A question about changing AP parameters by controller. about mininet-wifi

[ramonfontes]

Hello Greg, This is really an interesting/relevant question! As probably you know the OpenFlow protocol was not designed for wireless networks and changes are required. In my opinion you should start with the experimenter field (I've never tried it before, but I think it is a great kick-off). On the other hand, another alternative is CAPWAP. OpenDayLight seems to support CAPWAP ( https://wiki.opendaylight.org/view/CAPWAP:Main), but I've never tried it before too. BTW I really appreciate if you update me with your future experience in this field. Please keep in mind that Mininet-WiFi relies in mac80211_hwsim to create/virtualize wireless interfaces and hostapd to virtualize Access Points. I know that hostapd works with Radius server and any solution in this direction should work. Regards, Ramon 2017-03-24 12:49 GMT-03:00 floppydrive6 <[email protected]>:

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Hi, I have a question as in the title. Is there a possibility to change AP's parameters such a AP range (I mean antenna power level), contention window size, channel etc. by a remote controller? I am afraid that controller supporting OpenFlow protocol (ex. some POX controller) can't do that, so have you got an idea how can I achieve that? I am asking because I want to create a SDN controller which could change AP's amounparameters based on amount of clients connected to AP but I have no idea how can I create that kind of controller and if I can test it using mininet-wifi. Thanks a lot for answer, Regards, Greg — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#58>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmevfos_MFLFD2Mw_7zOb5_icHUOVhks5ro-YJgaJpZM4Mobwj> .

[floppydrive6]

Hello Ramon,
Thanks for answer. I think that it will be possible to realize using CAPWAP or NETCONF, but do virtual APs emulated using Mininet-WiFi (as they are right now) support these protocols? I am asking because I do not know where could I change it. I know that they are virtualized using hostapd but I have no idea how can it be done. I have read somewhere that it is required to create an IPC between controller and APs but as You know I do not know if I have to change the source-code of Mininet-WiFi on my own (and I also do not what where there change should be) or just controller (ex. POX). I suppose that OpenFlow protocol does not send a information about current power level from AP to POX. Have you got an idea how can it be done?
Regards,
Greg

[ramonfontes]

Hello Greg, I think so. You can try both and see what happen. The manual of Mininet-WiFi should help you to comprehend how it works and I don't believe that changes in the source code is required. I'm here to help you if you need anyway. In my opinion you have to understand how CAPWAP works and how it manages the AP firstly. 2017-03-25 10:41 GMT-03:00 floppydrive6 <[email protected]>:

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Hello Ramon, Thanks for answer. I think that it will be possible to realize using CAPWAP or NETCONF, but do virtual APs emulated using Mininet-WiFi (as they are right now) support these protocols? I am asking because I do not know where could I change it. I know that they are virtualized using hostapd but I have no idea how can it be done. I have read somewhere that it is required to create an IPC between controller and APs but as You know I do not know if I have to change the source-code of Mininet-WiFi on my own (and I also do not what where there change should be) or just controller (ex. POX). I suppose that OpenFlow protocol does not send a information about current power level from AP to POX. Have you got an idea how can it be done? Regards, Greg — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#58 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmembZ4bPHYeH9nh-iovT-L6KJmcuUks5rpRmYgaJpZM4Mobwj> .

[floppydrive6]

Hi Ramon,
I installed OpenDayLight controller with CAPWAP plugin and ran: sudo mn --controller=remote. Mininet-WiFi connected to that controller (my controller ran at: 127.0.0.1:6633) and all flows were available in controller. According to instruction available here: https://wiki.opendaylight.org/view/CAPWAP:Lithium:Developer_Guide under "Discovered WTPs" header I tried to find out available APs which I can configure, but ODL displayed only ac-root controller, there were no emulated APs found. Have you got any idea how can I configure parameters like channel, power level etc. using CAPWAP? (I want to set this parameters using remote CAPWAP controller.) Because I am afraid that this feature is not supported by Mininet-WiFi. I know that via hostapd it is possible to configure CAPWAP-client and then you have to enter CAPWAP controller ip-address and it should work.
Regards,
Greg

