topo_for_vlan_dot1q_test.py

"""Custom topology example

Two directly connected switches plus a host for each switch:

   host --- switch --- switch --- host

Adding the 'topos' dict with a key/value pair to generate our newly defined
topology enables one to pass in '--topo=mytopo' from the command line.
"""

from mininet.topo import Topo

class MyTopo( Topo ):
    "Simple topology example."

    def __init__( self ):
        "Create custom topo."

        # Initialize topology
        Topo.__init__( self )

        # Add hosts and switches
        h1 = self.addHost( 'h1' )
        h2 = self.addHost( 'h2' )
        h3 = self.addHost( 'h3' )
        h4 = self.addHost( 'h4' )
        h5 = self.addHost( 'h5' )
        s1 = self.addSwitch( 's1', dpid="1" )
        s2 = self.addSwitch( 's2', dpid="2" )

        # Add links
        self.addLink( h1, s1 )
        self.addLink( h2, s1 )
        self.addLink( h3, s1 )
        self.addLink( s1, s2 )
        self.addLink( s2, h4 )
        self.addLink( s2, h5 )

topos = { 'mytopo': ( lambda: MyTopo() ) }