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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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ARM mode-aware on AOS 8

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  • 1.  ARM mode-aware on AOS 8

    Posted Jul 23, 2021 12:00 PM
    I'm in the process of fine tuning a system following a recent upgrade to AOS 8.6 from 6.4 using the AOS 8 migration tool.

    I want to enable  ARM mode-aware to support a dense deployment consisting of AP205, AP305 and AP303H. This way the system will automatically move APs <==> AMs when there is too much overlapping interference, or when holes in RF appear. 

    In AOS 6.4 there was a check box in the rf-profile. How do I enable in AOS 8?

    Also prior to the upgrade I had a number of points that I had overridden from the AP Group profile to be AMs. I can't find a way from within the GUI or CLI to convert the AMs back to APs. I can view the AMs via the cli #show ap active details. Any pointers to documentation to reconvert the AMs to APs will be appreciated.

    Best


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    Racingyacht
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  • 2.  RE: ARM mode-aware on AOS 8

    Posted Jul 23, 2021 12:09 PM
    Mode aware does not exist in ArubaOS 8.x. unfortunately.

    The only two ways an AP can be an AM is if (1) The ap-group it is in has a radio/ARM profile that sets it to an AM or (2) There is an ap-specific configuration that attaches a radio/ARM profile configured as an AM.  For the second situation, ap-specific configurations can only be configured on the commandline in ArubaOS 8.x.  To remove an ap-specific config:

    config t
    no ap-name <name of 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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  • 3.  RE: ARM mode-aware on AOS 8

    Posted Jul 23, 2021 12:39 PM
    Hi cJoseph, 

    Thank you for the quick response. That is bad news on the mode-aware front. Is there a replacement solution to support dense deployments?
    I have been looking at the documentation for spectrum hybrid mode, but it doesn't look like it will do the same as mode-aware. There  appears to be limitation with using AP300s and AP303H as spectrum monitors. And a limitation on the  number of devices that can work in hybrid mode.

    Best

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    Racingyacht
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  • 4.  RE: ARM mode-aware on AOS 8

    Posted Jul 23, 2021 05:14 PM
    I would say that Mode aware was not predictable enough.  To modify its behavior you would have to also change the ARM coverage index, which would also change coverage patterns, so it was not perfect.  Airmatch lays out channels in a way that least interfere with each other.  This works best with 20 mhz.  You could also turn the 2.4ghz to minimum power, if you have enough coverage.  Since most clients these days prefer the 5ghz, you would have a minimum of devices on 2.4ghz, and that number should shrink over time.


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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: ARM mode-aware on AOS 8

    Posted Jul 23, 2021 05:59 PM

    I am running 20 Mhz channels, and the 2.4Ghz radio is set to EIRP of 6-12 dbm. I will observe airmatch to see how well it does the job.

    Thanks for the advice.
    Have a great weekend!

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    Racingyacht
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  • 6.  RE: ARM mode-aware on AOS 8

    Posted Jul 24, 2021 09:14 AM
    2.4ghz only has 3 non-overlapping channels and propagates more widely than the 5ghz band.  With proper 5ghz AP density, you will have much more coverage on the 2.4ghz band than you need.  The general objective is to move as many clients that are capable to the 5ghz band, so that the 2.4ghz band has as few clients as possible, so that overcoverage on 2.4 is not an issue.  It is too hard administratively or automatically to turn on and off APs in response to a dynamic environment.

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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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  • 7.  RE: ARM mode-aware on AOS 8

    Posted Jul 24, 2021 12:40 PM
    Thanks. 
    I will review reducing the EIRP rate for 2.4GHz even further. There was an old recommendation to reduce to a range of 6-12 dbm, hence why I hadn't gone below this level. 

    5GHz coverage is good.

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    Racingyacht
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  • 8.  RE: ARM mode-aware on AOS 8
    Best Answer

    Posted Jul 24, 2021 05:36 PM
    Note: Some APs, cannot go as low as 3 or even 6 due to their internal antennas, so you will see some go as low 7 and not below that.  The overarching goal is to ensure (1) you have enough coverage in 2.4ghz (2) the 2.4ghz band is usable for the few clients you expect to remain in there.

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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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  • 9.  RE: ARM mode-aware on AOS 8

    Posted Jul 25, 2021 09:39 AM
    Many thanks

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    Racingyacht
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