h4 = self.addHost('h4',
  47                           ip="10.10.20.4/24",
  48                           mac="00:00:00:00:00:04",
  49                           defaultRoute="dev h4-eth0 via 10.10.20.1")
  50
  51         s1 = self.addSwitch('s1')
  52
  53         # Add links
  54         self.addLink( s1, h1 )
  55         self.addLink( s1, h2 )
  56         self.addLink( s1, h3 )
  57         self.addLink( s1, h4 )
  58
  59 topos = {'l3': ( lambda: L3TestTopo() )}
  60