Unable ping in sdn-vanet when car moving

[nonhetnuoccham]

Hi sir,
I am having a project about sdn in vanet and I must simulate it in mininet-wifi . After running code, it is very good and i can ping 2 car in 2 ap, but after a few minute i cannot ping 2 car in 2 ap. This is my code:

import sys
from random import randint

from mininet.node import DefaultController, RemoteController
from mininet.log import setLogLevel, info
from mn_wifi.cli import CLI
from mn_wifi.net import Mininet_wifi
from mn_wifi.link import wmediumd, adhoc,mesh
from mn_wifi.wmediumdConnector import interference

def topology(args):
"Create a network."
net = Mininet_wifi(controller=RemoteController, roads=4,
link=wmediumd, wmediumd_mode=interference)

info("*** Creating nodes\n")

for id in range(0, 10):
min_ = randint(1, 4)
max_ = randint(11, 30)
net.addCar('car%s' % (id+1), wlans=2, min_speed=min_, max_speed=max_)

rsu11 = net.addAccessPoint(
'RSU11', ssid='vanet-ssid', mode='g', position='2600,3500,0', proto='batmand', channel='1', intf='RSU11-wlan1',
ht_cap='HT40+')
rsu12 = net.addAccessPoint(
'RSU12', ssid='vanet-ssid', mode='g', position='2800,3500,0', proto='batmand', channel='6', intf='RSU12-wlan1',
ht_cap='HT40+')
rsu13 = net.addAccessPoint(
'RSU13', ssid='vanet-ssid', mode='g', position='3000,3500,0', proto='batmand', channel='11', intf='RSU13-wlan1',
ht_cap='HT40+')
rsu14 = net.addAccessPoint(
'RSU14', ssid='vanet-ssid', mode='g', position='3200,3500,0', proto='batmand', channel='11', intf='RSU14-wlan1',
ht_cap='HT40+')
c1 = net.addController('c1')
info("*** Configuring Propagation Model\n")
net.setPropagationModel(model="logDistance", exp=4)

info("*** Configuring wifi nodes\n")
net.configureWifiNodes()

info("*** Associating and Creating links\n")
net.addLink(rsu11, rsu12)
net.addLink(rsu11, rsu13)
net.addLink(rsu11, rsu14)

for car in net.cars:
net.addLink(car, cls=mesh, intf='%s-wlan1' % car,
ssid='adhocNet', proto='batmand', mode='g', channel=5,
ht_cap='HT40+')

if '-p' not in args:
net.plotGraph(max_x=500, max_y=500)

net.startMobility(time=0)

info("*** Starting network\n")
net.build()
c1.start()
rsu11.start([c1])
rsu12.start([c1])
rsu13.start([c1])
rsu14.start([c1])
for id, ap in enumerate(net.aps):
ap.setIP('192.168.1.%s/24' % (id+11), intf='%s-wlan1' % ap)
ap.setIP('10.0.1.%s/24' % (id+11), intf='%s-eth2' % ap)
info("*** Running CLI\n")
CLI(net)

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

if name == 'main':
setLogLevel('info')
topology(sys.argv)

ping result:

after a few minute, I cannot ping 2 car in 2 ap

Can you show my problem and how to fix it.

[ramonfontes]

Could you please tell us about the flow timeout? How is the controller handling flow timeouts?

[nonhetnuoccham]

when I cannot ping and I run dpctl dump-flows it show:

[ramonfontes]

You didn't answer my question.. :(

[nonhetnuoccham]

How i can show it, i never use controller before and having many thing i donnot know

[ramonfontes]

How i can show it, i never use controller before and having many thing i donnot know

Please don't open a new issue if you don't know exactly what is going wrong. I suggest you to go through related issues since this issue has already been explored in the past.