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Static positioned clients disconnect from WiFi as if doing roaming

I have some clients ( that are not moving around ) that disconnects randomly . They operate every day from their same position/desk and

they are positioned in different places with different AP that shoul cover them .

Often 2 clients in same desk has different behaviour , one working with no problem at all , the other disconnecting every few minutes . Clients are windows 10 or windows 7 PC , MacOsx , IOS , Android.

 

Issuing the command : Show ap client trail-info <client macaddress>

I get different answers :

 

1) Deauth Reason = Ptk Challenge Failed Alert STA has roamed to another AP

or
2) Deauth Reason = STA has roamed to another AP Alert STA has roamed to another AP

or
3) Deauth Reason = Requested authentication algorithm not supported Alert STA has roamed to another AP

 

This an example of " strange roaming " , 20:a6:cd:88:ea:e1 is the mac address for 802.11 g HT and 20:a6:cd:88:ea:f1 802.11.a VHT in the same AP , band steering is active with preferred band 5GHz .

 

20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 29 16:38:52
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 29 16:38:52
20:a6:cd:88:ea:f1 Autostar PorMer09_Reception 202 Nov 29 16:38:52
20:a6:cd:88:ea:f1 Autostar PorMer09_Reception 202 Nov 29 16:38:50
20:a6:cd:88:ea:f1 Autostar PorMer09_Reception 202 Nov 29 16:38:50
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 29 16:38:50
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 29 16:36:17
34:fc:b9:53:0a:01 Autostar PorMer04_Salone Smart 202 Nov 29 16:36:17
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 29 16:36:17
34:fc:b9:53:0a:01 Autostar PorMer04_Salone Smart 202 Nov 29 16:36:17
Num Mobility Trails:10


This is client jumping between adiacent APs :


34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:38:56
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:38:56
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 28 10:36:01
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 28 10:34:55
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:34:55
20:a6:cd:88:ea:e1 Autostar PorMer09_Reception 202 Nov 28 10:34:55
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:27:02
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:27:02
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:27:02
34:fc:b9:53:0c:f1 Autostar PorMer05__uffici 1p 202 Nov 28 10:27:02

 

Where do I need to focus my troubleshooting ?

 

Thanks a lot !

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Guru Elite

Re: Static positioned clients disconnect from WiFi as if doing roaming

If a clients roams while stationary, it suggests that the transmit power of neighboring access points his too high.

 

How many access points do you have?


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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New Contributor

Re: Static positioned clients disconnect from WiFi as if doing roaming

Thanks for you answer .

 

There was 3 Access Points covering that area , so there is for sure lot of coverage . I already tried to switch off the radio (spectrum mode ) in one of the APs , which was giving a " redundand " coverage . But there was no improvement in client connection stability . 

Could it be an issue regarding Band Steering ? 

 

I set one of the problematic client on 2,4 GHz only and another one on 5 Ghz only . Looks like those clients are going better now ... but this could be just a random good moment ... 

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