[ramonfontes]

Hi Greg, I have no idea. Not yet. Did you get it via hostapd? How? I can replicate the same setup here and improve Mininet-WiFi in order to support capwap if necessary. 2017-04-04 7:27 GMT-03:00 floppydrive6 <[email protected]>:

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Hi Ramon, I installed OpenDayLight controller with CAPWAP plugin and ran: sudo mn --controller=remote. Mininet-WiFi connected to that controller (my controller ran at: 127.0.0.1:6633) and all flows were available in controller. According to instruction available here: https://wiki.opendaylight.org/view/CAPWAP:Lithium:Developer_Guide under "Discovered WTPs" header I tried to find out available APs which I can configure, but ODL displayed only ac-root controller, there were no emulated APs found. Have you got any idea how can I configure parameters like channel, power level etc. using CAPWAP? (I want to set this parameters using remote CAPWAP controller.) Because I am afraid that this feature is not supported by Mininet-WiFi. I know that via hostapd it is possible to configure CAPWAP-client and then you have to enter CAPWAP controller ip-address and it should work. Regards, Greg — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#58 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmeghdXdZnFyBMGQjhRpVCMNQHY1mAks5rshsNgaJpZM4Mobwj> .

[ramonfontes]

I just found it when googling: https://github.com/iosifpeterfi/openCAPWAP-OpenWRT/blob/master/hostapd_wrapper/hostapd.conf-ac#L26 Did you use something like that? 2017-04-04 8:47 GMT-03:00 Ramon Fontes <[email protected]>:

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Hi Greg, I have no idea. Not yet. Did you get it via hostapd? How? I can replicate the same setup here and improve Mininet-WiFi in order to support capwap if necessary. 2017-04-04 7:27 GMT-03:00 floppydrive6 ***@***.***>: > Hi Ramon, > I installed OpenDayLight controller with CAPWAP plugin and ran: sudo mn > --controller=remote. Mininet-WiFi connected to that controller (my > controller ran at: 127.0.0.1:6633) and all flows were available in > controller. According to instruction available here: > https://wiki.opendaylight.org/view/CAPWAP:Lithium:Developer_Guide under > "Discovered WTPs" header I tried to find out available APs which I can > configure, but ODL displayed only ac-root controller, there were no > emulated APs found. Have you got any idea how can I configure parameters > like channel, power level etc. using CAPWAP? (I want to set this parameters > using remote CAPWAP controller.) Because I am afraid that this feature is > not supported by Mininet-WiFi. I know that via hostapd it is possible to > configure CAPWAP-client and then you have to enter CAPWAP controller > ip-address and it should work. > Regards, > Greg > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <#58 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AEnmeghdXdZnFyBMGQjhRpVCMNQHY1mAks5rshsNgaJpZM4Mobwj> > . >

[floppydrive6]

Hi Ramon,
At this time I have no idea how it can be done, but I have found something like this: https://github.com/iosifpeterfi/openCAPWAP-OpenWRT (and https://github.com/carosio/meta-caros/blob/master/recipes-connectivity/hostapd/hostapd-capwap-ac-1.1/hostapd-capwap.patch) and I suppose it could help. I have not tried it yet.
Regards,
Greg

[ramonfontes]

Ok. Let's try to make it work. Tomorrow I'll try to compile hostapd in order to provide support to capwap according those references. Please let me know if you have any progress. 2017-04-04 9:14 GMT-03:00 floppydrive6 <[email protected]>:

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Hi Ramon, At this time I have no idea how it can be done, but I have found something like this: https://github.com/iosifpeterfi/openCAPWAP-OpenWRT (and https://github.com/carosio/meta-caros/blob/master/ recipes-connectivity/hostapd/hostapd-capwap-ac-1.1/hostapd-capwap.patch) and I suppose it could help. I did not tried it yet. Regards, Greg — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#58 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AEnmeo-mALU1bjFBo2V1nwl0ZA1epiFZks5rsjQQgaJpZM4Mobwj> .

