Wireless Access

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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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DFS testing - manual channels

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  • 1.  DFS testing - manual channels

    Posted Nov 11, 2015 03:24 PM

    In the video below Chuck talks about manually setting DFS channels for testing in environments.

    https://www.youtube.com/watch?v=C12htufdmzY&feature=youtu.be

     

    I was wondering what the cli procedure (commands) for this would be and what commands would I use to monitor any changes. 



  • 2.  RE: DFS testing - manual channels

    Posted Nov 11, 2015 03:54 PM

    Hi,

    You can configure cahnnels manually in the radio settings. To monitor you have arm history command - below is a dump from my IAP...

     

     

    MK-IAP# show ap arm history

    Interface :wifi0
    ARM History
    -----------
    Time of Change Old Channel New Channel Old Power New Power Reason
    -------------- ----------- ----------- --------- --------- ------
    2015-11-10 21:14:22 124+ 124+ Max 21 P-
    Interface :wifi1
    ARM History
    -----------
    Time of Change Old Channel New Channel Old Power New Power Reason
    -------------- ----------- ----------- --------- --------- ------
    2015-11-11 21:47:21 11 1 18 18 I
    2015-11-11 16:58:13 1 11 18 18 I
    2015-11-11 16:24:59 11 1 18 18 I
    2015-11-11 15:45:27 1 11 18 18 I
    2015-11-11 15:21:19 11 1 18 18 I
    2015-11-11 14:22:43 1 11 18 18 I
    2015-11-11 13:52:52 11 1 18 18 I
    2015-11-11 12:56:33 1 11 18 18 I
    2015-11-11 12:39:40 11 1 18 18 I
    2015-11-11 07:09:12 1 11 18 18 I
    2015-11-10 23:31:24 11 1 18 18 I
    2015-11-10 23:03:33 1 11 18 18 I
    2015-11-10 22:39:43 11 1 18 18 I
    2015-11-10 22:04:01 1 11 18 18 I
    2015-11-10 21:42:02 11 1 18 18 I
    2015-11-10 21:14:24 11 11 Max 18 P-
    I: Interference, R: Radar detection, N: Noise exceeded, Q: Bad Channel Quality E: Error threshold exceeded, INV: Invalid Channel, G: Rogue AP Containment, M: Empty Channel, P+: Increase Power, P-: Decrease Power, 40INT: 40MHZ intol detected on 2.4G, NO40INT: 40MHz intol cleared on 2.4G, OFF: Turn off Radio, ON: Turn on Radio

     

     

    HTH,

    Marek



  • 3.  RE: DFS testing - manual channels

    Posted Nov 12, 2015 11:17 AM

    Do I need to disable ARM?

     

    Wont ARM change the channel if it detects others?

    Does this also mean that i'd need to create a radio-profile for each AP or channel/power setting to change channels efficiently?



  • 4.  RE: DFS testing - manual channels

    Posted Nov 12, 2015 03:51 PM

    @playinpearls wrote:

    Do I need to disable ARM? 

     

    NO, why? 

     

    Wont ARM change the channel if it detects others?

     

    ARM is able to dynamically adapt to inetrferences, select the best channel and TX power, however Radar detection is completely different story

     

    Does this also mean that i'd need to create a radio-profile for each AP or channel/power setting to change channels efficiently?

     

    You can create list of desired channels or you can create manual configuration, sort of... 


    Cheers, 



  • 5.  RE: DFS testing - manual channels

    Posted Nov 13, 2015 06:52 AM

    Aruba APs were not meant to have static channels, so it can be done, but it takes a little work:

     

    To manually set a DFS channel for an AP, first create a regulatory domain profile removing the regular channels then adding a single DFS channel, then configure it, using ap-specific:  Here is an example using channel 60:

     

    ap regulatory-domain-profile "Channel60"
      no valid-11a-channel 36
      no valid-11a-channel 40
      no valid-11a-channel 48
      no valid-11a-channel 153
      no valid-11a-channel 157
      no valid-11a-channel 161
      no valid-11a-channel 165
      valid-11a-channel 60
    !
    ap-name "Kitchen-225"
      regulatory-domain-profile "Channel60"

    If you apply that to an access point with ARM, it will only select the only channel in its regulatory domain.  In the specific configuration above, this will only work if you have the AP configured for 20 mhz channels.  You would have to choose a regulatory domain profile with 40mhz channel pairs if you want to test at 40mhz.

     

     

    To see if the AP has had any DFS events, I would look for radar messages in the wireless log:

     

    show log wireless 50
    Aug 27 10:21:23 :404076:  <WARN> |AP Kitchen-225@10.99.154.29 sapd|  AM 18:64:72:fb:30:50: Radar detected on interface wifi0, channel 132, typeid 7
    Aug 27 10:21:24 :404088:  <WARN> |AP Kitchen-225@10.99.154.29 sapd|  AM 18:64:72:fb:30:50: ARM HT Radar Detected Trigger Current Channel old 132E new 100E/6