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Wi5 / odin-wi5-agent

Click-based odin agent that runs on access points
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How to confirm mobile station channel transition (de-assoc and assoc) #28

Open sonjinho opened 7 years ago

sonjinho commented 7 years ago

Hi folks,

I am testing simple loadbalancing scenario in different channels.

While doing it, I found that switching AP seems not working properly. To test it in details, I am checking mobile station first disconnect original AP after receiving CSA message. However, I found that it seems hard to confirm whether mobile station actually dis-assoc original AP or not. Please kindly let me know if there is a convenient way.

Many thanks in advance.

josemariasaldana commented 7 years ago

Hi,

I must confess we have not checked the simpleloadbalancing application. We have focused on MobilityManager so far (https://github.com/Wi5/odin-wi5/wiki/Application-MobilityManager). Therefore, simpleloadbalancer is still as Lalith Suresh left it.

One thing we have seen is that, when the STA receives the last CSA, it switches to the new channel, but it waits for a number of beacons (maybe 2, 3 or 4) in the new channel. Once it receives them, it starts working in the new channel.

You can have a look to http://diec.unizar.es/~jsaldana/personal/letter_handoff_2016.pdf

The next step in our plans is to release a channel assignment application for the APs, and to develop a new load balancing application. We will upload them as soon as they are ready.

sonjinho commented 7 years ago

Thank you for your reply.

I think it was confusing you because of the inaccurate question.

I have been testing the reference you sent.

The CSA and Beacon messages could be seen in monitoring mode (by Wireshark), but the up /down stream traffic did not flow to the channel (AP1 -> AP2) handover by the station.

Odin Agent(AP2) debugging can see add_lvap and station list increase.

However, the station didn't associate. It just repeats the authentication.

Is there anything I need to check?

josemariasaldana commented 7 years ago

Perhaps the DHCP? Does it assign an IP address to the STA?