Mininet 创建topo的时候指定host的ip

示例，要创建一个3个交换机8个主机的拓扑，如下图：

可以用如下python代码创建上述拓扑，并指定ip：

from mininet.topo import Topo

class MyTopo( Topo ):
    def __init__( self ):
        "Create custom topo."

        # Initialize topology
        Topo.__init__( self )
        
        # Add hosts and switches
        leftHost1 = self.addHost( 'h1', ip='10.0.0.1' )
        leftHost2 = self.addHost( 'h2', ip='10.0.0.2' )
        leftHost3 = self.addHost( 'h3', ip='10.0.1.1' )
        leftHost4 = self.addHost( 'h4', ip='10.0.1.2' )
                
        leftSwitch = self.addSwitch( 's1' )
        middleSwitch = self.addSwitch( 's2' )
        rightSwitch = self.addSwitch( 's3' )
        
        rightHost1 = self.addHost( 'h5', ip='10.0.11.1' )
        rightHost2 = self.addHost( 'h6', ip='10.0.11.2' )
        rightHost3 = self.addHost( 'h7', ip='10.0.12.1' )
        rightHost4 = self.addHost( 'h8', ip='10.0.12.2' )

        # Add links
        self.addLink( leftHost1, leftSwitch )
        self.addLink( leftHost2, leftSwitch )
        self.addLink( leftHost3, leftSwitch )
        self.addLink( leftHost4, leftSwitch )
        self.addLink( leftSwitch, middleSwitch )
        self.addLink( middleSwitch, rightSwitch )
        self.addLink( rightSwitch, rightHost1 )
        self.addLink( rightSwitch, rightHost2 )
        self.addLink( rightSwitch, rightHost3 )
        self.addLink( rightSwitch, rightHost4 )
        
topos = { 'mytopo': ( lambda: MyTopo() ) }

创建topo之后用dump命令验证，可见它们的ip确实如代码中指定的一样。

mininet@mininet-vm:~/mininet/custom$ sudo mn --custom topo-3sw-8host.py --topo mytopo --controller=remote,ip=192.168.56.1 --mac
added a switch!    
added a switch!    
added a switch!    
*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2 h3 h4 h5 h6 h7 h8 
*** Adding switches:
s1 s2 s3 
*** Adding links:
(h1, s1) (h2, s1) (h3, s1) (h4, s1) (h5, s3) (h6, s3) (h7, s3) (h8, s3) (s1, s2) (s2, s3) 
*** Configuring hosts
h1 h2 h3 h4 h5 h6 h7 h8 
*** Starting controller
*** Starting 3 switches
s1 s2 s3 
*** Starting CLI:
mininet> dump
<RemoteController c0: 192.168.56.1:6633 pid=6887> 
<OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None,s1-eth4:None,s1-eth5:None pid=6904> 
<OVSSwitch s2: lo:127.0.0.1,s2-eth1:None,s2-eth2:None pid=6909> 
<OVSSwitch s3: lo:127.0.0.1,s3-eth1:None,s3-eth2:None,s3-eth3:None,s3-eth4:None,s3-eth5:None pid=6914> 
<Host h1: h1-eth0:10.0.0.1 pid=6894> 
<Host h2: h2-eth0:10.0.0.2 pid=6895> 
<Host h3: h3-eth0:10.0.1.1 pid=6896> 
<Host h4: h4-eth0:10.0.1.2 pid=6897> 
<Host h5: h5-eth0:10.0.11.1 pid=6898> 
<Host h6: h6-eth0:10.0.11.2 pid=6899> 
<Host h7: h7-eth0:10.0.12.1 pid=6900> 
<Host h8: h8-eth0:10.0.12.2 pid=6901> 
mininet>