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Advertise 802.11d (country) and 802.11h (DFS/TPC) capabilities. Best Practice?

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  • 1.  Advertise 802.11d (country) and 802.11h (DFS/TPC) capabilities. Best Practice?

    Posted Jan 29, 2024 12:26 PM

    Hello everyone,

    is there a current "best practice" regarding the broadcast of 802.11d (country info (channels, power)) and 802.11h (DFS/TPC)?
    In particular, I'm concerned with networks here in Europe/Germany, with predominantly only national devices.

    Some manufacturers (such as Aruba) have 802.11d disabled by default, is this due to possible compatibility issues or is its use simply outdated?
    Does the use of 802.11h always also include 802.11d?
    Is this usually activated automatically as soon as channels that require DFS/TPC are used?
    Is there a scanner/analyzer app that can evaluate the 802.11d/h information?

    Thank you very much for any help!
    Greetings, Martin



  • 2.  RE: Advertise 802.11d (country) and 802.11h (DFS/TPC) capabilities. Best Practice?

    Posted Feb 12, 2024 10:53 AM

    Some devices (in the past) have shown incompatibility with some of the 802.11 substandards like 11d and 11k. Probably for that reason it's disabled by default.

    You can use Aruba Utilities (Android) to display beacon information in a nice way.

    In Aruba Central, enabling 11d and 11h is the same option, so they seem to go together. In general, the defaults in Aruba are a safe choice and balanced for device performance and compatibility.



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    Herman Robers
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    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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    Original Message


  • 3.  RE: Advertise 802.11d (country) and 802.11h (DFS/TPC) capabilities. Best Practice?

    Posted Feb 15, 2024 03:16 PM

    I can speak for incompatibility, probably about 4-5 years ago we had handheld scanners that would not connect to our Wi-Fi and it was due to 802.11d being enabled on one end and not the other. We ultimately decided to just disable it across the board and haven't had any problems that I'm aware of. We are US-based though and I'm not familiar with the regulations in Europe. 



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    Michael Haring
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    Original Message


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