Wireless Access

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  • 1.  Clients Roaming (Handoff) HELP

    Posted Oct 31, 2021 07:10 PM
    Hi everyone,

    I have a problem in a very specific place (restaurant), when a tablet/phone/computer try to move from one place to another (Roaming from AP to another AP) it loses connectivity and (for me and the CLIENT) it takes more than usual to regain connectivity with the network. I ping the tablet continuously and saw many packets loss when roaming.). I even did a WiFi survey and seems pretty much all good. In happens with every device but more with low end devices.

    The client needs seemless and fast roaming because the waiters are going to use a tablet to order food from clients, meaning they're constantly moving.

    The two APs at the top: Aruba 305 
    The bottom AP: Aruba 365 (AP is outside, like in a terrace)

    Currently running AOS Aruba7220 8.8.0.1.
    Using WPA2 personal and brigde mode for the VLAN tag


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    Diego Joubert
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  • 2.  RE: Clients Roaming (Handoff) HELP

    Posted Oct 31, 2021 09:44 PM
    What kind of client is it?
    What band 2.4 or 5ghz does the client operate on?
    What is the transmit power of all the access points?
    Why bridge mode?

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    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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  • 3.  RE: Clients Roaming (Handoff) HELP

    Posted Oct 31, 2021 10:55 PM
    What kind of client is it?
    Don't know what you mean with clients but their problem is with the tablets the waiters use

    What band 2.4 or 5ghz does the client operate on?
    They use two tablets, one lenovo that works only 2.4GHz and a Samsung (I think) both bands.

    What is the transmit power of all the access points?
    The default one by the controller. 
    2.4 (6 Min Tx EIRP) (9 Max Tx EIRP)
    5 ( 12 Min Tx EIRP) (18 Max Tx EIRP)

    Why bridge mode?
    Requirement of the client...


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    Diego Joubert
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  • 4.  RE: Clients Roaming (Handoff) HELP

    Posted Nov 01, 2021 02:01 AM
    I would increase the max TX EIRP and minimum on the 2.4ghz band to 12 or 15 (min 12 and max 12 or min 15 and max 15) and see if it improves.  It would be hard to get any RF through the wall at 9 EIRP to roam smoothly from the indoor to the outdoor AP.

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    Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
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  • 5.  RE: Clients Roaming (Handoff) HELP

    Posted Nov 01, 2021 10:52 PM
    I'll try that tomorrow and see how it goes. It's a glass dividing the terrace with the inside.

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    Diego Joubert
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  • 6.  RE: Clients Roaming (Handoff) HELP

    Posted Nov 01, 2021 08:49 AM
    Edited by Dsp2019 Nov 01, 2021 09:07 AM

    Hi Diego, hope you are well. 

    Ultimately the decision for the endpoint to roam between APs is down to its configuration and WLAN vendor implementation. 

    May be worth checking :
      + Endpoints' WLAN network drivers are up to date/latest version. 
      + Confirm whether endpoints support and consider enabling ( if not already ) on the network : 
          IEEE Standard: 802.11k
          IEEE Standard: 802.11r
          IEEE Standard: 802.11v
      + WiFi Roaming Sensitivity or Aggressiveness, settings. ( See below an example for a Windows device)

      + Power Save endpoint mode is disabled on the clients. 
      + Make 5G preferable way of connection on your SSID.
         2.4Ghz on a restaurant environment may not perform well or suffer disconnections given number of devices, and likelihood of Microwaves potentially killing signal causing intermittent drops.
    You could run a 4th AP temporarily in SA mode to confirm any source of interference during busy periods and outside of kitchen operating hours.

      + AOS 8.8 new feature Dynamic Packet Event Capture
    This feature automates packet captures on the AP, based on anomalous events detected by the APs.

     Further reading Here > Improving client Handover and roaming
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    David Sanchez
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  • 7.  RE: Clients Roaming (Handoff) HELP

    Posted Nov 01, 2021 11:07 PM
    Hi David, thanks, hope you're well too.


    I don't think that the tablets has the ability to tune their WiFi roaming Sensitivity or Aggressiveness, even more when one of the tablets only works with 2.4GHz, basically a low end device. I'm gonna take a look at the IEEE standards to see how it goes.


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    Diego Joubert
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