Dual band

[Ben Greear]

On 01/02/2018 07:25 AM, Fejes József wrote:
> On Tue, Jan 2, 2018 at 4:14 PM, Ben Greear <greearb at candelatech.com> wrote:
>>
>>
>>
>> On 01/02/2018 04:28 AM, Fejes József wrote:
>>>
>>> Hi,
>>>
>>> This question was asked a couple of years ago (eg. here
>>> http://lists.infradead.org/pipermail/hostap/2012-January/025117.html)
>>> with a negative answer.
>>>
>>> However, it seems like things have changed in Linux at least. Recent
>>> wifi cards support multiple virtual interfaces with multiple channels.
>>> Eg. with the command: iw dev wlan0 interface add wlan1 type __ap .
>>> Thus even if I have one card with one chip, I can have multiple wlan
>>> devices and the card will handle communication with different
>>> bands/channels accordingly.
>>
>>
>> Which cards do you think support this option?
>>
>
> For example iw reports this for a BCM4366 (it also reports both 2.4GHz
> and 5GHz bands in the channel list):
>
> valid interface combinations:
> * #{ managed } <= 1, #{ P2P-device } <= 1, #{ P2P-client, P2P-GO } <= 1,
>   total <= 3, #channels <= 1
> * #{ managed } <= 1, #{ AP } <= 1, #{ P2P-client } <= 1, #{ P2P-device } <= 1,
>   total <= 4, #channels <= 1
> * #{ AP } <= 4,
>   total <= 4, #channels <= 1, STA/AP BI must match
>
> Last combination is the key, you can create 4 AP-type interfaces at
> the same time. Although it says channels<=1 which is weird for
> dual-band but whatever. I've seen pastes where channels was 2.

I guess if you could find something that would give you multiple concurrent channels
support, then it might work.  But, in that case, it would seem simpler all
around to just have it act as two radios.

Thanks,
Ben

>
>
>
>>
>> Thanks,
>> Ben
>>
>>>
>>> My question is, does hostap work with such virtually created
>>> interfaces for the same chip?
>>>
>>> It would be even better if hostap could create such virtual interfaces
>>> on its own. Is it supported or is it going to be supported?
>>>
>>> Cheers,
>>> Jozsef
>>>
>>> _______________________________________________
>>> Hostap mailing list
>>> Hostap at lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/hostap
>>>
>>
>> --
>> Ben Greear <greearb at candelatech.com>
>> Candela Technologies Inc  http://www.candelatech.com
>

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com