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AP-577 Transmit EIRP Settings

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  • 1.  AP-577 Transmit EIRP Settings

    Posted Apr 24, 2023 03:29 PM

    About a year ago, we installed an AP-577 on the side of one of our buildings, overlooking a grass area about the size of a football field. It's mounted 10 meters up and pointed straight out, as recommended in an Aruba Atmosphere 2021 video. There are no trees and it's an open area where students use for recreation.

    I never adjusted the transmit EIRP settings from what they are set to on the inside of our buildings:
                 - 2.4Ghz: 6-12dbm
                 - 5Ghz: 15-21

    It works okay but I feel like the speeds could be better at the far end of the field. What are everyone else's transmit EIRP settings for outdoor APs? Is there a default that I should try that's different than what it's already set to?



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    Nathan K
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  • 2.  RE: AP-577 Transmit EIRP Settings

    Posted Apr 25, 2023 08:12 AM

    What are the settings that your radios select (channels, channel width and power)?
    Do you just have one AP?
    Is there other WiFi around in that area?
    How many clients are connected when you experience that low speed?
    How strong is the WiFi signal at that point (number of bars is an indication)?
    Do you also see indoor clients connected to that outdoor AP?

    As you can see there are many things to evaluate, and it may be good to have a look with your Aruba Partner or Aruba Support at the data.



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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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  • 3.  RE: AP-577 Transmit EIRP Settings

    Posted Apr 25, 2023 03:07 PM

    Hello,

    I'll have to check. I normally just have my iPhone with me for testing.

    Yes, there's just one AP but according to the specs, it should easily cover this area. I know I said a football field but it's a little bit smaller with no trees.

    The only other wifi in the area is inside the buildings.

    I mostly get two bars, out of 3, on my iPhone 14 Pro. 

    No, the system seems to be very good at keeping indoor clients connected to indoor APs.



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    Nathan K
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  • 4.  RE: AP-577 Transmit EIRP Settings

    Posted May 01, 2023 12:36 PM
    Edited by nkuhl1630 May 01, 2023 12:41 PM

    At the suggestion of one of our Aruba reps, I changed the 2.4Ghz max EIRP to 27dBi, and maxed out the 5Ghz EIRP setting. This didn't seem to do much, if not make it worse.

    This is our first outdoor AP on campus. Is there anything special that needs to be done when provisioning these APs as opposed to a standard, ceiling-mounted, classroom AP? I noticed the following in some documentation:

    You do not need to provision APs before installing and using them. The exceptions are outdoor APs, which have antenna gains that you must provision before they can be used, and APs configured for mesh. You must provision the AP before you install it as a mesh node in a mesh deployment.

    Is there anything significant in this statement? Not using mesh. Just a standard AP-577. We didn't provision any sort of antenna gain before installing it.



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    Nathan K
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  • 5.  RE: AP-577 Transmit EIRP Settings

    Posted May 01, 2023 02:18 PM
    Edited by nkuhl1630 May 01, 2023 03:43 PM

    Update

    It ended up being a power issue. I initially just increased the max EIRP on both radios and that didn't have any effect. Increasing the min EIRP fixed the problem. I'm now getting 300Mbps+ at over 100m easy. I'll have to dial the power back a bit, and maybe even disable 2.4Ghz. But all in all, these AP-577s are awesome.



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    Nathan K
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  • 6.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 10:39 AM

    I know this is a year+ old, but what settings did you ended up using for these? What did you set the min/max for both radios? TIA.



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  • 7.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 10:50 AM

    I maxed out both radios but ended up disabling 2.4Ghz: Min 39 Max 127.




  • 8.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 10:50 AM

    Outdoor APs, run at max for the regulatory domain and then adjust back from there if necessary.



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    Carson Hulcher, ACEX#110
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  • 9.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 11:58 AM

    Thanks - would this be the case for both 2.4 and 5? TIA.



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  • 10.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 12:05 PM

    2.4 GHz should be 6 dBm lower than 5 GHz to encourage dual band devices to use 5 GHz, or just disabled entirely.



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    Carson Hulcher, ACEX#110
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  • 11.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 12:32 PM

    My case is I have an AP mounted 3m high on a pole (zero down tilt),  in front of a turf field. Ideally I want to get coverage 200ft straight out, completely open air. Using Hamina, it seems I should get -65 dBm with no issues with EIRP set at 15. Current EIRP settings for 5ghz are 15-21, min 20mhz max 40mhz channel bandwidth. 2.4 is set to EIRP 6-12 and 20mhz only. This is a 587, but also have a 585.

