How connect 2 PC with ath in hostap mode ?

[Marcin Jessa]

On Mon, 10 Oct 2005 03:05:19 +0200
Sten Daniel Sørsdal <lists at wm-access.no> wrote:

What's exactly the point of this email?
I don't see any help being provided here.
The table in question is removed. I wasn't aware of it being
copyrighted.
Next time please contact me _first_ if you're in doubt of
something. 
And when it comes to mikrotik, you can ask them to release
their GPLd code first before running to them like a stupid dog telling
on someone who used their freely avaliable information published on
the web.


> Marcin Jessa wrote:
> > On Tue, 4 Oct 2005 16:37:21 +0400
> > Andrey Smagin <samspeedu at mail.ru> wrote:
> > 
> >>Hello Marcin,
> >>Tuesday, October 4, 2005, 11:35:17 AM, you wrote:
> >>
> >>MJ> How are you bridging the interfaces? What kind of bridging
> >>MJ> mechanism are you using?
> >>
> >> In FreeBSD:
> >>  kldload ath, ath_hal, bridge, fxp
> > 
> > Recompile your kernel with following options.
> > device          wlan                    # 802.11 support
> > device          ath
> > device          ath_hal
> > device          ath_rate_sample
> > 
> >>On both host:
> >>  ifconfig_ath0="inet ssid 1234 channel 6 mode 11g mediaopt adhoc"
> >>in sysctl.conf
> >>  hw....bridge.config=ath0:1,fxp0:1
> >>  hw....bridge.enable=1
> >>  
> >>  ipfw allow ip from any to any
> >>in this mode speed about 8KBy/s
> > 
> > Try to use if_bridge instead
> > ifconfig bridge0 create up
> > ifconfig bridge0 addm ath0 fxp0 
> > etc...
> > The "old" bridge code is removed from CURRENT anyway.
> > 
> > Try to play with different sysctl values for ath as well, it may or
> > may not have an impact on your performance.
> 
> If you want to be vague, why not add a disclaimer to your e-mails?
> 
> >>  ifconfig_ath0="inet ssid 1234 channel 6 media OFDM54 mode 11g
> >>mediaopt adhoc" increase speed up to 45-50 KBy/s
> > 
> > Right, still pretty little.  You should get between 2-7 MB/s
> 
> Stating the obvious?
> 
> >>Bridging work fine and uptime for both host more
> >>wheek under full load :) (40KBy/s over wireless)
> >>Some strange - ping report low average delay about
> >>0.700ms for any host in another net segment.
> > 
> > Try to adjust values of ACK timing, I have made a table with some
> > proposed values:
> > http://www.wifibsd.org/docs/atheros.php
> 
> Taking credit for other peoples work again? Appended and attached is
> an e-mail from the authors of the ack timings. They wished to relay
> to you that you have copied the mikrotik routeros documentation
> without consent and thus potentially violated the copyright.
> 
> [...snip...]
> 
> >>
> >>MJ> I am not sure why you have such a speed loss running in adhoc
> >>MJ> mode. What I noticed on NetBSD (where the ath driver is not yet
> >>MJ> fully ported) was I got pretty decent speed with the same setup
> >>MJ> as yours (2xath in adhoc bridged with wired nics) but my
> >>MJ> embedded devices allways crashed when I sent over many small
> >>MJ> packets.
> >>  I think this is a driver problem, two ap sucessfully connect
> >>with each other, why hostap can't do this ? 
> 
> Because it would require WDS or other extension to the standard.
> 
> > That's becouse FreeBSD ath hostap is for access points , not for
> > interaction between two APs.
> 
> FreeBSD ath hostap is for AP's not for interaction between AP's?
> Where were you going with that, exactly?
> 
> [...snip...]
> 
> > Did you run tcpdump on both the hosts to find out what may be
> > causing your problems?
> >  I will test adhoc between two atheros boxes at home
> > today. 
> 
> Did your "atheros boxes" perform any better?
> 
> ---------------------------[ Appended
> e-mail ]-------------------------- Subject: [Ticket#:
> 2005100716000313] [Fwd: Re: How connect 2 PC with ath in hosta [...]
> From: "MikroTik Support [Dmitry]" <support at mikrotik.com>
> Date: Fri, 07 Oct 2005 17:09:55 +0300
> To: Sten Daniel Sørsdal <list at wm-access.no>
> 
> Hello,
> 
> The first table I've got from our developers, and I really have no
> idea where did it come from, the available frequencies table is freely
> accessible via RouterOS console and also may be obtained from atheros
> cards' eeprom. But the second one (that about ACK times) is authored
> here. Me and one my collegue have invested much time into making this
> table and his claims can be considered as copyright violation. I am
> sure he can not provide any proof of his authorship, but I still have
> few pieces of paper with some weird formulae lost somewhere on my
> table. Thank you for pointing out this issue, can you also write back
> to the list for me?
> 
> Regards,
> Dmitry
> 
> Sten Daniel Sørsdal <list at wm-access.no> wrote:
> 
> >> Apologies for the inconvenience but on the freebsd-net at freebsd.org
> >> mailing list there is a guy that claims he wrote the tables
> >> found here
> >> (http://www.wifibsd.org/docs/atheros.php).
> >>
> >> Which are identical (aside from font formatting) to the ones
> >> found here:
> >> (http://www.mikrotik.com/docs/ros/2.9/interface/wireless).
> >>
> >> Who's material is it?
> >> --
> >> Sten Daniel Sørsdal
> -----------------------------------------------------------------------
> 
> 
> -- 
> Sten Daniel Sørsdal
>