Question

我是使用mininet和RYU控制器的新手。我在RYU中实现了Dijkstra算法，如-> http://csie.nqu.edu.tw/smallko/sdn/dijkstra_ryu.htm

所述

在mininet上，我创建了如下所示的自定义拓扑。但是在mininet拓扑上运行控制器时，发生以下错误-

不支持的版本0x1。如果可能，将开关设置为在数据路径上使用版本[4]之一（'127.0.0.1'，50884）

我不知道如何在拓扑中将交换机的版本更改为1.3。我也不知道如何从链接中更改RYU代码中的交换协议版本。

请帮帮我！！！

# THE MININET TOPOLOGY
#!/usr/bin/python

from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSController
from mininet.node import CPULimitedHost, Host, Node
from mininet.node import OVSKernelSwitch, UserSwitch
from mininet.node import IVSSwitch
from mininet.cli import CLI
from mininet.log import setLogLevel, info
from mininet.link import TCLink, Intf
from subprocess import call

def myNetwork():

    net = Mininet( topo=None,
                   build=False,
                   ipBase='10.0.0.0/8')

    info( '*** Adding controller\n' )
    c0=net.addController(name='c0',
                      controller=RemoteController,
                      protocol='tcp',
                      port=6633)

    info( '*** Add switches\n')
    s5 = net.addSwitch('s5', cls=OVSKernelSwitch)
    s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
    s4 = net.addSwitch('s4', cls=OVSKernelSwitch)
    s9 = net.addSwitch('s9', cls=OVSKernelSwitch)
    s6 = net.addSwitch('s6', cls=OVSKernelSwitch)
    s8 = net.addSwitch('s8', cls=OVSKernelSwitch)
    s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
    s10 = net.addSwitch('s10', cls=OVSKernelSwitch)
    s11 = net.addSwitch('s11', cls=OVSKernelSwitch)
    s3 = net.addSwitch('s3', cls=OVSKernelSwitch)
    s7 = net.addSwitch('s7', cls=OVSKernelSwitch)

    info( '*** Add hosts\n')
    h10 = net.addHost('h10', cls=Host, ip='10.0.0.10', defaultRoute=None)
    h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
    h5 = net.addHost('h5', cls=Host, ip='10.0.0.5', defaultRoute=None)
    h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
    h11 = net.addHost('h11', cls=Host, ip='10.0.0.11', defaultRoute=None)
    h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None)
    h6 = net.addHost('h6', cls=Host, ip='10.0.0.6', defaultRoute=None)
    h9 = net.addHost('h9', cls=Host, ip='10.0.0.9', defaultRoute=None)
    h4 = net.addHost('h4', cls=Host, ip='10.0.0.4', defaultRoute=None)
    h7 = net.addHost('h7', cls=Host, ip='10.0.0.7', defaultRoute=None)
    h8 = net.addHost('h8', cls=Host, ip='10.0.0.8', defaultRoute=None)

    info( '*** Add links\n')
    net.addLink(h1, s1)
    net.addLink(h2, s2)
    net.addLink(s3, h3)
    net.addLink(s4, h4)
    net.addLink(s5, h5)
    net.addLink(h6, s6)
    net.addLink(s7, h7)
    net.addLink(s8, h8)
    net.addLink(s9, h9)
    net.addLink(s10, h10)
    net.addLink(h11, s11)
    net.addLink(s1, s6)
    net.addLink(s6, s3)
    net.addLink(s3, s1)
    net.addLink(s3, s7)
    net.addLink(s6, s4)
    net.addLink(s4, s5)
    net.addLink(s5, s9)
    net.addLink(s9, s8)
    net.addLink(s8, s2)
    net.addLink(s7, s8)
    net.addLink(s9, s10)
    net.addLink(s10, s11)
    net.addLink(s2, s11)
    net.addLink(s7, s5)

    info( '*** Starting network\n')
    net.build()
    info( '*** Starting controllers\n')
    for controller in net.controllers:
        controller.start()

    info( '*** Starting switches\n')
    net.get('s5').start([c0])
    net.get('s1').start([c0])
    net.get('s4').start([c0])
    net.get('s9').start([c0])
    net.get('s6').start([c0])
    net.get('s8').start([c0])
    net.get('s2').start([c0])
    net.get('s10').start([c0])
    net.get('s11').start([c0])
    net.get('s3').start([c0])
    net.get('s7').start([c0])

    info( '*** Post configure switches and hosts\n')

    CLI(net)
    net.stop()

if __name__ == '__main__':
    setLogLevel( 'info' )
    myNetwork()

Answer 1

要将Openflow 1.3与ryu一起使用，请在您的ryu控制器中导入该版本：

from ryu.base import app_manager
from ryu.controller import ofp_event
from ryu.controller.handler import CONFIG_DISPATCHER, MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3

class Controller(app_manager.RyuApp):
  OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]  # Use OpenFlow 1.3.x

  def __init__(self, *args, **kwargs):
    super(Controller, self).__init__(*args, **kwargs)

Answer 2

添加ovsk开关以支持openflow协议：

$ sudo mn --typo tree，3 --mac --controller = remote，ip = 127.0.0.1，port = 5366 --switch = ovsk，protocols = OpenFlow13

OFP_VERSIONSsrc，doc定义了控制器应用程序支持的OpenFlow版本的列表。通常在应用程序中将其指定为与Ryu支持的OpenFlow版本兼容OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]

ryu自定义脚本未与自定义mininet拓扑一起运行

2 个答案: