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inband control issue

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gao weiwei

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Nov 22, 2024, 4:06:51 AM11/22/24
to mininet-wifi-discuss
Can someone help me? When I'm using in-band control, why am I not receiving packet-in messages after starting the controller on the station?  

#!/usr/bin/python

import sys
import os
from mininet.log import setLogLevel, info
from mn_wifi.cli import CLI
from mn_wifi.net import Mininet_wifi
from mn_wifi.node import UserAP
from mininet.node import RemoteController
from mininet.term import makeTerm

class InbandController(RemoteController):
    def checkListening(self):
        "Overridden to do nothing."
        return

def topology():
    net = Mininet_wifi(controller=None)

    info("*** creat nodes\n")
   
    ap1 = net.addAccessPoint('ap1', cls=UserAP, ssid='ssid-ap1', mode='g', channel='1',
                             position='50,50,0', inband=True, datapath='user', protocols='OpenFlow13')
    ap2 = net.addAccessPoint('ap2', cls=UserAP, ssid='ssid-ap2', mode='g', channel='6',
                             position='150,50,0', inband=True, datapath='user', protocols='OpenFlow13')
    ap3 = net.addAccessPoint('ap3', cls=UserAP, ssid='ssid-ap3', mode='g', channel='11',
                             position='100,100,0', inband=True, datapath='user', protocols='OpenFlow13')

   
    sta1 = net.addStation('sta1', ip='10.0.0.1/8', position='30,60,0')
    sta2 = net.addStation('sta2', ip='10.0.0.2/8', position='70,60,0')
    sta3 = net.addStation('sta3', ip='10.0.0.3/8', position='130,60,0')
    sta4 = net.addStation('sta4', ip='10.0.0.4/8', position='170,60,0')
    sta5 = net.addStation('sta5', ip='10.0.0.5/8', position='90,120,0')
    sta6 = net.addStation('sta6', ip='10.0.0.6/8', position='110,120,0')
    sta7 = net.addStation('sta7', ip='10.0.0.7/8', position='50,80,0')
    sta8 = net.addStation('sta8', ip='10.0.0.8/8', position='150,80,0')
    sta9 = net.addStation('sta9', ip='10.0.0.9/8', position='100,140,0')
    sta10 = net.addStation('sta10', ip='10.0.0.10/8', position='100,160,0')

   
    c1 = net.addController('c1', controller=InbandController, ip='10.0.0.1', port=6653)
    c2 = net.addController('c2', controller=InbandController, ip='10.0.0.3', port=6653)
    c3 = net.addController('c3', controller=InbandController, ip='10.0.0.5', port=6653)

    info("*** configure WiFi node\n")
    net.configureWifiNodes()

    net.plotGraph(max_x=200, max_y=200)

    info("*** creat links\n")
   
    net.addLink(sta1, ap1)
    net.addLink(sta2, ap1)
    net.addLink(sta7, ap1)
    net.addLink(sta3, ap2)
    net.addLink(sta4, ap2)
    net.addLink(sta8, ap2)
    net.addLink(sta5, ap3)
    net.addLink(sta6, ap3)
    net.addLink(sta9, ap3)
    net.addLink(sta10, ap3)

   
    net.addLink(ap1, ap2)
    net.addLink(ap2, ap3)
    net.addLink(ap3, ap1)

    info("*** start network\n")
    net.build()

   
    ap1.setIP('10.0.0.11/8', intf='ap1-eth2')
    ap2.setIP('10.0.0.12/8', intf='ap2-eth2')
    ap3.setIP('10.0.0.13/8', intf='ap3-eth2')


    c1.start()
    c2.start()
    c3.start()
    ap1.start([c1])
    ap2.start([c2])
    ap3.start([c3])

   
    net.staticArp()

    info("*** start CLI\n")
    CLI(net)

    info("*** stop network\n")
    net.stop()



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

701860046CF51D38F6D3B4E5D556668B.png091668B535F8DF605182255F13C2B1E6.pngD220E2BED4B24FC989F08605062A8A55.png

Ramon Fontes

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Nov 22, 2024, 4:57:42 AM11/22/24
to gao weiwei, mininet-wifi-discuss
Aps don't have ip addresses and they cannot establish communication with the controller.

