remote controller cannot detect normal OVSSwitch when there are aps about mininet-wifi

[zhangzee]

the mobilityDemo.py is like this: the remote controller(onos) cannot detect the s1 and s2 .so sta1 cannot ping h1 successfully.

#!/usr/bin/python

from mininet.net import Mininet
from mininet.node import Controller
from mininet.cli import CLI
from mininet.log import setLogLevel, info

#from mininet.node import OVSKernelSwitch, Controller ,OVSSwitch
#from mininet.link import TCLink

def emptyNet():

#net = Mininet( controller=Controller )
net = Mininet( listenPort = 6633,topo=None)

info( '*** Adding controller\n' )
mycontroller = RemoteController("onos",ip="172.21.6.219")
net.controllers = [mycontroller]
net.nameToNode["onos"] = mycontroller
#net.addController( 'mycontroller' )

info( '*** Adding controller\n' )
#net.addController( 'c0' )
info( '*** Adding hosts\n' )
h1 = net.addHost( 'h1', ip='192.168.0.6/24' )
h2 = net.addHost( 'h2', ip='192.168.0.5/24' )

info( '*** Adding switch\n' )
s1 = net.addSwitch( 's1' )
s2 = net.addSwitch( 's2' )

sta1 = net.addStation( 'sta1', mac='00:00:00:00:00:02', ip="192.168.0.1/24" ,range='20' )
ap1 = net.addAccessPoint( 'ap1', ssid= 'ap1-ssid', mode= 'g', channel= '1', position='30,50,0', range='30' )
ap2 = net.addAccessPoint( 'ap2', ssid= 'ap2-ssid', mode= 'g', channel= '1', position='90,50,0', range='30' )
ap3 = net.addAccessPoint( 'ap3', ssid= 'ap3-ssid', mode= 'g', channel= '1', position='130,50,0', range='30' )

print "*** Configuring wifi nodes"
net.configureWifiNodes()

net.addLink(s1, s2)
net.addLink(s1, h1)
net.addLink(s2, h2)
net.addLink(s1, ap1)
net.addLink(s1, ap2)
net.addLink(s2, ap3)

net.plotGraph(max_x=160, max_y=160)

net.startMobility(startTime=0, AC='ssf')
net.mobility(sta1, 'start', time=20, position='1,50,0')
net.mobility(sta1, 'stop', time=79, position='159,50,0')
net.stopMobility(stopTime=80) 

info( '*** Starting network\n')
net.start()

info( '*** Running CLI\n' )
CLI( net )

info( '*** Stopping network' )
net.stop()

if name == 'main':
setLogLevel( 'info' )
emptyNet()

[zhangzee]

a intresting question is that sta1 can ping h1 when it moved to ap3 ....but the ttl time is so long .

[ramonfontes]

Dear, Both switch and AP have the same ID number and consequently the same DPID (s1, s2, ap1 and ap2). Try to change the ID of APs to ap3 and ap4, and let me know if it works please.

…

Sent from my android

On 9 Jan 2017 00:52, "zhangze" ***@***.***> wrote: I programe a python script that hava normal OVSSwitchs and aps based on examples/handover.py .But the remote controller just can detect aps and cannot detect the normal switch through addSwitch('s1') method . what's more ,when I replace all the switchs to aps ,the ping ttl time between two hosts under one ap is up to more than 10ms rather than less 0.05ms under one normal OVSSwitch ....... — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#30>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmeoav3h0UESsy5VIc0uSwZzraGfuZks5rQa7_gaJpZM4Ld6mz> .

[zhangzee]

thank for you help @ramonfontes
when I changed the ap1 ,ap2,ap3 to ap3 ap4 ap5, the remote controller can indeed detect the s1 and s2. But there is no diffrent with define s1 to ap in this way. I want to know if I use the method net.addSwitch('s1') cannot add a normal switch not an ap ?? As we konw the method is add a normal OVSSwitch in mininet. if the mininet-wifi change the method??

[ramonfontes]

net.addSwitch('s1') adds the same switch as Mininet does. So, we didn't change net.addSwitch().

You can add the parameter dpid when add switch and ap. For example:
net.addSwitch('s1',dpid='0000000100000001')
net.addAccessPoint('ap1',dpid='0000000100000002')

should work fine.

[zhangzee]

thank you for you help . It works.
But when sta1 ping h1 , the ttl time up to more than 10ms like the up picture which is correct or normal to simulate the real wireless network? when h1 ping h2 ,the ttl time is less than 0.05ms. can I change the wireless link bandwidth to reduce the ttl time . Thank you .

[ramonfontes]

You may change the formula for bw, loss, latency and delay. Please take a look at the section "Customizing Equations" in the Mininet-WiFi's manual. 2017-01-09 23:16 GMT-03:00 zhangze <[email protected]>:

…

thank you for you help . It works. But when sta1 ping h1 , the ttl time (more than 10ms like the up picture ) is correct or normal to simulate the real wireless network? when h1 ping h2 ,the ttl time is less than 0.05ms. can I change the wireless link rodio to decreate the ttl time . Thank you . — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#30 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmetlLS9MLHlZCXb_UjbcBr_yV9U9rks5rQunwgaJpZM4Ld6mz> .

[zhangzee]

Is this manual ? But there is no this section "Customizing Equations" . And when I set the link bw to 100M It doesn't works.

[ramonfontes]

Dear, You can find that section at page 15. 2017-01-11 4:48 GMT-03:00 zhangze <[email protected]>:

…

Is this manual ? But there is no this section "Customizing Equations" . And when I set the link bw to 100M It doesn't works. [image: image] <https://cloud.githubusercontent.com/assets/22088840/21839850/017a4c26-d815-11e6-8c9b-9c3e5a481f43.png> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#30 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmetuZCcF-TyNv7qB-HjRPugQJo0dlks5rRIk9gaJpZM4Ld6mz> .

[ramonfontes]

Hello,

Did you solve the problem?

[zhangzee]

sorry, I can't find the method to setbw, loss, latency and delay. And I didn't get help from examples/wifiPropagationModel.py refered at page 15 . So can you give me a example to change these parameters ? Thank you .

[ramonfontes]

I don't know where did you get the manual, but from https://www.dropbox.com/s/jgkhsdrz736e4q2/mininet-wifi-draft-manual.pdf?dl=0 (URL available at the source code page) you can find that subsection at page 15. By calling net.setChannelEquation() you'll be able to change the formula for bw, loss, latency and delay. BTW, does your scenario has mobility? 2017-01-13 1:38 GMT-03:00 zhangze <[email protected]>:

…

sorry, I can't find the method to setbw, loss, latency and delay. And I didn't get help from examples/wifiPropagationModel.py refered at page 15 . So can you give me a example to change these parameters ? Thank you . — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#30 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmejUDoMj4jtZraC2QcfnZLTGmQeJQks5rRv-rgaJpZM4Ld6mz> .

[zhangzee]

perfect ! Thank you very much .
And my scenario can support mobility .
haha

[ramonfontes]

Good. Please close the issue if it is solved.