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Mobility Express 8.8.111.0: Unable to set DCA channel width to 40MHz

ANDREAS LIEBE
Level 1
Level 1

‎03-04-2019 06:47 AM - edited ‎07-05-2021 09:58 AM

I'm running ME8.8.111.0 in a small setup with 3 APs and was wondering why DCA with channel-width "best" sticks with 20MHz channels. I tried to set them to 40MHz instead of "best":

 

>config advanced 802.11a channel dca chan-width 40
ERROR: Configured DCA channels are in invalid combination for selected Channel Width.

Checking the channels looks normal to me:

Leader Automatic Channel Assignment
  Channel Assignment Mode........................ AUTO
  Channel Update Interval........................ 600 seconds
  Anchor time (Hour of the day).................. 0
  Update Contribution
    Noise........................................ Enable
    Interference................................. Enable
    Load......................................... Disable
    Device Aware................................. Disable
  CleanAir Event-driven RRM option............... Enabled
  CleanAir Event-driven RRM sensitivity.......... Medium
  CleanAir Event-driven RRM Rogue Option......... Disabled
  Channel Assignment Leader...................... aplnt1 (192.168.1.1) (::)
  Last Run....................................... 430 seconds ago
  Last Run Time.................................. 0 seconds
  DCA Sensitivity Level.......................... MEDIUM (15 dB)
  DCA 802.11n/ac Channel Width................... BEST
  DBS Max Channel Width.......................... 40 MHz
  DCA Minimum Energy Limit....................... -95 dBm
  Channel Energy Levels
    Minimum...................................... -86 dBm
    Average...................................... -86 dBm
    Maximum...................................... -86 dBm
  Channel Dwell Times
    Minimum...................................... 12 days, 03 h 31 m 44 s
    Average...................................... 37 days, 10 h 04 m 25 s
    Maximum...................................... 79 days, 03 h 07 m 18 s
  802.11a 5 GHz Auto-RF Channel List
    Allowed Channel List......................... 36,40,44,48,52,56,60,64,100,
                                                  104,108,112,116,120,124,128,
                                                  132,136,140
    Unused Channel List..........................
  DCA Outdoor AP option.......................... Disabled

Any idea why the controller complains about an invalid combination?

 

Thanks,

Andreas

 

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