我的ONOS控制器无法识别主机（Mininet拓扑）

Question

我已经为拓扑编写了此代码：

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.log import setLogLevel, info
from mininet.node import OVSSwitch, Controller, RemoteController
from mininet.cli import CLI


class Project( Topo ):
    def build (self, **_opts ):

        # Add hosts
        h11 = self.addHost('h11', ip='192.168.1.10')
        h12 = self.addHost('h12', ip='192.168.1.11')
        h13 = self.addHost('h13', ip='192.168.1.12')
        h14 = self.addHost('h14', ip='192.168.1.13')
        h21 = self.addHost('h21', ip='192.168.2.10')
        h22 = self.addHost('h22', ip='192.168.2.11')
        h23 = self.addHost('h23', ip='192.168.2.12')
        h24 = self.addHost('h24', ip='192.168.2.13')
        h31 = self.addHost('h31', ip='192.168.3.10')
        h32 = self.addHost('h32', ip='192.168.3.11')
        h33 = self.addHost('h33', ip='192.168.3.12')
        h34 = self.addHost('h34', ip='192.168.3.13')

        # Add switches
        s1 = self.addSwitch('s1', cls=OVSSwitch, protocols ="OpenFlow13", ip='192.168.1.1')
        s2 = self.addSwitch('s2', cls=OVSSwitch, protocols ="OpenFlow13", ip='192.168.2.1')
        s3 = self.addSwitch('s3', cls=OVSSwitch, protocols ="OpenFlow13", ip='192.168.3.1')

        # Add links
        self.addLink(h11,s1)
        self.addLink(h12,s1)
        self.addLink(h13,s1)
        self.addLink(h14,s1)
        self.addLink(h21,s2)
        self.addLink(h22,s2)
        self.addLink(h23,s2)
        self.addLink(h24,s2)
        self.addLink(h31,s3)
        self.addLink(h32,s3)
        self.addLink(h33,s3)
        self.addLink(h34,s3)
        self.addLink(s1,s2)
        self.addLink(s1,s3)
        self.addLink(s2,s3)

def run():
   topo = Project()
   net = Mininet (topo=topo, controller=None)
   c1 = net.addController( 'c1', controller=RemoteController, ip='172.17.0.7')
   c1.start()
   net.start()
   CLI ( net )
   net.stop()

if '_main_':
    setLogLevel( 'info')
    run()

我使用以下脚本运行脚本：“ sudo python topology.py”

Creating network
Adding controller
Adding hosts: h11 h12 h13 h14 h21 h22 h23 h24 h31 h32 h33 h34 
Adding switches: s1 s2 s3 
Adding links: (h11, s1) (h12, s1) (h13, s1) (h14, s1) (h21, s2) (h22, s2) (h23, s2) (h24, s2) (h31, s3) (h32, s3) (h33, s3) (h34, s3) (s1, s2) (s1, s3) (s2, s3) 
Configuring hosts h11 h12 h13 h14 h21 h22 h23 h24 h31 h32 h33 h34  Connecting to remote controller at 172.17.0.7:6653
Starting controller c1 
Starting 3 switches s1 s2 s3 ...
Starting CLI: 
mininet>

到目前为止，一切都还不错，但是当我在ONOS CLI（我正在使用的控制器）中时，它无法检测到网络上的主机...我正在使用ONOS教程OVA（针对1.15.0版）。

刚安装完虚拟机并运行了上面的脚本后，我在ONOS上运行了命令以激活响应式转发：

onos > app activate org.onosproject.fwd

我可以在mininet的CLI上ping主机：

mininet > h11 ping -c 3 h31
...
mininet > pingall

仅在此ping之后，控制器才能看到/显示有关拓扑上主机的信息...控制器如何从开始实施拓扑开始执行该操作？

Answer 1

需要ONOS具有三个以上的应用程序。所需的应用程序是：

• 地址解析协议（ARP）代理；
• 链路层发现协议（LLDP）；
• 主机提供者。

交换机需要来自控制器或拓扑中主机的激励。