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diff --git a/examples/limit.py b/examples/limit.py
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+#!/usr/bin/python
+
+"""
+limit.py: example of using link and CPU limits
+"""
+
+from mininet.net import Mininet
+from mininet.link import TCIntf
+from mininet.node import CPULimitedHost
+from mininet.topolib import TreeTopo
+from mininet.util import custom
+from mininet.log import setLogLevel
+
+
+def testLinkLimit( net, bw ):
+ "Run bandwidth limit test"
+ print '*** Testing network %.2f Mbps bandwidth limit' % bw
+ net.iperf( )
+
+
+def limit( bw=10, cpu=.1 ):
+ """Example/test of link and CPU bandwidth limits
+ bw: interface bandwidth limit in Mbps
+ cpu: cpu limit as fraction of overall CPU time"""
+ intf = custom( TCIntf, bw=bw )
+ myTopo = TreeTopo( depth=1, fanout=2 )
+ for sched in 'rt', 'cfs':
+ print '*** Testing with', sched, 'bandwidth limiting'
+ host = custom( CPULimitedHost, sched=sched, cpu=cpu )
+ net = Mininet( topo=myTopo, intf=intf, host=host )
+ net.start()
+ testLinkLimit( net, bw=bw )
+ net.runCpuLimitTest( cpu=cpu )
+ net.stop()
+
+def verySimpleLimit( bw=150 ):
+ "Absurdly simple limiting test"
+ intf = custom( TCIntf, bw=bw )
+ net = Mininet( intf=intf )
+ h1, h2 = net.addHost( 'h1' ), net.addHost( 'h2' )
+ net.addLink( h1, h2 )
+ net.start()
+ net.pingAll()
+ net.iperf()
+ h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
+ h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
+ h1.cmdPrint( 'tc -s qdisc ls dev', h1.defaultIntf() )
+ h2.cmdPrint( 'tc -d class show dev', h2.defaultIntf() )
+ net.stop()
+
+if __name__ == '__main__':
+ setLogLevel( 'info' )
+ limit()