[ramonfontes]

Dear Greg, I found some material that might help you: (i) http://www.altencalsoftlabs.com/resource-center/whitepapers/vWLC.pdf - It seems to be proprietary, but take a look on page 4. (ii) https://github.com/zqqiang/node-capwap/blob/71cc774f1a8e0940ca703f08c29b7e656a8fa3d4/doc/diagram.md (iii) https://github.com/ahmedshabib/opencapwap_hostapd_wrapper, specially https://github.com/ahmedshabib/opencapwap_hostapd_wrapper/blob/master/AC/hostapd/hostapd.conf. Please note that config file loads the capwap driver. I really enjoyed the last one. Although it requires some modification in order to talk with the new hostapd, in my opinion it's feasible. 2017-04-04 10:07 GMT-03:00 Ramon Fontes <[email protected]>:

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Ok. Let's try to make it work. Tomorrow I'll try to compile hostapd in order to provide support to capwap according those references. Please let me know if you have any progress. 2017-04-04 9:14 GMT-03:00 floppydrive6 ***@***.***>: > Hi Ramon, > At this time I have no idea how it can be done, but I have found > something like this: https://github.com/iosifpeterfi/openCAPWAP-OpenWRT > (and https://github.com/carosio/meta-caros/blob/master/recipes- > connectivity/hostapd/hostapd-capwap-ac-1.1/hostapd-capwap.patch) and I > suppose it could help. I did not tried it yet. > Regards, > Greg > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <#58 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AEnmeo-mALU1bjFBo2V1nwl0ZA1epiFZks5rsjQQgaJpZM4Mobwj> > . >

[ramonfontes]

https://github.com/vollero/openCAPWAP/tree/elena.ago Paper: http://onlinelibrary.wiley.com/doi/10.1002/nem.1949/full 2017-04-04 20:00 GMT-03:00 Ramon Fontes <[email protected]>:

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Dear Greg, I found some material that might help you: (i) http://www.altencalsoftlabs.com/resource-center/whitepapers/vWLC.pdf - It seems to be proprietary, but take a look on page 4. (ii) https://github.com/zqqiang/node-capwap/blob/ 71cc774f1a8e0940ca703f08c29b7e656a8fa3d4/doc/diagram.md (iii) https://github.com/ahmedshabib/opencapwap_hostapd_wrapper, specially https://github.com/ahmedshabib/opencapwap_ hostapd_wrapper/blob/master/AC/hostapd/hostapd.conf. Please note that config file loads the capwap driver. I really enjoyed the last one. Although it requires some modification in order to talk with the new hostapd, in my opinion it's feasible. 2017-04-04 10:07 GMT-03:00 Ramon Fontes ***@***.***>: > Ok. Let's try to make it work. Tomorrow I'll try to compile hostapd in > order to provide support to capwap according those references. Please let > me know if you have any progress. > > 2017-04-04 9:14 GMT-03:00 floppydrive6 ***@***.***>: > >> Hi Ramon, >> At this time I have no idea how it can be done, but I have found >> something like this: https://github.com/iosifpeterfi/openCAPWAP-OpenWRT >> (and https://github.com/carosio/meta-caros/blob/master/recipes-co >> nnectivity/hostapd/hostapd-capwap-ac-1.1/hostapd-capwap.patch) and I >> suppose it could help. I did not tried it yet. >> Regards, >> Greg >> >> — >> You are receiving this because you commented. >> Reply to this email directly, view it on GitHub >> <#58 (comment)>, >> or mute the thread >> <https://github.com/notifications/unsubscribe-auth/AEnmeo-mALU1bjFBo2V1nwl0ZA1epiFZks5rsjQQgaJpZM4Mobwj> >> . >> > >

[ramonfontes]

Still a first release: https://github.com/ramonfontes/opencapwap-mininet-wifi

[ramonfontes]

It's been over a month with no new data, so I'm going to close this. Feel free to reopen if there's new info.