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gao weiwei

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Nov 26, 2024, 1:29:34 PM11/26/24
to mininet-wifi-discuss
  Hello, I have assigned IP addresses to the APs, but it still doesn't work. The controller cannot receive packet-in messages from the APs.  B03CCE9F47E8948BDD7E7D2E7C7A40FE.pngEC80FBE4E730B52B4FF0ADBC8C03284F.png

#!/usr/bin/python

import sys
import os
from mininet.log import setLogLevel, info
from mn_wifi.cli import CLI
from mn_wifi.net import Mininet_wifi
from mn_wifi.node import UserAP
from mininet.node import RemoteController
from mininet.term import makeTerm

class InbandController(RemoteController):
    def checkListening(self):
        "Overridden to do nothing."
        return

def topology():
    net = Mininet_wifi(controller=None)

    info("*** creat nodes\n")
   
    ap1 = net.addAccessPoint('ap1', cls=UserAP, ssid='ssid-ap1', mode='g', channel='1',ip='10.0.0.11/8',mac='00:00:00:00:00:11',position='50,50,0', inband=True, datapath='user', protocols='OpenFlow13')
    ap2 = net.addAccessPoint('ap2', cls=UserAP, ssid='ssid-ap2', mode='g', channel='6',ip='10.0.0.12/8',mac='00:00:00:00:00:12',position='150,50,0', inband=True, datapath='user', protocols='OpenFlow13')
    ap3 = net.addAccessPoint('ap3', cls=UserAP, ssid='ssid-ap3', mode='g', channel='11',ip='10.0.0.13/8',mac='00:00:00:00:00:13',position='100,100,0', inband=True, datapath='user', protocols='OpenFlow13')


   
    sta1 = net.addStation('sta1', ip='10.0.0.1/8', position='30,60,0')
    sta2 = net.addStation('sta2', ip='10.0.0.2/8', position='70,60,0')
    sta3 = net.addStation('sta3', ip='10.0.0.3/8', position='130,60,0')
    sta4 = net.addStation('sta4', ip='10.0.0.4/8', position='170,60,0')
    sta5 = net.addStation('sta5', ip='10.0.0.5/8', position='90,120,0')
    sta6 = net.addStation('sta6', ip='10.0.0.6/8', position='110,120,0')
    sta7 = net.addStation('sta7', ip='10.0.0.7/8', position='50,80,0')
    sta8 = net.addStation('sta8', ip='10.0.0.8/8', position='150,80,0')
    sta9 = net.addStation('sta9', ip='10.0.0.9/8', position='100,140,0')

   
    c1 = net.addController('c1', controller=InbandController, ip='10.0.0.1', port=6653)
    c2 = net.addController('c2', controller=InbandController, ip='10.0.0.3', port=6653)
    c3 = net.addController('c3', controller=InbandController, ip='10.0.0.5', port=6653)

    info("*** configure WiFi node\n")
    net.configureWifiNodes()

    net.plotGraph(max_x=200, max_y=200)

    info("*** creat links\n")
   
    net.addLink(sta1, ap1)
    net.addLink(sta2, ap1)
    net.addLink(sta7, ap1)
    net.addLink(sta3, ap2)
    net.addLink(sta4, ap2)
    net.addLink(sta8, ap2)
    net.addLink(sta5, ap3)
    net.addLink(sta6, ap3)
    net.addLink(sta9, ap3)

   
    net.addLink(ap1, ap2)
    net.addLink(ap2, ap3)
    net.addLink(ap3, ap1)

    info("*** start network\n")
    net.build()

    c1.start()
    c2.start()
    c3.start()
    ap1.start([c1])
    ap2.start([c2])
    ap3.start([c3])

    info("*** start CLI\n")
    CLI(net)

    info("*** stop network\n")
    net.stop()
   
   
if __name__ == '__main__':
    setLogLevel('info')
    topology()

Ramon Fontes

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Nov 26, 2024, 1:35:49 PM11/26/24
to gao weiwei, mininet-wifi-discuss
Honestly, I wasn't expecting such a response. I recommend providing as much information as possible to help troubleshoot the issue effectively. For instance:

Have you installed Bofuss?
Did you verify the L2 connectivity?
Have you tried performing a simple ping between the station and the AP?
What else?

Providing these details will make it easier to diagnose the problem and offer appropriate solutions.



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