client disconnected from access point due to 4 way handshake failed (timeout expired)

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  • Updated 4 weeks ago
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I have access point that is controlled by Smartzone 100. Sometimes, clients who have connected to the access point are suddenly disconnected from the access point and some time later can be connected again automatically. For wlan i use a radius for authentication

Based on the results of the troubleshoot that I did. I get the reason for the 4way handshake fail (timeout expired)



Please help how to fix it ?

Thank you,


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Yuki Framana Ginting

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  • excited

Posted 3 months ago

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Vincent Arriola

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I am seeing this too on my 1000+ chromebooks in education. I have opened a ticket and they are reviewing logs that I sent them.

SmartZone 100 and R600 APs
No Radius authentication for me, though. Just WPA2 PSK
(Edited)
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Vincent Arriola

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Have you gotten anywhere with this, Yuki? I still have not heard back from support.
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Yuki Framana Ginting

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HiĀ 
previously I also had an open ticket. for this problem, they request to get packet capture when this problem occurs. but this is difficult for me to do, because I have to get packet capture exactly when this problem occurs (real time).
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Yuki Framana Ginting

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Hi,

Did you get the update from support?
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Vincent Arriola

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Sorry, no. They have asked for another packet capture and have been sitting on it since Friday. I'm definitely not thrilled with Ruckus support thus far. I've got thousands of students impacted and it's taking days to hear anything back. Even just a "hey we're still looking at this" would be nice.
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Kyle Williams

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Did you ever get an update on this? I am running into the same situation with a wireless printer.
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Vincent Arriola

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The latest was that we narrowed it down to a single model of Chromebook causing the issue. We have about 1000 of these Chromebooks (Acer c810). Basically they get stuck in this failure loop and it occupies all of the airtime....effectively stopping ALL devices from connecting to the access point. We took some more detailed packet captures about a week ago and I'm waiting to hear the results. I'm also talking to Google who is in the same position - reviewing all of the logs on their end. Sorry, wish I had more to share.
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Terencio Soler

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Try enabling "OFDM Only" as a workaround while you get an SAT's response, in case you're not using 802.11b devices. I managed to fix this behaviour with an "Acer Aspire M" laptop