Wireless Access

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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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Static positioned clients disconnect from WiFi as if doing roaming

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  • 1.  Static positioned clients disconnect from WiFi as if doing roaming

    Posted Nov 29, 2018 10:22 AM

    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 !



  • 2.  RE: Static positioned clients disconnect from WiFi as if doing roaming

    EMPLOYEE
    Posted Nov 29, 2018 11:18 AM

    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?



  • 3.  RE: Static positioned clients disconnect from WiFi as if doing roaming

    Posted Nov 30, 2018 05:39 AM

    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 ...