Question on ht40_intolerant

Ann Lo at
Fri Apr 29 00:00:53 PDT 2016

This is very helpful information.


On Thu, Apr 28, 2016 at 3:13 PM, Ben Greear <greearb at> wrote:
> On 04/28/2016 10:43 AM, Jouni Malinen wrote:
>> On Thu, Apr 28, 2016 at 06:42:15AM -0700, Ann Lo wrote:
>>> We are hoping to limit our wpa_supplicant to get connections with 20
>>> MHz channel width only. Is it adequate to set "ht40_intolerant=1"?
>>> Usually 40 MHz intolerance is used on 2.4 GHz band. Can we use it for
>>> 5 GHz band?
>> ht40_intolerant=1 does not prevent use of 40 MHz by the local device..
>> It is trying to make everyone in range not use 40 MHz on 2.4 GHz..
>> disable_ht40=1 might work for this, if I understood what you are trying
>> to do correctly.
> In case the desire is to have a VHT-20 station on a VHT80 AP, I am not
> sure it can be done.  disable-ht40 might allow you to have an HT-20 station
> on VHT80 AP.
> From what I recall, there is no way to advertise a VHT-20 station since the
> spec does not allow for a VHT station that cannot do VHT-80.
> At least with some driver hacking and proper firmware, it would be possible
> to
> disable all 40 and 80Mhz rates, so the station would always transmit 20Mhz
> rates, but it would still be receiving up to 80Mhz wide packets...
> Thanks,
> Ben
> --
> Ben Greear <greearb at>
> Candela Technologies Inc

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