    Looking in the controller with "show ap active" I see the following:

    587 - AP:5GHz-HE:48/15.0/23.5/0             AP:2.4GHz-HE:1/12.0/32.0/0

    585 - AP:5GHz-HE:153/15.0/35.5/0            AP:2.4GHz-HE:1/12.0/29.4/0

    So is the max shown above based on the channel's max allowed under the reg. domain? So just set the min/max to 127 for example?

    Or maybe the issue is I need to down tilt it a bit? TIA.



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  • 12.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 01:08 PM

    The MaxEIRP in that output is the maximum power that the AP can output from that radio.  Check show ap debug power-table ap-name <name> radio <#> to see more detailed information.  Down tilt with the AP installed at 3 meters is not necessary.

    If you aren't getting the signal that you are expecting, set the max power to 127 (or 33 or 36 or whatever the regulatory maximum is) and then set the minimum power 3 dBm or 6 dBm lower than the maximum that the regulatory domain allows.  This allows AirMatch to make some adjustments, should you have multiple APs in the area, while making sure that the minimum coverage is met.



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    Carson Hulcher, ACEX#110
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  • 13.  RE: AP-577 Transmit EIRP Settings

    Posted Oct 03, 2024 02:21 PM

    Thank you - and you had to be expecting me asking next: what's my reg domain max? I'm in the US.

    Using the 'show ap allowed-max-EIRP ap-name <name>' command for an AP587, it shows:

    Warning: This command has been deprecated.
    
    Max EIRP setting for AP-587
    ---------------------------
    Channel  1     2     3     4     5     6     7     8     9     10    11    12  13  14  36    40    44    48    52    56    60    64    100   104   108   112   116   120   124   128   132   136   140   144   149   153   157   161   165
    -------  -     -     -     -     -     -     -     -     -     --    --    --  --  --  --    --    --    --    --    --    --    --    ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---   ---
    b        31.4  32.8  32.8  32.8  32.8  32.8  32.8  32.8  32.8  32.8  30.6  *   *   *   *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *     *
    g/a      29.9  31.9  31.9  31.9  31.9  31.9  29.8  29.8  29.8  29.8  26.8  *   *   *   20.4  20.9  20.9  20.9  23.7  23.7  23.3  24.0  23.8  23.8  23.8  23.8  23.8  23.7  23.7  23.7  23.7  23.7  23.4  23.9  33.2  33.3  33.3  33.3  33.2
    HT 20    29.0  31.9  31.9  31.9  31.9  31.9  28.2  28.2  28.2  28.2  25.2  *   *   *   20.6  20.6  20.4  20.5  24.0  24.1  24.1  24.2  24.1  24.1  24.1  24.1  24.1  24.0  24.0  24.0  24.0  24.0  23.7  24.2  33.0  33.3  33.3  33.3  33.2
    HT 40    25.7  25.7  25.7  24.7  24.7  24.7  24.7  22.8  19.8  19.8  19.8  *   *   *   20.6  20.6  20.5  20.5  26.8  26.8  26.9  26.9  27.3  27.3  27.5  27.5  27.5  27.5  27.5  27.5  27.2  27.2  27.4  27.4  33.3  33.3  33.2  33.2  *
    VHT 80   *     *     *     *     *     *     *     *     *     *     *     *   *   *   20.5  20.5  20.5  20.5  28.6  28.6  28.6  28.6  27.3  27.3  27.3  27.3  28.8  28.8  28.8  28.8  28.7  28.7  28.7  28.7  32.1  32.1  32.1  32.1  *
    VHT 160  *     *     *     *     *     *     *     *     *     *     *     *   *   *   22.0  22.0  22.0  22.0  22.0  22.0  22.0  22.0  24.1  24.1  24.1  24.1  24.1  24.1  24.1  24.1  *     *     *     *     *     *     *     *     *
    

    Assuming I'm using HT40, they go between 20.5 and 33.3. Hence should I set the max to 33 (and min to 27)? My understanding is that this command shows these limits, but it does show it has been deprecated. BTW, I'm under ArubaOS 8.10 and not central managed. And sorry to hijack this thread...

    TIA.



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