mininet / mininet / topolib.py @ 824afb84
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| 1 | 11a6d400 | Bob Lantz | "Library of potentially useful topologies for Mininet"
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| 2 | |||
| 3 | 5a8bb489 | Bob Lantz | from mininet.topo import Topo |
| 4 | cd745748 | Bob Lantz | from mininet.net import Mininet |
| 5 | 11a6d400 | Bob Lantz | |
| 6 | class TreeTopo( Topo ): |
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| 7 | "Topology for a tree network with a given depth and fanout."
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| 8 | |||
| 9 | def __init__( self, depth=1, fanout=2 ): |
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| 10 | super( TreeTopo, self ).__init__() |
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| 11 | 5a8bb489 | Bob Lantz | # Numbering: h1..N, s1..M
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| 12 | 06b8210e | Bob Lantz | self.hostNum = 1 |
| 13 | 5a8bb489 | Bob Lantz | self.switchNum = 1 |
| 14 | 11a6d400 | Bob Lantz | # Build topology
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| 15 | 06b8210e | Bob Lantz | self.addTree( depth, fanout )
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| 16 | 11a6d400 | Bob Lantz | |
| 17 | 06b8210e | Bob Lantz | def addTree( self, depth, fanout ): |
| 18 | 11a6d400 | Bob Lantz | """Add a subtree starting with node n.
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| 19 | returns: last node added"""
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| 20 | isSwitch = depth > 0
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| 21 | 06b8210e | Bob Lantz | if isSwitch:
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| 22 | ce15c4f6 | Bob Lantz | node = self.addSwitch( 's%s' % self.switchNum ) |
| 23 | 06b8210e | Bob Lantz | self.switchNum += 1 |
| 24 | 5a8bb489 | Bob Lantz | for _ in range( fanout ): |
| 25 | child = self.addTree( depth - 1, fanout ) |
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| 26 | ce15c4f6 | Bob Lantz | self.addLink( node, child )
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| 27 | 06b8210e | Bob Lantz | else:
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| 28 | ce15c4f6 | Bob Lantz | node = self.addHost( 'h%s' % self.hostNum ) |
| 29 | 06b8210e | Bob Lantz | self.hostNum += 1 |
| 30 | 5a8bb489 | Bob Lantz | return node
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| 31 | 11a6d400 | Bob Lantz | |
| 32 | cd745748 | Bob Lantz | |
| 33 | def TreeNet( depth=1, fanout=2, **kwargs ): |
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| 34 | "Convenience function for creating tree networks."
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| 35 | topo = TreeTopo( depth, fanout ) |
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| 36 | return Mininet( topo, **kwargs ) |