Maximum of how many wireless cards

Denis Vlasenko vda at port.imtp.ilyichevsk.odessa.ua
Mon Jul 12 11:09:00 EDT 2004


On Monday 12 July 2004 12:48, Jim Thompson wrote:
> On Jul 12, 2004, at 1:37 AM, Denis Vlasenko wrote:
> > On Monday 12 July 2004 11:17, Jim Thompson wrote:
> >> On Jul 10, 2004, at 1:39 PM, Denis Vlasenko wrote:
> >>> On Saturday 10 July 2004 08:59, nondito wrote:
> >>>> Hi,
> >>>>
> >>>> Maximum of how many wireless cards I can use in a
> >>>> hostap box?
> >>>>
> >>>> I have 6 PCI slots, can the driver support loading
> >>>> upto 6 wireless cards?
> >>>
> >>> I used 3 cards at once. No apparent problems.
> >>
> >> Did you try it at range?
> >
> > Yes. Two cards in one box, each serving at least ~5 km
> > long link.
>
> And, if you turn off one of the cards, does the link throughput (at
> range) improve?

In fact, I discovered needed ch spacing by moving one card away
(in freq space) from other one which was sitting at 1st ch
until TCP throughput stopped to be outrageously low.
With 1 and 6 channels I get 200kb/s. It does not measurable
improve with 1 and 7 ch.


> >>> Channels 1 and 5 would interfere. Only 1 and 6 wouldn't.
> >>> In other words, you need at least 4 channels in between.
> >>> Basically, you can use 1,6,11 and 16th channel. ;)
> >>
> >> The whole "three non-overlapping channels" thing is a myth.  See
> >> previous message.
> >>
> >>> No, I don't know how to set 16th channel.
> >>
> >> There is no 16th channel.  Its unlikely that the VCOs on your card
> >> will
> >> tune the radio that high anyway.
> >
> > Atheros is rumored to be able to go way higher (and to be able to go
> > lower than 1st ch) than that.
>
> The 'rumor' is true.  I can't say 'how far' (NDAs).  This is (one of
> the reasons) why madwifi has a HAL.

Sooner or later, it will become known to mere humans. Hehe.
--
vda




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