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> -----Original Message-----
> From: tech-net-owner@NetBSD.org [mailto:tech-net-owner@NetBSD.org] On
> Behalf Of Konstantin Kabassanov
> Sent: mardi 11 mai 2004 12:00
> To: David Young
> Cc: tech-net@NetBSD.org
> Subject: Re: atheros 5212 card in adhoc mode and "no buffer space"
> 
> Dave,
> 
> Sorry for the delayed answer.
> 
> The bogus xmit rate has gone. Thanks.
> Concerning the message "no buffer space", I can still see it when I
use
> iperf on both PCs (with WG511T carss) and try to send traffic over
6Mbps.
> 
> I observed the following bugs with Netgear WAG511.  Adhoc mode is not
> working if I don't limit the media to less or
> OFDM24. If I do so, I need to put the interface corresponding to the
BSSID
> down and bring it up again, because if I don't do this, it still
announces
> all available rates. The "write failed: no buffer space available"
> reappeares as for WG511T, but for WAG511 cards, that occurs if the
traffic
> goes over 600K !!!
> 
> When trying to use 3CRPAG175 cards in adhoc mode it doesn't work at
all.
> 
> Generally I have always the following message: ath0: unable to reset
> hardware; hal status 3 if I try to modify an interface parameter when
the
> interface is up. ifconfig ath0 down and ifconfiga ath0 up solves the
> problem.
> 
> Concerning the multihop wireless networks, you are right I'm working
in
> this domain. I'm not really sure that ath-type hardware does a proper
IBSS
> merge. I'm actually testing ... That could be the explanation for the
> 3CRPAG175 problems...
> 
> Konstantin

Dave,

The only comment I saw concerning my last mail, was sam's reply about
the IBSS merge. I'm really scared by the network performances of the
adhoc mode and I'm asking myself if it is a generic driver problem or it
is a hardware issue. In addition I think it would not be very hard to
modify the master bssid node's behavior in order to set the right media
transmission rate without shutting down and giving up again its network
interface... What do you think about?

Konstantin

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