之前我使用以下命令创建了 mininet 拓扑:
sudo mn --topo 树,深度=2,扇出=5 --controller=remote,ip=10.0.0.1,端口=6633 --switch ovsk,协议(protocol)=OpenFlow13,--link tc,bw =1,延迟=10ms
我需要为不同的链接指定自定义bw
值。
如何以通用方式制作一棵树,指定深度
和扇出
值,如TreeNet
提到的here ?我需要一个 setLink(int value, src, dest)
来修改创建的树的链接。
到目前为止我有这个:
#!/usr/bin/python
from functools import partial
from mininet.cli import CLI
from mininet.link import TCLink
from mininet.log import setLogLevel
from mininet.net import Mininet
from mininet.node import OVSKernelSwitch
from mininet.node import RemoteController
from mininet.topo import Topo
from mininet.util import dumpNodeConnections
class MyNet( Topo ):
def __init__( self ):
"Create custom topo."
# Initialize topology
Topo.__init__( self )
# Add hosts
h1 = self.addHost( 'h1' )
h2 = self.addHost( 'h2' )
...
h25 = self.addHost( 'h25' )
# Add switches
s1 = self.addSwitch( 's1' )
...
s6 = self.addSwitch( 's6' )
# Add links
self.addLink( s2, s1 ,bw=10)
self.addLink( s3, s1 ,bw=10)
self.addLink( s4, s1 ,bw=10)
self.addLink( s5, s1 ,bw=10)
self.addLink( s6, s1 ,bw=10)
self.addLink( h1, s2 ,bw=10)
self.addLink( h2, s2 ,bw=10)
self.addLink( h3, s2 ,bw=10)
self.addLink( h4, s2 ,bw=10)
self.addLink( h5, s2 ,bw=10)
self.addLink( h6, s3 ,bw=10)
self.addLink( h7, s3 ,bw=10)
self.addLink( h8, s3 ,bw=10)
self.addLink( h9, s3 ,bw=10)
self.addLink( h10, s3 ,bw=10)
self.addLink( h11, s4 ,bw=10)
...
self.addLink( h25, s6 ,bw=10)
topos = { 'MyNet': ( lambda: MyNet() ) }
我正在使用以下方式调用电话:
#sudo mn --custom MyNet.py --topo MyNet --controller=remote,ip=10.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13 --link tc
最佳答案
这是快速制作的。似乎正在发挥作用。我从 topolib.py 得到了一点
代码使用了递归。函数 addTree() 在其内部调用。
__author__ = 'Ehsan'
from mininet.node import CPULimitedHost
from mininet.topo import Topo
from mininet.net import Mininet
from mininet.log import setLogLevel, info
from mininet.node import RemoteController
from mininet.cli import CLI
from mininet.link import TCLink
"""
Instructions to run the topo:
1. Go to directory where this fil is.
2. run: sudo -E python <file name>
In this case it is: sudo -E python Tree_Generic_Topo.py
"""
class GenericTree(Topo):
"""Simple topology example."""
def build( self, depth=1, fanout=2 ):
# Numbering: h1..N, s1..M
self.hostNum = 1
self.switchNum = 1
def build( self, depth=1, fanout=2 ):
# Numbering: h1..N, s1..M
self.hostNum = 1
self.switchNum = 1
# Build topology
self.addTree(depth, fanout)
def addTree( self, depth, fanout ):
"""Add a subtree starting with node n.
returns: last node added"""
isSwitch = depth > 0
if isSwitch:
node = self.addSwitch( 's%s' % self.switchNum )
self.switchNum += 1
for _ in range( fanout ):
child = self.addTree( depth - 1, fanout )
self.addLink( node, child )
else:
node = self.addHost( 'h%s' % self.hostNum )
self.hostNum += 1
return node
def run():
c = RemoteController('c', '0.0.0.0', 6633)
# Change the args of GenericTree() to your desired values. You could even get them from command line.
net = Mininet(topo=GenericTree(depth=2, fanout=3), host=CPULimitedHost, controller=None)
net.addController(c)
net.start()
# installStaticFlows( net )
CLI(net)
net.stop()
# if the script is run directly (sudo custom/optical.py):
if __name__ == '__main__':
setLogLevel('info')
run()
关于python - 用于具有自定义带宽链接的通用树形拓扑的 Mininet 脚本,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31404953/