Date: Wed, 12 Nov 2003 06:23:09 +0200 From: Johann Hugo <jhugo@icomtek.csir.co.za> To: current@freebsd.org Subject: Re: atheros (ath) driver - media option Message-ID: <200311120623.09159.jhugo@icomtek.csir.co.za>
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On Wednesday 12 November 2003 00:54, Sam Leffler wrote: > Not sure what you're trying to accomplish by setting the media when > operating in hostap mode. It should be ignored, but I'm not sure exactly > what will happen. Locking the tx rate on the client side makes more sense > and should be honored correctly. Maybe I should give you some more info here. We currently have a 30km wireless link to a remote site: Lucent/orinoco AP -----30km ----- FreeBSD client with Lucent adapter. The problem is that over that distance the SIFS counter expires on most of the packets before we receive a ACK on the other side. So the throughput is way down. I've decided to installed a parallel/experimental link on another frq. so that I can play around with the atheros driver/cards and also 11g. The second link looks something like this: FreeBSD/HostAP/Atheros ----- 30km ------ FreeBSD/Soekris/Client/Atheros The problem is: (mode 11b media DS/1Mbps) HostAP TX = 11Mbps --------- 30km -----Client RX at 11Mbps not OK HostAP RX at 1Mbps = OK ----- 30km ----- Client TX at 1Mbps (mode 11g media OFDM/6Mbps) HostAP TX = 54Mbps --------- 30km -----Client RX at 54 Mbps not OK HostAP RX at 1Mbps = OK ----- 30km ----- Client RX at 54 Mbps not OK So I am trying to force the max TX rate on both ends to a lower speed. Another question: Do you have control over the SIFS counter. Is there a way to adjust the counter so that it will be more tolerant to longer links, or is it possible to disable the ACK's for unicast packets ? http://lists.nocat.net/pipermail/nocat/2002-April/001223.html Johann
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