由tc配置时的Mininet网络错误

我试图通过tc命令在我使用mininet创建的网络交换机部分的接口（端口）1上指定数据包丢失： sudo tc qdisc change dev s1-eth1 root netem loss 0.1% 但是gettring错误： RTNETLINK answers: Invalid argument

任何帮助，将不胜感激 .

Network Details:

它是Ubuntu 14.04上基于树形拓扑的mininet网络，深度= 2，扇出= 5.在第一级，交换机连接到5个交换机，每个交换机连接到5个主机 . 所有交换机都是OpenvSwitch .

Mininet network:

#!/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 ):
    "Simple topology example."

    def __init__( self ):
        "Create custom topo."

        # Initialize topology
        Topo.__init__( self )

        # Add hosts
        h1 = self.addHost( 'h1' )
        h2 = self.addHost( 'h2' )
        h3 = self.addHost( 'h3' )
        h4 = self.addHost( 'h4' )
        h5 = self.addHost( 'h5' )
        h6 = self.addHost( 'h6' )
        h7 = self.addHost( 'h7' )
        h8 = self.addHost( 'h8' )
        h9 = self.addHost( 'h9' )
        h10 = self.addHost( 'h10' )
        h11 = self.addHost( 'h11' )
        h12 = self.addHost( 'h12' )
        h13 = self.addHost( 'h13' )
        h14 = self.addHost( 'h14' )
        h15 = self.addHost( 'h15' )
        h16 = self.addHost( 'h16' )
        h17 = self.addHost( 'h17' )
        h18 = self.addHost( 'h18' )
        h19 = self.addHost( 'h19' )
        h20 = self.addHost( 'h20' )
        h21 = self.addHost( 'h21' )
        h22 = self.addHost( 'h22' )
        h23 = self.addHost( 'h23' )
        h24 = self.addHost( 'h24' )
        h25 = self.addHost( 'h25' )

    # Add switches
        s1 = self.addSwitch( 's1' )
        s2 = self.addSwitch( 's2' )
        s3 = self.addSwitch( 's3' )
        s4 = self.addSwitch( 's4' )
        s5 = self.addSwitch( 's5' )
        s6 = self.addSwitch( 's6' )

        # Add links
        self.addLink( s2, s1 ,bw=0.1)
        self.addLink( s3, s1 ,bw=10)
        self.addLink( s4, s1 ,bw=10)
        self.addLink( s5, s1 ,bw=10)
        self.addLink( s6, s1 ,bw=100)

        self.addLink( h1, s2 ,bw=0.1)
        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( h12, s4 ,bw=10)
        self.addLink( h13, s4 ,bw=10)
        self.addLink( h14, s4 ,bw=10)
        self.addLink( h15, s4 ,bw=10)

        self.addLink( h16, s4 ,bw=10)
        self.addLink( h17, s4 ,bw=10)
        self.addLink( h18, s4 ,bw=10)
        self.addLink( h19, s4 ,bw=10)
        self.addLink( h20, s4 ,bw=10)

        self.addLink( h21, s6 ,bw=10)
        self.addLink( h22, s6 ,bw=10)
        self.addLink( h23, s6 ,bw=10)
        self.addLink( h24, s6 ,bw=10)
        self.addLink( h25, s6 ,bw=100)

topos = { 'MyNet': ( lambda: MyNet() ) }
#sudo mn --custom MyNet.py --topo MyNet --controller=remote,ip=10.0.0.1,port=6633 --switch ovsk,protocols=OpenFlow13 --link tc