| admin | f44b54c | 2014-06-05 09:53:59 -0700 | [diff] [blame] | 1 | """Custom topology example |
| 2 | |
| 3 | Two directly connected switches plus a host for each switch: |
| 4 | |
| 5 | host --- switch --- switch --- host |
| 6 | |
| 7 | Adding the 'topos' dict with a key/value pair to generate our newly defined |
| 8 | topology enables one to pass in '--topo=mytopo' from the command line. |
| 9 | """ |
| 10 | |
| 11 | from mininet.topo import Topo |
| 12 | |
| 13 | class MyTopo( Topo ): |
| 14 | "Simple topology example." |
| 15 | |
| 16 | def __init__( self ): |
| 17 | "Create custom topo." |
| 18 | # Initialize topology |
| 19 | Topo.__init__( self ) |
| 20 | |
| 21 | # Make the middle triangle |
| 22 | leftSwitch = self.addSwitch( 's1' ) |
| 23 | rightSwitch = self.addSwitch( 's2' ) |
| 24 | topSwitch = self.addSwitch( 's3' ) |
| 25 | lefthost = self.addHost( 'h1' ) |
| 26 | righthost = self.addHost( 'h2' ) |
| 27 | tophost = self.addHost( 'h3' ) |
| 28 | self.addLink( leftSwitch, lefthost ) |
| 29 | self.addLink( rightSwitch, righthost ) |
| 30 | self.addLink( topSwitch, tophost ) |
| 31 | |
| 32 | self.addLink( leftSwitch, rightSwitch ) |
| 33 | self.addLink( leftSwitch, topSwitch ) |
| 34 | self.addLink( topSwitch, rightSwitch ) |
| 35 | |
| 36 | # Make aggregation switches |
| 37 | agg1Switch = self.addSwitch( 's4' ) |
| 38 | agg2Switch = self.addSwitch( 's5' ) |
| 39 | agg1Host = self.addHost( 'h4' ) |
| 40 | agg2Host = self.addHost( 'h5' ) |
| 41 | |
| 42 | self.addLink( agg1Switch, agg1Host ) |
| 43 | self.addLink( agg2Switch, agg2Host ) |
| 44 | |
| 45 | self.addLink( agg1Switch, rightSwitch ) |
| 46 | self.addLink( agg2Switch, leftSwitch ) |
| 47 | |
| 48 | # Make two aggregation fans |
| 49 | for i in range(10): |
| 50 | switch = self.addSwitch( 's%d' % (i+6) ) |
| 51 | host = self.addHost( 'h%d' % (i+6) ) |
| 52 | self.addLink( switch, host ) |
| 53 | self.addLink( switch, agg1Switch ) |
| 54 | |
| 55 | for i in range(10): |
| 56 | switch = self.addSwitch( 's%d' % (i+31) ) |
| 57 | host = self.addHost( 'h%d' % (i+31) ) |
| 58 | self.addLink( switch, host ) |
| 59 | self.addLink( switch, agg2Switch ) |
| 60 | |
| 61 | topos = { 'mytopo': ( lambda: MyTopo() ) } |