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What Are Sticky Clients? 802.11k,v,r Explained

Discussion in 'General Wireless Discussion' started by thiggins, Feb 26, 2016.

  1. thiggins

    thiggins Mr. Easy Staff Member

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    Great article from WiFi Nigel explaining why some devices don't like to move to a better AP (or wireless extender) and what you can do about it.
    What Are Sticky Clients? The article also explains 802.11k and v.

    This Microsoft Article talks about Windows 10's support for 802.11k,v,r.

    Here is Apple's description of iOS support for 802.11k,v,r.

    Another Apple roaming reference:
    Wireless roaming reference for enterprise customers

    Mysteries of Wi-Fi Roaming Revealed.
    7 Signal whitepaper. Requires submitting name and "organization" but no email.
     
    Last edited: Oct 13, 2016
  2. sfx2000

    sfx2000 Part of the Furniture

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    Interesting article...

    Should note that idle vs. active clients - it's about a 10 dB difference when camping across different AP's - and there's a threshold there before a client will jump...

    -70 dBM is a rough number as many clients have different receive sensitive and sleep timelines....
     
  3. pete y testing

    pete y testing Very Senior Member

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    so how does that relate to Roaming assistant in the asus profesional wifi settings

    as you can adjust the -70db threshold up or down
     
  4. sfx2000

    sfx2000 Part of the Furniture

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    It's a challenge, as the RSSI threshold is on the device, not necessarily on the AP, and different devices... so for tuning Asus Roaming Assistant, what might be good for a tablet might not apply for a handset or laptop...

    The other challenge, like I mentioned above, is that idle/sleep, the device may camp, whereas having an active application accessing the WLAN, the threshold might step from -70 to -60 (depends on the client implementation).

    active/idle handoff is very dependent on how the vendor has implemented things on the device - the AP might be able to help, but again, this is also implementation.
     
  5. pete y testing

    pete y testing Very Senior Member

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    its a shame those that set the certification havnt force at least some form of uniformity when it comes handoff
     
  6. joegreat

    joegreat Very Senior Member

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    Interesting read, but to it looks like this is simply of our control, right? :rolleyes:

    In my setup at home, I have a good roaming for 5 GHz clients (due to lower signal levels), but sticky and slow throughput clients on the 2.4 GHz band. :(
     
  7. thiggins

    thiggins Mr. Easy Staff Member

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    That is typical. More 5 GHz / dual-band STAs have implemented 11v and/or 11k than 2.4 GHz only STAs.
     
    joegreat likes this.
  8. thiggins

    thiggins Mr. Easy Staff Member

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    Read the article.
     
  9. Shabbir Rao

    Shabbir Rao Regular Contributor

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    Nice one
     
  10. Neri123

    Neri123 New Around Here

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    I liked the article
     
  11. paraplu

    paraplu Regular Contributor

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    What about L2 ARP protocol?
    Say you have a switch with two AP's attached. With a mac table update (arp timeout) of, say, 60s. Would this mean the L2 handover could take worst-case 60s?
    Just thinking loud.
     
  12. sfx2000

    sfx2000 Part of the Furniture

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    @thiggins - sticky clients are a problem no doubt...

    Also consider it's evil twin - the client that rapidly ping-pongs between either radios on a dual-band AP, or between AP's in an ESS where multiple AP's are in play - it can run an AP out of resources/memory very quickly, or cause race conditions in the AP or WLC itself.

    I've actually seen this first hand... and one ends up with a real problem there...
     
    Vexira likes this.