hostapd error

Ben Greear greearb at
Mon Mar 28 12:10:02 PDT 2016

On 03/27/2016 10:35 AM, Jouni Malinen wrote:
> On Sat, Mar 26, 2016 at 08:51:30AM -0700, Ben Greear wrote:
>> That would not fix the case where you want to:
>> create 80Mhz AP on CH 36  #  Might want to change primary channel
>> create 20Mhz AP on CH 36  #  Cannot change primary channel.
>> When 80Mhz AP is created, no other vif exists, so it has no way to know
>> it cannot change primary channel.
> If you know that you want both of those BSSes, you'd simply start the
> second one first. If you do not know about the second one in the
> beginning and start the first one first, you'll need to meet the
> constraints on the primary/secondary channel.

My system, at least, is dynamic, and I do not want to restart existing
AP vifs if user adds or modifies a second one.  I'm building test equipment,
so doing exactly what the user asks, as much as possible, is more important.

Forcing the system to use the requested channel configuration falls under
this category in my opinion.

> I don't see how this would be of any justification against automatically
> detecting local constraints when starting new BSSes while I see not much
> chances of getting the configuration parameter accepted.

Taking local constraints into account would probably be an improvement
either way.  It would at least work more often, even if it doesn't actually
fix *my* case.

I don't know Ann's exact limitations, so possibly what you suggest would work
for her.


Ben Greear <greearb at>
Candela Technologies Inc

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