Date: Wed, 08 Mar 2006 20:09:11 -0800 From: Sam Leffler <sam@errno.com> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: freebsd-stable@freebsd.org, JoaoBR <joao@matik.com.br> Subject: Re: ath(4) and 802.11g speed Message-ID: <440FAA67.7020708@errno.com> In-Reply-To: <200603091105.38164.doconnor@gsoft.com.au> References: <20060308231529.GA2049@afflictions.org> <20060308235940.GA64762@intserv.int1.b.intern> <200603082111.37010.joao@matik.com.br> <200603091105.38164.doconnor@gsoft.com.au>
index | next in thread | previous in thread | raw e-mail
Daniel O'Connor wrote: > On Thursday 09 March 2006 10:41, JoaoBR wrote: >>> It looks like "man ath" does not list all media and mediaopt values. >> sure not because there are lots of different cards out with different >> mediaopts so you need to read your hw-manual or your card can answer >> ifconfig -m ath0 > > In any case I imagine there is no point forcing it to use 54Mbit - it will > negotiate the highest speed it can manage based on signal strength and > hardware support (for the AP and the card) automatically. > > I suspect forcing 54Mbit will either not work at all (because the signal isn't > strong enough or your hardware doesn't support it), or it will negotiate a > speed up to 54Mbit (which would result in no functional change). > Locking the transmit rate (and that's what setting the media does) can be useful but rarely when operating in any configuration but a p2p setup where the endpoints are fixed. The algorithm used to select a transmit rate for a frame is very important to getting good performance. John Bickett's sample algorithm, typically used with ath, is pretty good but could still be improved. Samhome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?440FAA67.7020708>