| carlosmscabral | f40ecd1 | 2013-02-01 18:15:58 -0200 | [diff] [blame^] | 1 | "Library of potentially useful topologies for Mininet" |
| 2 | |
| 3 | from mininet.topo import Topo |
| 4 | from mininet.net import Mininet |
| 5 | |
| 6 | class TreeTopo( Topo ): |
| 7 | "Topology for a tree network with a given depth and fanout." |
| 8 | |
| 9 | def __init__( self, depth=1, fanout=2 ): |
| 10 | super( TreeTopo, self ).__init__() |
| 11 | # Numbering: h1..N, s1..M |
| 12 | self.hostNum = 1 |
| 13 | self.switchNum = 1 |
| 14 | # Build topology |
| 15 | self.addTree( depth, fanout ) |
| 16 | |
| 17 | def addTree( self, depth, fanout ): |
| 18 | """Add a subtree starting with node n. |
| 19 | returns: last node added""" |
| 20 | isSwitch = depth > 0 |
| 21 | if isSwitch: |
| 22 | node = self.addSwitch( 's%s' % self.switchNum ) |
| 23 | self.switchNum += 1 |
| 24 | for _ in range( fanout ): |
| 25 | child = self.addTree( depth - 1, fanout ) |
| 26 | self.addLink( node, child ) |
| 27 | else: |
| 28 | node = self.addHost( 'h%s' % self.hostNum ) |
| 29 | self.hostNum += 1 |
| 30 | return node |
| 31 | |
| 32 | |
| 33 | def TreeNet( depth=1, fanout=2, **kwargs ): |
| 34 | "Convenience function for creating tree networks." |
| 35 | topo = TreeTopo( depth, fanout ) |
| 36 | return Mininet( topo, **kwargs ) |